FGFR1 Gene Complete Identifier and Functional Mapping Reference

Provide a comprehensive cross-database identifier and functional mapping reference for human FGFR1 — a definitive lookup resource covering: ### …

Provide a comprehensive cross-database identifier and functional mapping reference for human FGFR1 — a definitive lookup resource covering: ### Section 1: Gene identifiers For human gene FGFR1, list ALL gene-level database identifiers. Required: - HGNC ID and approved symbol - Ensembl gene ID (ENSG...) - NCBI Entrez Gene ID - OMIM gene/locus ID - Genomic location: chromosome, start position, end position, strand (GRCh38) ### Section 2: Transcript identifiers For human gene FGFR1, list ALL transcript-level identifiers. Required: - Ensembl transcripts: ALL ENST IDs with biotype. Total count. - RefSeq transcripts: ALL NM_ mRNA accessions. Mark which is MANE Select. - CCDS IDs. - For the CANONICAL/MANE SELECT transcript: ALL exon IDs (ENSE) with genomic coordinates and total exon count. ### Section 3: Protein identifiers For human gene FGFR1 protein product(s), list ALL protein-level identifiers. Required: - UniProt accessions: ALL entries (reviewed and unreviewed). Mark the canonical reviewed entry. - RefSeq protein: ALL NP_ accessions. - Protein domains and families: list ALL annotated domains/families with identifiers, including name, type (domain/family/superfamily), and ID. - Antibody availability: known antibody resources for the protein. ### Section 4: Structure For human gene FGFR1 protein, list ALL structural data. Required: - Experimental structures: ALL PDB IDs. For each: experimental method (X-ray/NMR/Cryo-EM) and resolution. Total count. - Predicted structures: AlphaFold model ID and confidence metrics (pLDDT). ### Section 5: Cross-species orthologs For human gene FGFR1, list orthologous genes in key model organisms. Organisms: - Mouse (Mus musculus): gene ID, symbol - Rat (Rattus norvegicus): gene ID, symbol - Zebrafish (Danio rerio): gene ID, symbol - Fruit fly (Drosophila melanogaster): gene ID, symbol - Worm (C. elegans): gene ID, symbol - Yeast (S. cerevisiae): gene ID, symbol ### Section 6: Clinical variants & AI predictions For human gene FGFR1, summarize clinical variants and AI predictions. Clinical variant annotations (ClinVar): - Total variant count (approximate is fine) - Breakdown by classification: Pathogenic, Likely Pathogenic, VUS, Likely Benign, Benign - TOP 30 pathogenic/likely pathogenic variants with: variant ID, HGVS notation, associated condition AI-based variant effect predictions: - Splice effect predictions: total count + TOP 30 with delta scores if known - Missense pathogenicity from AlphaMissense — total count + TOP 30 likely-pathogenic with am_pathogenicity scores. ### Section 7: Pathways & Gene Ontology For human gene FGFR1, list biological pathways and Gene Ontology annotations. Pathway membership: - ALL biological pathways this gene participates in, with pathway IDs and names - Total pathway count Gene Ontology: - Biological Process: count and TOP 20 terms with GO IDs - Molecular Function: count and TOP 20 terms with GO IDs - Cellular Component: count and TOP 20 terms with GO IDs ### Section 8: Protein interactions & networks For human gene FGFR1 protein, summarize protein interactions and networks. Protein-protein interactions (STRING, IntAct, BioGRID, etc.): - Total interaction count (approximate) - TOP 30 highest-confidence interacting proteins with scores/evidence Protein similarity: - Structural/embedding similarity (e.g. Foldseek, ESM): TOP 20 similar proteins with scores - Sequence homology: TOP 20 homologous proteins with identity/similarity ### Section 9: Transcription factor regulatory data For human gene FGFR1, summarize transcription factor regulatory data. If FGFR1 is a transcription factor: - Downstream targets: total count + TOP 30 with regulation type (activates/represses) and evidence - DNA binding motifs from JASPAR — all known motif IDs and motif family classification. Regardless: - Upstream regulators: TFs that regulate FGFR1 — names with evidence type (ChIP-seq / predicted / experimentally validated) If FGFR1 is not a transcription factor, say so briefly and skip the downstream/motif sections. ### Section 10: Drug & pharmacology data For human gene FGFR1 protein as a drug target, summarize pharmacology data. If FGFR1 is a known drug target: - Targeting molecules: total count in ChEMBL/DrugBank + TOP 30 by development phase (molecule ID, name, mechanism, highest phase) - Clinical trials: TOP 20 involving drugs targeting this gene — trial ID, phase, status, intervention - Pharmacogenomics: known drug-gene interactions affecting drug response + dosing guidelines if any If FGFR1 is not currently a drug target, say so briefly. ### Section 11: Expression profiles For human gene FGFR1, summarize expression profiles. Tissue expression (GTEx, HPA, Bgee, etc.): - TOP 30 tissues with expression scores/levels (direction, units if known) - Note tissue-specific or tissue-enriched patterns Cell type expression (Tabula Sapiens, HCA, etc.): - TOP 30 cell types with expression scores - Note cell-type-specific patterns Single-cell expression: notable datasets or cell populations of interest for this gene. ### Section 12: Disease associations For human gene FGFR1, summarize disease associations. Mendelian / monogenic disease: - Diseases caused by mutations in FGFR1: disease name, disease ID (OMIM/Orphanet/Mondo), inheritance pattern, evidence level - Include all directly linked conditions Phenotype associations: - Clinical phenotypes associated with the gene (HPO terms where known) - TOP 30 phenotype terms with HPO IDs Complex-disease / GWAS: - Traits and diseases significantly associated via GWAS: trait name, variant, effect size, study where known - TOP 30 GWAS associations

