COMPREHENSIVE CROSS-DATABASE IDENTIFIER AND FUNCTIONAL MAPPING REFERENCE
HUMAN JAK2 (Janus Kinase 2)
Section 1: Gene Identifiers
Primary Gene Identifiers
| Database | Identifier | Notes |
|---|
| HGNC ID | HGNC:6192 | Approved symbol |
| HGNC Symbol | JAK2 | Official gene symbol |
| HGNC Name | Janus kinase 2 | Full approved name |
| Ensembl Gene | ENSG00000096968 | Human Ensembl gene ID |
| NCBI Entrez Gene | 3717 | NCBI Gene ID |
| OMIM | 147796 | Gene/locus entry |
| PharmGKB Gene | PA29989 | VIP gene (Very Important Pharmacogene) |
Genomic Location
| Attribute | Value |
|---|
| Chromosome | 9 |
| Cytogenetic Band | 9p24.1 |
| Start Position (GRCh38) | 4,984,390 |
| End Position (GRCh38) | 5,129,948 |
| Strand | + (forward/positive) |
| Gene Length | 145,558 bp |
| Biotype | protein_coding |
Additional Identifiers
| Database | Identifier |
|---|
| CCDS | CCDS6457 |
| VEGA | Available |
| COSMIC | JAK2 |
Gene Classification
| - Locus Group | - Locus Type | - Status | - Aliases | - Gene Groups |
|---|
| protein-coding gene | gene with protein product | Approved | JTK10 | SH2 domain containing, FERM domain containing, Jak family tyrosine kinases | |
| | | | | Transcript Identifiers** |
Ensembl Transcripts
Total Transcript Count: 15
| Transcript ID | Biotype | Start | End | Strand |
|---|
| ENST00000381652 | protein_coding | 4,985,272 | 5,129,948 | + |
| ENST00000476574 | protein_coding | 4,985,033 | 5,022,065 | + |
| ENST00000487310 | protein_coding_CDS_not_defined | 5,125,965 | 5,126,974 | + |
| ENST00000636127 | protein_coding | 4,984,390 | 5,078,444 | + |
| ENST00000870320 | protein_coding | 4,984,825 | 5,128,092 | + |
| ENST00000870321 | protein_coding | 4,984,942 | 5,128,183 | + |
| ENST00000870322 | protein_coding | 4,985,090 | 5,128,183 | + |
| ENST00000870323 | protein_coding | 4,984,590 | 5,127,506 | + |
| ENST00000870324 | protein_coding | 4,985,276 | 5,128,002 | + |
| ENST00000870325 | protein_coding | 4,985,254 | 5,127,517 | + |
| ENST00000963937 | protein_coding | 4,985,240 | 5,129,940 | + |
| ENST00000963938 | protein_coding | 4,984,539 | 5,127,513 | + |
| ENST00000963939 | protein_coding | 4,984,930 | 5,127,323 | + |
| ENST00000963940 | protein_coding | 4,984,994 | 5,127,324 | + |
| ENST00000963941 | protein_coding | 4,985,755 | 5,127,495 | + |
RefSeq Transcripts (Human)
mRNA Transcripts:
| RefSeq ID | Status | MANE Select |
|---|
| NM_004972 | REVIEWED | ✓ Yes (Canonical) |
| NM_001322194 | REVIEWED | No |
| NM_001322195 | REVIEWED | No |
| NM_001322196 | REVIEWED | No |
| NM_001322198 | REVIEWED | No |
| NM_001322199 | REVIEWED | No |
| NM_001322204 | REVIEWED | No |
Non-coding RNA:
NR_169763 (ncRNA, REVIEWED)
NR_169764 (ncRNA, REVIEWED)
CCDS IDs
CCDS6457 - Consensus coding sequence
Canonical Transcript Exons (ENST00000381652)
Total Exon Count: 25
| Exon ID | Start | End | Length |
|---|
| ENSE00001489462 | 4,985,272 | 4,985,630 | 358 bp |
| ENSE00001489459 | 4,985,940 | 4,986,022 | 82 bp |
| ENSE00001489453 | 5,021,963 | 5,022,213 | 250 bp |
| ENSE00000687814 | 5,029,783 | 5,029,906 | 123 bp |
| ENSE00003505962 | 5,044,403 | 5,044,520 | 117 bp |
| ENSE00003342058 | 5,050,686 | 5,050,831 | 145 bp |
| ENSE00000687923 | 5,054,563 | 5,054,884 | 321 bp |
| ENSE00000687929 | 5,055,669 | 5,055,788 | 119 bp |
| ENSE00001282918 | 5,064,883 | 5,065,040 | 157 bp |
| ENSE00001282909 | 5,066,678 | 5,066,789 | 111 bp |
| ENSE00000687945 | 5,069,022 | 5,069,208 | 186 bp |
| ENSE00001282899 | 5,069,925 | 5,070,052 | 127 bp |
| ENSE00000687951 | 5,072,492 | 5,072,626 | 134 bp |
| ENSE00001282890 | 5,073,698 | 5,073,785 | 87 bp |
| ENSE00001282885 | 5,077,453 | 5,077,580 | 127 bp |
| ENSE00000687968 | 5,078,306 | 5,078,444 | 138 bp |
| ENSE00000687973 | 5,080,229 | 5,080,380 | 151 bp |
| ENSE00001282875 | 5,080,533 | 5,080,683 | 150 bp |
| ENSE00001282867 | 5,081,725 | 5,081,861 | 136 bp |
| ENSE00000688013 | 5,089,674 | 5,089,863 | 189 bp |
| ENSE00000688019 | 5,090,446 | 5,090,570 | 124 bp |
| ENSE00001282842 | 5,090,739 | 5,090,911 | 172 bp |
| ENSE00001282833 | 5,123,004 | 5,123,121 | 117 bp |
| ENSE00001282826 | 5,126,333 | 5,126,446 | 113 bp |
| ENSE00001489355 | 5,126,684 | 5,129,948 | 3,264 bp |
Section 3: Protein Identifiers
UniProt Accessions
| UniProt ID | Status | Organism | Name |
|---|
| O60674 | Reviewed (Swiss-Prot) ✓ | Human | Tyrosine-protein kinase JAK2 |
Protein Properties (O60674)
- Length: 1,132 amino acids
- Molecular Mass: 130,674 Da
- Alternative Names: Janus kinase 2
RefSeq Protein Accessions (Human)
| RefSeq Protein | Status | MANE Select |
|---|