FGFR1

Executive summary

FGFR1 (fibroblast growth factor receptor 1; HGNC:3688) is a receptor tyrosine kinase on chromosome 8 that transduces FGF signals into core intracellular cascades — PI3K/AKT, RAS/ERK-MAPK, and PLC-γ1 — making it a central regulator of embryonic development, angiogenesis, skeletal morphogenesis, and neurogenesis. Four key facts stand out for researchers: first, the gene is expressed in virtually every human tissue (present calls in 292 of 294 conditions, Bgee), with particularly high scores in vascular, cerebellar, and reproductive tissues. Second, it is a well-validated oncology drug target with 4,055 molecules in ChEMBL and approved therapies including sorafenib and infigratinib. Third, Mendelian mutations cause a spectrum of definitive disorders — notably Pfeiffer syndrome (craniosynostosis) and hypogonadotropic hypogonadism 2 / Kallmann syndrome — while GWAS signals link the locus to birth weight, PR interval, type 2 diabetes, and psychiatric conditions. Fourth, AlphaMissense flags ~100 missense variants as likely pathogenic, clustering around residues L754, D755, Y766, and F796 in the kinase domain.

FGFR1 — Reference

Cross-database identifier and functional mapping reference for FGFR1.

Gene identifiers

FieldValue
HGNC IDHGNC:3688
Approved symbolFGFR1
Ensembl gene IDENSG00000077782
Entrez Gene ID2260
OMIM gene ID136350
Chromosome (GRCh38)8
Start position (GRCh38)38,400,215
End position (GRCh38)38,468,834
Strand (GRCh38)− (minus)

Transcript identifiers

Ensembl Transcripts (ENST)

Total: 73 transcripts

BiotypeCountTranscript IDs
protein_coding38ENST00000326324, ENST00000335922, ENST00000341462, ENST00000356207, ENST00000397091, ENST00000397103, ENST00000397108, ENST00000397113, ENST00000413133, ENST00000425967, ENST00000434187, ENST00000440174, ENST00000447712, ENST00000525001, ENST00000526742, ENST00000529552, ENST00000530568, ENST00000532791, ENST00000533668, ENST00000683765, ENST00000683815, ENST00000684654, ENST00000703405, ENST00000857933, ENST00000857934, ENST00000857935, ENST00000857936, ENST00000857937, ENST00000857938, ENST00000857939, ENST00000857940, ENST00000934569, ENST00000934570, ENST00000934571, ENST00000934572, ENST00000934573, ENST00000965843, ENST00000965844
retained_intron21ENST00000397090, ENST00000464163, ENST00000466021, ENST00000470826, ENST00000474970, ENST00000475621, ENST00000496296, ENST00000524528, ENST00000526570, ENST00000527114, ENST00000527745, ENST00000532386, ENST00000533619, ENST00000674217, ENST00000674474, ENST00000682398, ENST00000682770, ENST00000683132, ENST00000683276, ENST00000683795, ENST00000683948
nonsense_mediated_decay8ENST00000484370, ENST00000487647, ENST00000531196, ENST00000619564, ENST00000649678, ENST00000674189, ENST00000674235, ENST00000674380
protein_coding_CDS_not_defined6ENST00000480571, ENST00000496629, ENST00000526688, ENST00000527203, ENST00000530701, ENST00000533301

RefSeq mRNA Transcripts (NM_)

Total: 20 mRNA accessions

AccessionMANE Select
NM_001079908No
NM_001079909No
NM_001174063No
NM_001174064No
NM_001174065No
NM_001174066No
NM_001174067No
NM_001354367No
NM_001354368No
NM_001354369No
NM_001354370No
NM_001393766No
NM_001410922No
NM_010206No
NM_015850No
NM_023105No
NM_023106No
NM_023110Yes
NM_024146No

CCDS Identifiers

Total: 9 CCDS IDs

  • CCDS6107
  • CCDS43730
  • CCDS43731
  • CCDS43732
  • CCDS55221
  • CCDS55222
  • CCDS94283
  • CCDS94284
  • CCDS94285

MANE Select/Canonical Transcript Exons

Transcript: ENST00000447712 (NM_023110)
Total exons: 18

Exon IDGenomic StartGenomic EndStrand
ENSE0000131631538,429,68238,429,948-
ENSE0000163031438,411,14338,413,804-
ENSE0000191186538,467,98138,468,635-
ENSE0000348976338,418,22838,418,373-
ENSE0000350116738,424,50938,424,699-
ENSE0000351041838,421,79738,421,941-
ENSE0000352301038,415,87038,416,060-
ENSE0000352838938,419,53338,419,735-
ENSE0000355164338,428,34638,428,435-
ENSE0000357637838,414,77938,414,901-
ENSE0000359747538,414,55938,414,629-
ENSE0000361078838,457,35638,457,534-
ENSE0000361133738,413,91838,414,023-
ENSE0000361425038,427,92138,428,093-
ENSE0000361494638,417,87038,417,991-
ENSE0000364407138,417,30638,417,416-
ENSE0000368091138,414,15238,414,289-
ENSE0000368394838,426,12238,426,245-

Protein identifiers

UniProt accessions

  • P11362 (reviewed, canonical) — Fibroblast growth factor receptor 1, Homo sapiens, 822 aa

RefSeq protein (NP_ accessions)

Canonical (MANE SELECT):

  • NP_075598 — from NM_023110.3

Additional human isoforms:

  • NP_075593 — from NM_023105
  • NP_075594 — from NM_023106
  • NP_056934 — from NM_015850
  • NP_001167534 — from NM_001174063
  • NP_001167535 — from NM_001174064
  • NP_001167536 — from NM_001174065
  • NP_001167537 — from NM_001174066
  • NP_001167538 — from NM_001174067
  • NP_001341296 — from NM_001354367
  • NP_001341297 — from NM_001354368
  • NP_001341298 — from NM_001354369
  • NP_001341299 — from NM_001354370
  • NP_001397851 — from NM_001410922

Protein domains and families

InterPro domains (16 total):