| NP_004963 | REVIEWED | ✓ Yes (Canonical) |
| NP_001309123 | REVIEWED | No |
| NP_001309124 | REVIEWED | No |
| NP_001309125 | REVIEWED | No |
| NP_001309127 | REVIEWED | No |
| NP_001309128 | REVIEWED | No |
| NP_001309133 | REVIEWED | No |
Protein Domains and Families (InterPro)
Total Domain Annotations: 23
| InterPro ID | Short Name | Type |
|---|
| IPR000299 | FERM_domain | Domain |
| IPR000719 | Prot_kinase_dom | Domain |
| IPR000980 | SH2 | Domain |
| IPR001245 | Ser-Thr/Tyr_kinase_cat_dom | Domain |
| IPR008266 | Tyr_kinase_AS | Active_site |
| IPR011009 | Kinase-like_dom_sf | Homologous_superfamily |
| IPR011993 | PH-like_dom_sf | Homologous_superfamily |
| IPR016251 | Tyr_kinase_non-rcpt_Jak/Tyk2 | Family |
| IPR017441 | Protein_kinase_ATP_BS | Binding_site |
| IPR019748 | FERM_central | Domain |
| IPR019749 | Band_41_domain | Domain |
| IPR020635 | Tyr_kinase_cat_dom | Domain |
| IPR020693 | Tyr_kinase_non-rcpt_Jak2 | Family |
| IPR035588 | PTK_Jak2_rpt1 | Domain |
| IPR035589 | PTKc_Jak2_rpt2 | Domain |
| IPR035860 | JAK2_SH2 | Domain |
| IPR035963 | FERM_2 | Homologous_superfamily |
| IPR036860 | SH2_dom_sf | Homologous_superfamily |
| IPR037838 | JAK2_FERM_C-lobe | Domain |
| IPR041046 | FERM_F2 | Domain |
| IPR041155 | FERM_F1 | Domain |
| IPR041381 | JAK1-3/TYK2_PHL_dom | Domain |
| IPR051286 | JAK | Family |
Section 4: Structure Identifiers
Experimental Structures (PDB)
Total PDB Structure Count: 164+
All structures are determined by X-ray Diffraction.
TOP 50 PDB Structures (by resolution):
| PDB ID | Resolution (Å) | Description |
|---|
| 8BXH | 1.30 | JAK2 JH1 + momelotinib |
| 7LL4 | 1.31 | JAK2 JH1 + PN5-114 |
| 3UGC | 1.34 | JAK2 + NVP-BBT594 (type II) |
| 7REE | 1.38 | JAK2 JH1 + YM2-059 |
| 8BA3 | 1.40 | JAK2 JH2 + Bemcentinib |
| 8BX9 | 1.40 | JAK2 JH1 + ilginatinib |
| 7TEU | 1.45 | JAK2 JH1 + YLIU-04-105-1 |
| 4IVA | 1.50 | JAK2 JH1 + inhibitor |
| 7LL5 | 1.50 | JAK2 JH1 + PN5-150 |
| 7RN6 | 1.50 | JAK2 JH1 + BBT594 |
| 8B8U | 1.50 | JAK2 JH2-V617F + HTS-A3 |
| 8B9E | 1.50 | JAK2 JH2-V617F + Z902-A3 |
| 8B9H | 1.50 | JAK2 JH2 + Z902-A3 |
| 8BA2 | 1.50 | JAK2 JH2-V617F + Z902-A1 |
| 8BM2 | 1.50 | JAK2 JH1 + gandotinib |
| 8BX6 | 1.50 | JAK2 JH1 + cerdulatinib |
| 8EX1 | 1.50 | JAK2 JH2 + Reversine |
| 5I4N | 1.54 | JAK2 JH2 E596A V617F + Mg-ATP |
| 5UT3 | 1.50 | JAK2 JH2 + IKK-2 Inhibitor VI |
| 6BS0 | 1.54 | JAK2 JH2 + 63552444 |
| 7Q7K | 1.61 | JAK2 + quinazolin derivative |
| 9ND3 | 1.62 | JAK2 JH2 + diaminotriazole |
| 8BAK | 1.65 | JAK2 JH2-V617F + Reversine |
| 4D1S | 1.66 | Pyrrole-3-carboxamide inhibitor |
| 8BPV | 1.70 | JAK2 JH1 + pacritinib |
| 6OBF | 1.71 | JAK2 JH2 + JAK179 |
| 6WTO | 1.74 | JAK2 JH1 + baricitinib |
| 4FVQ | 1.75 | JAK2 JH2 + Mg-ATP |
| 6X8E | 1.75 | JAK2 + Compound 11 |
| 5UT2 | 1.75 | JAK2 JH2 + PRT062607 |
| 4D0X | 1.82 | Pyrrole-3-carboxamide |
| 6WTN | 1.83 | JAK2 JH1 + ruxolitinib |
| 7F7W | 1.83 | JAK2-JH2 |
| 7Q7I | 1.78 | JAK2 + quinazolin derivative |
| 4D0W | 1.77 | Pyrrole-3-carboxamide |
| 8BPW | 1.80 | JAK2 JH1 + lestaurtinib |
| 3E64 | 1.80 | Fragment-based JAK2 inhibitor |
| 3KRR | 1.80 | JAK2 + quinoxaline inhibitor |
| 6BBV | 1.80 | JAK2 + compound 25 |
| 5WEV | 1.85 | JAK2 + imidazopyridine |
| 4JIA | 1.85 | JAK2 JH1 + compound 9 |
| 7JYQ | 1.86 | JAK2 JH2 + JAK020 |
| 8BXC | 1.90 | JAK2 JH1 + itacitinib |
| 6VGL | 1.90 | JAK2 JH1 + ruxolitinib |
| 6VN8 | 1.90 | JAK2 JH1 + baricitinib |
| 6VNJ | 1.90 | JAK2 JH1 + PN4-014 |
| 3E63 | 1.90 | Fragment-based JAK2 inhibitor |
| 4AQC | 1.90 | Triazolopyridine inhibitor |
| 4BBE | 1.90 | Aminoalkylpyrimidine inhibitor |
| 8C09 | 1.90 | JAK2 JH2-I559F |
Key Approved Drug Co-Crystal Structures:
| PDB ID | Drug | Resolution |
|---|
| 6VGL, 6WTN | Ruxolitinib | 1.9Å, 1.83Å |
| 6VN8, 6WTO | Baricitinib | 1.9Å, 1.74Å |
| 6VNE | Fedratinib | 2.32Å |
| 8BXH | Momelotinib | 1.3Å |
| 8BPV | Pacritinib | 1.7Å |
| 6AAJ | Peficitinib | 2.37Å |
AlphaFold Predicted Structure
| Attribute | Value |
|---|
| AlphaFold ID | AF-O60674-F1 |
| Global pLDDT | 87.46 |
| Sequence Length | 9,192 (model) |
| Fraction Very High Confidence | 68% |
Section 5: Cross-Species Orthologs
| Organism | Gene ID | Symbol | Biotype |
|---|
| Mouse (Mus musculus) | ENSMUSG00000024789 | Jak2 | protein_coding |
| Rat (Rattus norvegicus) | ENSRNOG00000059968 | Jak2 | protein_coding |
| Zebrafish (Danio rerio) | ENSDARG00000018882 | jak2b | protein_coding |
| Zebrafish (Danio rerio) | ENSDARG00000104808 | jak2a | protein_coding |
| Fruit fly (Drosophila) | No direct ortholog | - | JAK/STAT pathway: hop (hopscotch) |
| Worm (C. elegans) | No direct ortholog | - | - |
| Yeast (S. cerevisiae) | No ortholog | - | - |
| Paralogs in Human (32 total) |
|---|
| JAK1, JAK3, TYK2, and other tyrosine kinases | |
| Clinical Variants & AI Predictions** |
ClinVar Variant Summary
Total Variants: 33+
| Classification | Count |
|---|
| Likely Pathogenic | 1 |
| Uncertain Significance (VUS) | 18 |
| Likely Benign | 6 |
| Benign | 2 |
| Conflicting | 2 |
| No classification | 4 |
TOP Pathogenic/Likely Pathogenic Variants:
| ClinVar ID | HGVS Notation | Type | Classification |
|---|
| 869413 | t(3;9)(q13.31;p24.1) | Translocation | Likely pathogenic |
Notable Variants of Uncertain Significance:
| ClinVar ID | HGVS Notation | Review Status |
|---|
| 367116 | c.-138C>T | criteria provided |
| 376706 | c.1691G>T (p.Arg564Leu) | multiple submitters |
| 1337852 | c.995A>G (p.Asn332Ser) | multiple submitters |
| 2397682 | c.1936A>C (p.Asn646His) | multiple submitters |
| 2637003 | c.1407G>T (p.Lys469Asn) | multiple submitters |
| 2748717 | c.397C>T (p.Arg133Trp) | multiple submitters |
| 3899461 | c.1684G>A (p.Gly562Ser) | criteria provided |
AlphaMissense Predictions
Total Predictions: 7,572
TOP 50 Predicted Pathogenic Missense Variants (am_class = likely_pathogenic):
| Variant ID | Protein Change | Pathogenicity Score |
|---|
| 9:5029839:T:A | W95R | 0.998 |
| 9:5029839:T:C | W95R | 0.998 |
| 9:5022199:C:A | A71D | 0.992 |
| 9:5029812:G:C | A86P | 0.990 |
| 9:5029816:T:C | L87S | 0.989 |
| 9:5029809:T:C | F85L | 0.986 |
| 9:5029811:T:A | F85L | 0.986 |
| 9:5029811:T:G | F85L | 0.986 |
| 9:5022109:T:A | V41E | 0.982 |
| 9:5022198:G:C | A71P | 0.977 |
| 9:5029813:C:A | A86D | 0.977 |
| 9:5029810:T:C | F85S | 0.973 |
| 9:5029841:G:C | W95C | 0.970 |
| 9:5029841:G:T | W95C | 0.970 |
| 9:5022191:T:G | C68W | 0.969 |
| 9:5022103:T:C | L39P | 0.963 |
| 9:5029840:G:C | W95S | 0.962 |
| 9:5029839:T:G | W95G | 0.956 |
| 9:5029840:G:T | W95L | 0.951 |
| 9:5022177:G:C | A64P | 0.951 |
| 9:5022189:T:C | C68R | 0.949 |
| 9:5029842:T:G | Y96D | 0.947 |
| 9:5022187:T:A | I67N | 0.943 |
| 9:5022187:T:G | I67S | 0.936 |
| 9:5029809:T:A | F85I | 0.935 |
| 9:5029786:T:G | I77S | 0.934 |
| 9:5022103:T:A | L39H | 0.929 |
| 9:5022201:T:C | S72P | 0.929 |
| 9:5022117:T:G | Y44D | 0.925 |
| 9:5029810:T:G | F85C | 0.922 |
| 9:5022103:T:G | L39R | 0.920 |
| 9:5022181:A:T | E65V | 0.914 |
| 9:5029792:C:A | P79H | 0.914 |
| 9:5022190:G:A | C68Y | 0.912 |
| 9:5029786:T:A | I77N | 0.905 |
| 9:5029786:T:C | I77T | 0.905 |
| 9:5022157:T:C | F57S | 0.904 |
| 9:5022210:T:C | C75R | 0.898 |
| 9:5022212:T:G | C75W | 0.897 |
| 9:5029809:T:G | F85V | 0.890 |
| 9:5022115:T:C | L43P | 0.888 |
| 9:5022151:T:C | L55P | 0.880 |
| 9:5022187:T:C | I67T | 0.869 |
| 9:5022202:C:A | S72Y | 0.870 |
| 9:5022202:C:T | S72F | 0.872 |
| 9:5029792:C:G | P79R | 0.857 |
| 9:5022211:G:A | C75Y | 0.856 |
| 9:5022182:A:C | E65D | 0.853 |
| 9:5022207:G:C | A74P | 0.847 |
| 9:5029820:G:A | M88I | 0.840 |
SpliceAI Predictions
Total Predictions: 4,458
TOP 50 Predicted Splice-Altering Variants (score ≥ 0.80):
| Variant ID | Effect | Delta Score |
|---|
| 9:4985465:GGGAT:G | donor_gain | 0.99 |
| 9:4985466:GGATG:G | donor_gain | 0.99 |
| 9:4985467:G:T | donor_gain | 0.99 |
| 9:4985466:GGAT:G | donor_gain | 0.98 |
| 9:4985467:GATG:G | donor_gain | 0.98 |
| 9:4985470:G:GG | donor_gain | 0.97 |
| 9:4985440:G:GT | donor_gain | 0.96 |
| 9:4985322:GC:G | donor_gain | 0.96 |
| 9:4985467:GAT:G | donor_gain | 0.94 |
| 9:4985523:T:TA | donor_gain | 0.93 |
| 9:4985262:G:GT | donor_gain | 0.90 |
| 9:4985382:C:A | donor_gain | 0.90 |
| 9:4985381:T:TA | donor_gain | 0.89 |
| 9:4985277:G:GT | donor_gain | 0.88 |
| 9:4985349:TGTTC:T | donor_gain | 0.86 |
| 9:4985350:GTTCG:G | donor_gain | 0.86 |
| 9:4985481:C:G | donor_gain | 0.85 |
| 9:4985519:G:GT | donor_gain | 0.84 |
| 9:4985296:C:G | donor_gain | 0.81 |
| 9:4985441:G:T | donor_gain | 0.81 |
| 9:4985323:C:T | donor_gain | 0.75 |
| 9:4985289:G:GT | donor_gain | 0.72 |
| 9:4985251:G:GT | donor_gain | 0.67 |
| 9:4985442:A:T | donor_gain | 0.64 |
| 9:4985524:C:CA | donor_gain | 0.62 |
| 9:4985378:C:A | donor_gain | 0.61 |
| 9:4985351:TTCGC:T | donor_gain | 0.61 |
| 9:4985467:GATGT:G | donor_loss | 0.60 |
| 9:4985468:ATGTG:A | donor_loss | 0.60 |
| 9:4985469:TG:T | donor_loss | 0.60 |
| 9:4985470:GTGA:G | donor_loss | 0.60 |
| 9:4985471:T:G | donor_loss | 0.60 |
Section 7: Biological Pathways & Gene Ontology
Reactome Pathways
Total Pathway Count: 38
| Pathway ID | Pathway Name | Disease? |
|---|
| R-HSA-9006335 | Signaling by Erythropoietin | No |
| R-HSA-9027283 | Erythropoietin activates STAT5 | No |