IDNameType
IPR000719Protein kinase domainDomain
IPR001245Ser-Thr/Tyr kinase catalytic domainDomain
IPR003598Ig sub2Domain
IPR003599Ig subDomain
IPR007110Ig-like domainDomain
IPR008266Tyrosine kinase active siteActive site
IPR011009Kinase-like domain superfamilyHomologous superfamily
IPR013098Ig I-setDomain
IPR013151Immunoglobulin-like beta-sandwich domainDomain
IPR013783Ig-like foldHomologous superfamily
IPR016248Fibroblast growth factor receptor familyFamily
IPR017441Protein kinase ATP binding siteBinding site
IPR020635Tyrosine kinase catalytic domainDomain
IPR028174Fibroblast growth factor receptor 1, catalytic domainDomain
IPR036179Ig-like domain superfamilyHomologous superfamily
IPR050122Receptor Tyrosine KinaseFamily

Pfam domains (3 total):

  • PF00047
  • PF07679
  • PF07714

Antibody availability

No antibody entries found in biobtree for FGFR1 (chain »uniprot»antibody yielded no results).

Structure

Experimental Structures: 81 PDB Entries

X-ray Diffraction (77 structures)

PDB IDResolution (Å)
1AGW2.4
1CVS2.8
1EVT2.8
1FGI2.5
1FGK2.0
1FQ93.0
2FGI2.5
3C4F2.07
3DPK1.95
3GQI2.5
3GQL2.8
3JS22.2
3KRJ2.1
3KRL2.4
3KXX3.2
3KY22.7
3OJV2.6
3RHX2.01
3TT02.8
4F632.55
4F642.05
4F652.26
4NK92.57
4NKA2.19
4NKS2.5
4RWI2.292
4RWJ2.489
4RWK2.982
4RWL2.193
4UWB2.31
4UWC1.96
4UWY2.305
4V012.33
4V042.12
4V052.57
4WUN1.65
4ZSA2.0
5A462.63
5A4C2.09
5AM61.96
5AM71.957
5B7V2.15
5EW81.63
5FLF2.58
5O491.91
5O4A2.01
5UQ02.3
5UR12.2
5VND2.2
5W213.0
5W592.498
5Z0S2.45
5ZV22.86
6C182.3
6C192.12
6C1B2.0
6C1C2.15
6C1O2.29
6ITJ1.994
6MZQ2.0
6MZW2.2
6NVL2.7
6P682.9
6P692.2
7OZB1.71
7OZD1.82
7OZF1.82
7TNH2.7
7WCL2.495
8JMZ1.988
8XLO2.36
8XZ71.75
8Y222.792
8YKI2.79
9CD52.939
9UHC1.88
9UHI1.76

NMR Spectroscopy (2 structures)

  • 1XR0
  • 2CR3

Cryo-EM (2 structures)

  • 7YSH (2.74 Å)
  • 8JQI (4.1 Å)

Total Experimental Structures: 81

Predicted Structures

AlphaFold Database

  • Model ID: AF-P11362-F1
  • Global pLDDT: 74.30
  • Residues with high confidence (pLDDT ≥ 90): 34%

Cross-species orthologs

OrganismGene IDSymbol
Mouse (Mus musculus)14182Fgfr1
Rat (Rattus norvegicus)79114Fgfr1
Zebrafish (Danio rerio)30705fgfr1a
Fruit fly (Drosophila melanogaster)39564btl
Worm (C. elegans)181291egl-15
Yeast (S. cerevisiae)nonenone

Clinical variants & AI predictions

ClinVar variants

Summary: ~1,366 total variants | Classification breakdown (first 100): Benign/Likely benign: ~45% | Uncertain significance: ~20% | Conflicting classifications: ~8% | Likely pathogenic: ~2% | Pathogenic: ~3%

TOP pathogenic/likely pathogenic variants (30):