| R-HSA-9027284 | Erythropoietin activates RAS | No |
| R-HSA-9027276 | Erythropoietin activates PI3K | No |
| R-HSA-9027277 | Erythropoietin activates PLCG | No |
| R-HSA-877300 | Interferon gamma signaling | No |
| R-HSA-877312 | Regulation of IFNG signaling | No |
| R-HSA-9732724 | IFNG signaling activates MAPKs | No |
| R-HSA-1059683 | Interleukin-6 signaling | No |
| R-HSA-6788467 | IL-6-type cytokine receptor ligand interactions | No |
| R-HSA-512988 | Interleukin-3, Interleukin-5 and GM-CSF signaling | No |
| R-HSA-6785807 | Interleukin-4 and Interleukin-13 signaling | No |
| R-HSA-9020591 | Interleukin-12 signaling | No |
| R-HSA-8854691 | Interleukin-20 family signaling | No |
| R-HSA-9020933 | Interleukin-23 signaling | No |
| R-HSA-9020956 | Interleukin-27 signaling | No |
| R-HSA-8984722 | Interleukin-35 Signalling | No |
| R-HSA-982772 | Growth hormone receptor signaling | No |
| R-HSA-1170546 | Prolactin receptor signaling | No |
| R-HSA-2586552 | Signaling by Leptin | No |
| R-HSA-9674555 | Signaling by CSF3 (G-CSF) | No |
| R-HSA-9705462 | Inactivation of CSF3 (G-CSF) signaling | No |
| R-HSA-1433557 | Signaling by SCF-KIT | No |
| R-HSA-912526 | Interleukin receptor SHC signaling | No |
| R-HSA-69231 | Cyclin D associated events in G1 | No |
| R-HSA-110056 | MAPK3 (ERK1) activation | No |
| R-HSA-112411 | MAPK1 (ERK2) activation | No |
| R-HSA-5673000 | RAF activation | No |
| R-HSA-5673001 | RAF/MAP kinase cascade | No |
| R-HSA-3214858 | RMTs methylate histone arginines | No |
| R-HSA-983231 | Factors involved in megakaryocyte development | No |
| R-HSA-6802946 | Signaling by moderate kinase activity BRAF mutants | Yes |
| R-HSA-6802952 | Signaling by BRAF and RAF1 fusions | Yes |
| R-HSA-6802955 | Paradoxical activation of RAF signaling | Yes |
| R-HSA-9649948 | Signaling downstream of RAS mutants | Yes |
| R-HSA-9656223 | Signaling by RAF1 mutants | Yes |
| R-HSA-9670439 | Signaling by KIT mutants | Yes |
| R-HSA-9679191 | Potential therapeutics for SARS | Yes |
Gene Ontology Annotations
Total GO Terms: 130
Molecular Function (TOP 20)
| GO ID | Term |
|---|
| GO:0004672 | protein kinase activity |
| GO:0004713 | protein tyrosine kinase activity |
| GO:0004715 | non-membrane spanning protein tyrosine kinase activity |
| GO:0005102 | signaling receptor binding |
| GO:0005131 | growth hormone receptor binding |
| GO:0005143 | interleukin-12 receptor binding |
| GO:0005524 | ATP binding |
| GO:0019901 | protein kinase binding |
| GO:0020037 | heme binding |
| GO:0030546 | signaling receptor activator activity |
| GO:0031702 | type 1 angiotensin receptor binding |
| GO:0033130 | acetylcholine receptor binding |
| GO:0035401 | histone H3Y41 kinase activity |
| GO:0042169 | SH2 domain binding |
| GO:0042393 | histone binding |
| GO:0042802 | identical protein binding |
| GO:0043548 | phosphatidylinositol 3-kinase binding |
| GO:0043560 | insulin receptor substrate binding |
| GO:0046872 | metal ion binding |
| GO:0051428 | peptide hormone receptor binding |
Biological Process (TOP 20)
| GO ID | Term |
|---|
| GO:0007259 | cell surface receptor signaling pathway via JAK-STAT |
| GO:0019221 | cytokine-mediated signaling pathway |
| GO:0038162 | erythropoietin-mediated signaling pathway |
| GO:0038163 | thrombopoietin-mediated signaling pathway |
| GO:0060396 | growth hormone receptor signaling pathway |
| GO:0060397 | growth hormone receptor signaling via JAK-STAT |
| GO:0070102 | interleukin-6-mediated signaling pathway |
| GO:0035722 | interleukin-12-mediated signaling pathway |
| GO:0038155 | interleukin-23-mediated signaling pathway |
| GO:0060333 | type II interferon-mediated signaling pathway |
| GO:0042531 | positive regulation of tyrosine phosphorylation of STAT protein |
| GO:0046427 | positive regulation of receptor signaling pathway via JAK-STAT |
| GO:0042976 | activation of Janus kinase activity |
| GO:0030218 | erythrocyte differentiation |
| GO:0007165 | signal transduction |
| GO:0035556 | intracellular signal transduction |
| GO:0006955 | immune response |
| GO:0002250 | adaptive immune response |
| GO:0046777 | protein autophosphorylation |
| GO:0043410 | positive regulation of MAPK cascade |
Cellular Component (TOP 20)
| GO ID | Term |
|---|
| GO:0005634 | nucleus |
| GO:0005654 | nucleoplasm |
| GO:0005737 | cytoplasm |
| GO:0005829 | cytosol |
| GO:0005886 | plasma membrane |
| GO:0005901 | caveola |
| GO:0005925 | focal adhesion |
| GO:0009898 | cytoplasmic side of plasma membrane |
| GO:0019897 | extrinsic component of plasma membrane |
| GO:0030526 | granulocyte macrophage colony-stimulating factor receptor complex |
| GO:0031234 | extrinsic component of cytoplasmic side of plasma membrane |
| GO:0031904 | endosome lumen |
| GO:0042022 | interleukin-12 receptor complex |
| GO:0045121 | membrane raft |
| GO:0072536 | interleukin-23 receptor complex |
| GO:0098794 | postsynapse |
| GO:0098978 | glutamatergic synapse |
| GO:0000785 | chromatin |
| GO:0000791 | euchromatin |
Section 8: Protein Interactions & Molecular Networks
STRING Protein-Protein Interactions
Total Interaction Count: 5,828
TOP 50 Highest-Confidence Interacting Proteins:
| UniProt ID | Gene | Score | Description |
|---|
| P40763 | STAT3 | 999 | Signal transducer and activator of transcription 3 |
| O60674 | JAK2 | 999 | Self-interaction (homodimerization) |
| P19235 | EPOR | 997 | Erythropoietin receptor |
| P42229 | STAT5A | 997 | Signal transducer and activator of transcription 5A |
| P51692 | STAT5B | 997 | Signal transducer and activator of transcription 5B |
| O14543 | SOCS3 | 996 | Suppressor of cytokine signaling 3 |
| P42224 | STAT1 | 996 | Signal transducer and activator of transcription 1 |
| P38484 | IFG2R | 995 | Interferon gamma receptor 2 |
| O15524 | SOCS1 | 994 | Suppressor of cytokine signaling 1 |
| P15260 | IFNGR1 | 993 | Interferon gamma receptor 1 |
| P01579 | IFNG | 989 | Interferon gamma |
| P42701 | IL12RB1 | 988 | Interleukin-12 receptor subunit beta-1 |
| P10912 | GHR | 985 | Growth hormone receptor |
| Q99665 | IL12RB2 | 983 | Interleukin-12 receptor subunit beta-2 |
| P23458 | JAK1 | 982 | Tyrosine-protein kinase JAK1 |
| P29597 | TYK2 | 982 | Non-receptor tyrosine-protein kinase TYK2 |
| P78552 | IL13RA1 | 979 | Interleukin-13 receptor subunit alpha-1 |
| Q9UQQ2 | SH2B3 | 976 | SH2B adapter protein 3 (LNK) |
| P01588 | EPO | 974 | Erythropoietin |
| P09919 | CSF3 | 968 | Granulocyte colony-stimulating factor |
| P05231 | IL6 | 953 | Interleukin-6 |
| Q5VWK5 | IL23R | 953 | Interleukin-23 receptor |
| Q9NSE2 | CISH | 949 | Cytokine-inducible SH2-containing protein |
| Q06124 | PTPN11 | 947 | Tyrosine-protein phosphatase non-receptor type 11 (SHP2) |
| P08700 | IL3 | 941 | Interleukin-3 |
| Q9HC73 | CRLF2 | 941 | Cytokine receptor-like factor 2 |
| P29354 | SRC | 937 | Proto-oncogene tyrosine-protein kinase Src |
| P41159 | LEP | 936 | Leptin |
| Q9NRF2 | SOCS7 | 932 | Suppressor of cytokine signaling 7 |
| P16471 | PRLR | 919 | Prolactin receptor |
| P40225 | TPO | 919 | Thrombopoietin |
| P40189 | IL6ST | 916 | Interleukin-6 receptor subunit beta (gp130) |
| Q6N021 | SOCS4 | 906 | Suppressor of cytokine signaling 4 |
| P35568 | IRS1 | 904 | Insulin receptor substrate 1 |
| P40238 | MPL | 904 | Thrombopoietin receptor |
| P48357 | LEPR | 904 | Leptin receptor |
| Q99062 | CSF2RB | 888 | Cytokine receptor common subunit beta |
| P42226 | STAT6 | 883 | Signal transducer and activator of transcription 6 |
| Q8IXJ9 | SOCS5 | 873 | Suppressor of cytokine signaling 5 |
| P52630 | STAT2 | 871 | Signal transducer and activator of transcription 2 |
| P01236 | PRL | 868 | Prolactin |
| P29353 | SHC1 | 859 | SHC-transforming protein 1 |
| P04141 | CSF2 | 851 | Granulocyte-macrophage colony-stimulating factor |
| P18031 | PTPN1 | 849 | Tyrosine-protein phosphatase non-receptor type 1 (PTP1B) |
| P22301 | IL10 | 833 | Interleukin-10 |
| P01343 | GH | 826 | Growth hormone |
| P05113 | IL5 | 823 | Interleukin-5 |
| P42702 | LIFR | 813 | Leukemia inhibitory factor receptor |
| P12931 | SRC | 809 | Proto-oncogene tyrosine-protein kinase Src |
| P41212 | ETV6 | 800 | Transcription factor ETV6 |
BioGRID Physical Interactions
Total Interactions: 277+
Key Interactors by Experimental Method:
| Interactor | Method |
|---|
| STAT3 | Biochemical Activity, Affinity Capture-Western |
| STAT5A | Two-hybrid, Reconstituted Complex |
| STAT5B | Two-hybrid |
| SOCS1 | Two-hybrid, Affinity Capture-Western, Reconstituted Complex |
| SOCS3 | Two-hybrid, Affinity Capture-Western, Reconstituted Complex |
| EPOR | Affinity Capture-Western |
| IL12RB2 | Affinity Capture-Western |
| PIK3R1 | Negative Genetic, Affinity Capture-Western, Reconstituted Complex |
| CBL | Affinity Capture-Western, Co-localization, Reconstituted Complex |
| EGFR | Biochemical Activity, Affinity Capture-Western |
| SH2B1 | Affinity Capture-Western |
| SH2B2 | Biochemical Activity |
| IRS1 | Affinity Capture-Western, Biochemical Activity |
| PTPN11 | Biochemical Activity, Reconstituted Complex |
| PTPN6 | Affinity Capture-Western |
| PTPN12 | Affinity Capture-Western |
| VAV1 | Affinity Capture-Western, Biochemical Activity |
| GRB2 | Affinity Capture-Western |
| CSF2RB | Reconstituted Complex |
Protein Similarity
ESM2 Structural/Embedding Similarity
Total Similar Proteins: 148
TOP 20 Most Similar (Human Proteins):
| UniProt ID | Gene | Top Similarity | Avg Similarity |
|---|
| O60674 | JAK2 | 1.000 | 0.990 |
| P23458 | JAK1 | 0.9999 | 0.989 |
| P52332 | JAK3 | 0.9999 | 0.989 |
| O60880 | SH2 domain-containing protein 1A | 1.000 | 0.975 |
| Q13418 | Integrin-linked protein kinase | 1.000 | 0.985 |
| P29597 | TYK2 | 0.9998 | 0.991 |
DIAMOND Sequence Similarity
Total Homologs: 19
| UniProt ID | Gene | Identity (%) | Bitscore |
|---|
| O60674 | JAK2 (human) | 99.7% | 2316 |
| Q5RB23 | JAK2 (macaque) | 99.7% | 2315 |
| Q62689 | Jak2 (rat) | 98.1% | 2284 |
| Q62120 | Jak2 (mouse) | 98.1% | 2279 |
| O19064 | JAK2 (bovine) | 95.3% | 2239 |
| P23458 | JAK1 (human) | 93.7% | 2192 |
| P52332 | JAK3 (human) | 93.7% | 2181 |
| Q62137 | Jak1 (mouse) | 94.3% | 2124 |
| Q63272 | Jak1 (rat) | 94.3% | 2127 |
| Q75R65 | JAK2 (rabbit) | 88.1% | 2064 |
| Q09178 | JAK2 (chicken) | 86.8% | 2028 |
| O12990 | JAK2 (zebrafish) | 86.8% | 2028 |
| P29597 | TYK2 (human) | 79.8% | 1921 |
| Q9R117 | Tyk2 (mouse) | 79.8% | 1917 |
| P52333 | JAK3 (mouse) | 83.7% | 1868 |
Section 9: Transcription Factor Regulatory Data
Note: JAK2 is NOT a transcription factor. However, it regulates transcription factors (STATs) through phosphorylation.
Downstream Targets (Genes regulated BY JAK2 signaling)
JAK2 phosphorylates and activates STAT transcription factors, which then regulate:
- JAK2 → MYC (Activation) - CollecTRI evidence
Upstream Regulators (TFs that regulate JAK2 expression)
Total: 17 TF-JAK2 regulatory interactions (CollecTRI)
| TF Gene | Regulation Type | Confidence |
|---|
| STAT5A | Unknown | High |
| STAT5B | Unknown | High |
| TXK | Unknown | High |
| YY1 | Unknown | High |
| STAT1 | Activation | Low |
| STAT3 | Activation | - |
| DENR | Activation | - |
| AR | Unknown | Low |
| BRCA1 | Unknown | - |
| DNMT1 | Unknown | Low |
| ESR1 | Unknown | - |
| LMO2 | Unknown | Low |
| SPI1 | Unknown | Low |
| TCF3 | Unknown | Low |
| THAP11 | Unknown | Low |
| TP53 | Unknown | - |
DNA Binding Profiles
JAK2 does not directly bind DNA. It acts through phosphorylation of STAT proteins which then translocate to the nucleus and bind DNA.
Section 10: Drug & Pharmacology Data
ChEMBL Target Information
| Target ID | Type | Description |
|---|
| CHEMBL2971 | SINGLE PROTEIN | Tyrosine-protein kinase JAK2 |
| CHEMBL2363062 | PROTEIN FAMILY | Janus Kinase (JAK) |
| CHEMBL3038492 | PROTEIN COMPLEX | JAK2/JAK1 |
| CHEMBL3301390 | PROTEIN COMPLEX | JAK1/JAK2/TYK2 |
| CHEMBL3301392 | PROTEIN COMPLEX | JAK2/TYK2 |
| CHEMBL4802035 | PROTEIN FAMILY | JAK2/JAK3 |
| CHEMBL5482983 | PROTEIN COMPLEX | JAK2-STAT3 |
| CHEMBL4630750 | PPI | E3 ubiquitin-protein ligase XIAP/JAK2 |
| CHEMBL4742263 | PPI | Protein cereblon/JAK2 |
Approved Drugs (Phase 4) Targeting JAK2
Total: 30+ approved drugs
| ChEMBL ID | Drug Name | Mechanism |
|---|
| CHEMBL1789941 | RUXOLITINIB | JAK1/JAK2 inhibitor |
| CHEMBL1795071 | RUXOLITINIB PHOSPHATE | JAK1/JAK2 inhibitor |
| CHEMBL1287853 | FEDRATINIB | JAK2 inhibitor |
| CHEMBL2035187 | PACRITINIB | JAK2/FLT3 inhibitor |
| CHEMBL1078178 | MOMELOTINIB | JAK1/JAK2 inhibitor |
| CHEMBL2105759 | BARICITINIB | JAK1/JAK2 inhibitor |
| CHEMBL221959 | TOFACITINIB | Pan-JAK inhibitor |
| CHEMBL2103743 | TOFACITINIB CITRATE | Pan-JAK inhibitor |
| CHEMBL3301607 | FILGOTINIB | JAK1 selective |
| CHEMBL3622821 | UPADACITINIB | JAK1 selective |
| CHEMBL3655081 | ABROCITINIB | JAK1 selective |
| CHEMBL3137308 | PEFICITINIB | Pan-JAK inhibitor |
| CHEMBL4435170 | DEUCRAVACITINIB | TYK2 selective |
| CHEMBL4596392 | CRAVACITINIB | JAK inhibitor |
| CHEMBL1171837 | PONATINIB | Multi-kinase inhibitor |
| CHEMBL1289926 | AXITINIB | Multi-kinase inhibitor |
| CHEMBL288441 | BOSUTINIB | Multi-kinase inhibitor |
| CHEMBL535 | SUNITINIB | Multi-kinase inhibitor |
| CHEMBL553 | ERLOTINIB | Multi-kinase inhibitor |
| CHEMBL601719 | CRIZOTINIB | Multi-kinase inhibitor |
| CHEMBL477772 | PAZOPANIB | Multi-kinase inhibitor |
| CHEMBL502835 | NINTEDANIB | Multi-kinase inhibitor |
| CHEMBL2028663 | DABRAFENIB | Multi-kinase inhibitor |
| CHEMBL2403108 | CERITINIB | Multi-kinase inhibitor |
| CHEMBL3286830 | LORLATINIB | Multi-kinase inhibitor |
| CHEMBL3545311 | BRIGATINIB | Multi-kinase inhibitor |
| CHEMBL1983268 | ENTRECTINIB | Multi-kinase inhibitor |
| CHEMBL4298138 | REPOTRECTINIB | Multi-kinase inhibitor |
| CHEMBL4582651 | PRALSETINIB | Multi-kinase inhibitor |
| CHEMBL608533 | MIDOSTAURIN | Multi-kinase inhibitor |
Phase 3 Clinical Candidates
| ChEMBL ID | Drug Name |
|---|
| CHEMBL3622820 | ITACITINIB |
| CHEMBL4297477 | BREPOCITINIB |
| CHEMBL4297507 | DELGOCITINIB |
| CHEMBL4297865 | ABIVERTINIB |
| CHEMBL5095079 | POVORCITINIB |
| CHEMBL5095398 | IVARMACITINIB |
| CHEMBL3137331 | DEFACTINIB |
| CHEMBL3265032 | ENTOSPLETINIB |
| CHEMBL428690 | ALVOCIDIB |
| CHEMBL522892 | DOVITINIB |
| CHEMBL603469 | LESTAURTINIB |
PharmGKB Information
| Attribute | Value |
|---|
| PharmGKB ID | PA29989 |
| VIP Gene | Yes (Very Important Pharmacogene) |
| Has Variant Annotations | Yes |
| CPIC Guideline | No |
Section 11: Expression Profiles
Bgee Expression Summary
| Attribute | Value |
|---|
| Expression Breadth | Ubiquitous |
| Total Present Calls | 272 |
| Maximum Expression Score | 97.19 |
TOP 30 Tissues by Expression Score
| Tissue | Expression Score | Quality |
|---|
| Calcaneal tendon | 97.19 | Gold |
| Monocyte | 95.57 | Gold |
| Blood vessel layer | 94.99 | Gold |
| Mononuclear cell | 94.89 | Gold |
| Popliteal artery | 94.48 | Gold |
| Tibial artery | 94.46 | Gold |
| Leukocyte | 94.32 | Gold |
| Aorta | 92.96 | Gold |
| Gluteal muscle | 92.86 | Gold |
| Descending thoracic aorta | 92.19 | Gold |
| Thoracic aorta | 91.14 | Gold |
| Ascending aorta | 90.99 | Gold |
| Sural nerve | 90.43 | Gold |
| Tibia | 89.72 | Gold |
| Left coronary artery | 89.40 | Gold |
| Skeletal muscle tissue of rectus abdominis | 89.12 | Gold |
| Right coronary artery | 87.93 | Gold |
| Coronary artery | 87.70 | Gold |
| Bone marrow cell | 87.64 | Gold |
| Tendon | 86.88 | Gold |
| Cartilage tissue | 86.61 | Gold |
| Superficial temporal artery | 86.60 | Gold |
| Right lung | 86.52 | Gold |
| Diaphragm | 86.09 | Gold |
| Biceps brachii | 85.65 | Gold |
| Bone marrow | 85.35 | Gold |
| Skin of leg | 85.15 | Gold |
| Ectocervix | 84.92 | Gold |
| Vermiform appendix | 84.88 | Gold |
| Subcutaneous adipose tissue | 84.88 | Gold |
TOP 30 Cell Types by Expression
| Cell Type | Expression Score | Quality |
|---|
| Monocyte | 95.57 | Gold |
| Mononuclear cell | 94.89 | Gold |
| Leukocyte | 94.32 | Gold |
| Bone marrow cell | 87.64 | Gold |
| Granulocyte | 84.34 | Gold |
| Buccal mucosa cell | 83.79 | Silver |
| Secondary oocyte | 82.87 | Gold |
| Male germ line stem cell in testis | 80.62 | Gold |
| Stromal cell of endometrium | 80.39 | Gold |
| Primordial germ cell in gonad | 78.20 | Gold |
Expression Patterns
| - Hematopoietic System | - Vascular System | - Musculoskeletal | - Ubiquitous |
|---|
| Highest expression in monocytes, leukocytes, bone marrow cells | High expression in arteries (aorta, coronary, tibial) | Present in skeletal muscle, tendons, cartilage | Detected in 272 different anatomical structures | |
| | | | Disease Associations** |
GenCC Gene-Disease Associations
| Disease | Classification | Inheritance | Source |
|---|
| Thrombocythemia 3 (OMIM:614521) | Strong | Autosomal dominant | Genomics England PanelApp |
| Thrombocythemia 3 (OMIM:614521) | Strong | Autosomal dominant | Labcorp Genetics |
| Familial thrombocytosis (ORPHANET:71493) | Supportive | Autosomal dominant | Orphanet |
Orphanet Disease Associations
Total: 6 diseases
| Orphanet ID | Disease Name | Type | Gene Count |
|---|
| 729 | Polycythemia vera | Disease | 1 |
| 824 | Primary myelofibrosis | Disease | 4 |
| 3318 | Essential thrombocythemia | Disease | 6 |
| 71493 | Familial thrombocytosis | Disease | 3 |
| 131 | Budd-Chiari syndrome | Disease | 3 |
| 667662 | Breast implant-associated ALCL | Disease | 7 |
HPO Phenotype Associations
Total: 125 phenotypes
TOP 50 Clinical Phenotypes:
| HPO ID | Phenotype |
|---|
| HP:0001894 | Thrombocytosis |
| HP:0001901 | Polycythemia |
| HP:0001898 | Increased red blood cell mass |
| HP:0001899 | Increased hematocrit |
| HP:0001900 | Increased circulating hemoglobin |
| HP:0005547 | Myeloproliferative disorder |
| HP:0011974 | Myelofibrosis |
| HP:0001978 | Extramedullary hematopoiesis |
| HP:0005513 | Increased megakaryocyte count |
| HP:0031020 | Bone marrow hypercellularity |
| HP:0001744 | Splenomegaly |
| HP:0002240 | Hepatomegaly |
| HP:0001433 | Hepatosplenomegaly |
| HP:0001907 | Thromboembolism |
| HP:0001977 | Abnormal thrombosis |
| HP:0004420 | Arterial thrombosis |
| HP:0004936 | Venous thrombosis |
| HP:0030242 | Portal vein thrombosis |
| HP:0030243 | Hepatic vein thrombosis |
| HP:0002639 | Budd-Chiari syndrome |
| HP:0001297 | Stroke |
| HP:0002140 | Ischemic stroke |
| HP:0002326 | Transient ischemic attack |
| HP:0002637 | Cerebral ischemia |
| HP:0001342 | Cerebral hemorrhage |
| HP:0001658 | Myocardial infarction |
| HP:0001681 | Angina pectoris |
| HP:0002204 | Pulmonary embolism |
| HP:0032147 | Erythromelalgia |
| HP:0000989 | Pruritus |
| HP:0001892 | Abnormal bleeding |
| HP:0000978 | Bruising susceptibility |
| HP:0000967 | Petechiae |
| HP:0000979 | Purpura |
| HP:0031364 | Ecchymosis |
| HP:0003010 | Prolonged bleeding time |
| HP:0002239 | Gastrointestinal hemorrhage |
| HP:0000421 | Epistaxis |
| HP:0000225 | Gingival bleeding |
| HP:0012378 | Fatigue |
| HP:0003388 | Easy fatigability |
| HP:0001824 | Weight loss |
| HP:0001945 | Fever |
| HP:0011134 | Low-grade fever |
| HP:0002315 | Headache |
| HP:0002076 | Migraine |
| HP:0002321 | Vertigo |
| HP:0000360 | Tinnitus |
| HP:0002027 | Abdominal pain |
| HP:0033842 | Early satiety |
GWAS Associations
Total: 57 GWAS associations
TOP 30 GWAS Traits:
| GWAS Study | Trait | P-value |
|---|
| GCST90000032_10 | Myeloproliferative neoplasms | 3×10⁻¹²⁸ |
| GCST90002402_169 | Platelet count | 1×10⁻¹¹² |
| GCST90002400_50 | Plateletcrit | 1×10⁻¹²⁰ |
| GCST001725_99 | Inflammatory bowel disease | 8×10⁻⁴⁵ |
| GCST90002381_32 | Eosinophil count | 2×10⁻⁴³ |
| GCST90002382_244 | Eosinophil percentage | 2×10⁻³⁶ |
| GCST90002400_1 | Plateletcrit | 6×10⁻³⁶ |
| GCST90002402_170 | Platelet count | 8×10⁻³⁴ |
| GCST90002402_171 | Platelet count | 3×10⁻²⁸ |
| GCST000964_38 | Ulcerative colitis | 2×10⁻²⁵ |
| GCST90002400_2 | Plateletcrit | 6×10⁻²⁴ |
| GCST000357_1 | Myeloproliferative neoplasms | 4×10⁻²⁰ |
| GCST006611_31 | HDL cholesterol | 1×10⁻¹⁹ |
| GCST006614_83 | Total cholesterol | 1×10⁻¹⁸ |
| GCST003622_69 | Systemic lupus erythematosus | 2×10⁻¹⁷ |
| GCST90002403_56 | Red blood cell count | 1×10⁻¹⁶ |
| GCST004606_23 | Eosinophil count | 4×10⁻¹⁶ |
| GCST90002390_346 | Mean corpuscular hemoglobin | 1×10⁻¹⁴ |
| GCST003622_59 | Systemic lupus erythematosus | 4×10⁻¹⁴ |
| GCST90002381_33 | Eosinophil count | 3×10⁻¹⁴ |
| GCST006612_80 | LDL cholesterol | 9×10⁻¹⁴ |
| GCST90002392_60 | Mean corpuscular volume | 2×10⁻¹³ |
| GCST000879_49 | Crohn's disease | 1×10⁻¹³ |
| GCST90002398_495 | Neutrophil count | 2×10⁻¹² |
| GCST90002407_32 | White blood cell count | 7×10⁻¹² |
| GCST009465_3 | Platelet count | 3×10⁻¹² |
| GCST002840_1 | Myeloproliferative neoplasms | 1×10⁻¹⁰ |
| GCST90002394_561 | Monocyte percentage | 2×10⁻¹⁰ |
| GCST005038_19 | Allergic disease | 3×10⁻¹⁰ |
| GCST000207_17 | Crohn's disease | 3×10⁻⁹ |
DATA SUMMARY
| Category | Count |
|---|
| Ensembl Transcripts | 15 |
| RefSeq mRNA | 7 |
| Exons (canonical) | 25 |
| UniProt Entries | 1 (reviewed) |
| InterPro Domains | 23 |
| PDB Structures | 164+ |
| Orthologs | 4 (mouse, rat, zebrafish x2) |
| Paralogs | 32 |
| ClinVar Variants | 33+ |
| AlphaMissense Predictions | 7,572 |
| SpliceAI Predictions | 4,458 |
| Reactome Pathways | 38 |
| GO Terms | 130 |
| STRING Interactions | 5,828 |
| BioGRID Interactions | 277+ |
| Approved Drugs (Phase 4) | 30+ |
| Phase 3 Candidates | 11 |
| HPO Phenotypes | 125 |
| GWAS Associations | 57 |
| Orphanet Diseases | 6 |
Data Sources: HGNC, Ensembl, NCBI Entrez, OMIM, UniProt, RefSeq, InterPro, PDB, AlphaFold, ClinVar, AlphaMissense, SpliceAI, Reactome, Gene Ontology, STRING, BioGRID, ChEMBL, PharmGKB, Bgee,
Orphanet, HPO, GWAS Catalog, GenCC, CollecTRI
Reference Date: March 2026
I have compiled a comprehensive cross-database identifier and functional mapping reference for human JAK2 covering all 12 requested sections. Key highlights:
Gene: JAK2 is located at chromosome 9p24.1, spanning ~145 kb with 15 transcripts and 25 exons in the canonical isoform.
Protein: The 1,132 amino acid tyrosine kinase contains FERM, SH2, pseudokinase (JH2), and kinase (JH1) domains, with 164+ experimental crystal structures in PDB—one of the most structurally
characterized kinases.
Clinical Significance: JAK2 is causally linked to myeloproliferative neoplasms including polycythemia vera, essential thrombocythemia, and primary myelofibrosis. The V617F mutation is the hallmark
somatic driver mutation.
Drug Targeting: JAK2 is targeted by 30+ approved drugs including ruxolitinib, fedratinib, pacritinib, and momelotinib—all FDA-approved for myeloproliferative neoplasms. It is designated a PharmGKB
VIP (Very Important Pharmacogene).
Variant Predictions: 7,572 AlphaMissense predictions and 4,458 SpliceAI predictions provide comprehensive variant effect annotations.
Expression: Ubiquitously expressed with highest levels in hematopoietic cells (monocytes, leukocytes, bone marrow) and vascular tissue.