ClinVar IDHGVS notationClassificationAssociated condition
1074220NM_023110.3(FGFR1):c.979_983del (p.His327fs)Pathogenic
1184446NM_023110.3(FGFR1):c.2122G>T (p.Glu708Ter)Pathogenic
1208776NM_023110.3(FGFR1):c.962_963del (p.Lys321fs)Pathogenic
1065343NM_023110.3(FGFR1):c.745+2T>ALikely pathogenic
1212943NM_023110.3(FGFR1):c.1936C>T (p.Arg646Trp)Likely pathogenicNot provided

AI-based predictions

Splice effects (SpliceAI): ~5,160 total variants

TOP 30 splice variants (highest delta scores):

VariantEffect typeDelta scoreGene(s)
1:152314746:TT:Tacceptor_gain0.99FLG, CCDST
1:152314750:G:GCacceptor_gain0.96FLG, CCDST
1:152314748:C:CCacceptor_gain0.98FLG, CCDST
1:152314750:G:Cacceptor_gain0.98FLG, CCDST
1:152314753:C:CTacceptor_gain0.98FLG, CCDST
1:152314776:C:CCacceptor_gain0.98FLG, CCDST
1:152314754:A:Tacceptor_gain0.98FLG, CCDST
1:152314745:ATTCT:Aacceptor_loss0.98FLG, CCDST
1:152314747:TC:Tacceptor_loss0.98FLG, CCDST
1:152314748:C:Tacceptor_loss0.98FLG, CCDST
1:152314743:GGATT:Gacceptor_gain0.93FLG, CCDST
1:152314744:GATT:Gacceptor_gain0.93FLG, CCDST
1:152314745:ATTC:Aacceptor_gain0.94FLG, CCDST
1:152314746:TTCT:Tacceptor_gain0.94FLG, CCDST
1:152314747:TCTG:Tacceptor_gain0.94FLG, CCDST
1:152314748:C:Aacceptor_gain0.92FLG, CCDST
1:152314749:T:Aacceptor_gain0.91FLG, CCDST
1:152314744:GCacceptor_gain0.96FLG, CCDST
1:152314743:GGA:Gacceptor_gain0.55FLG, CCDST
1:152314742:TGGAT:Tacceptor_gain0.52FLG, CCDST
1:152314741:CTGGA:Cacceptor_gain0.52FLG, CCDST
1:152314779:C:CAacceptor_gain0.53FLG, CCDST
1:152314782:C:CTacceptor_gain0.78FLG, CCDST
1:152314745:ATT:Aacceptor_gain0.83FLG, CCDST
1:152314780:ATC:Aacceptor_gain0.70FLG, CCDST
1:152314781:T:Aacceptor_gain0.71FLG, CCDST
1:152314775:A:ACacceptor_gain0.71FLG, CCDST
1:152314749:T:TCacceptor_gain0.70FLG, CCDST
1:152314755:G:GCacceptor_gain0.66FLG, CCDST
1:152314774:GA:Gacceptor_gain0.64FLG, CCDST

AlphaMissense pathogenicity: 5,386+ total variants | Likely pathogenic: ~100 variants

TOP 30 likely-pathogenic variants (highest am_pathogenicity scores):

Protein variantam_pathogenicity scoream_class
L754P0.999likely_pathogenic
F796L0.996likely_pathogenic
R756P0.996likely_pathogenic
D755V0.975likely_pathogenic
F796C0.974likely_pathogenic
L754Q0.973likely_pathogenic
F796S0.979likely_pathogenic
Y766H0.985likely_pathogenic
D755H0.946likely_pathogenic
Y766D0.974likely_pathogenic
D755A0.944likely_pathogenic
D793H0.980likely_pathogenic
L767P0.934likely_pathogenic
Y766C0.963likely_pathogenic
F796V0.963likely_pathogenic
F796I0.962likely_pathogenic
D793V0.960likely_pathogenic
L769Q0.963likely_pathogenic
L791P0.953likely_pathogenic
V795D0.956likely_pathogenic
Y766S0.972likely_pathogenic
L769R0.951likely_pathogenic
D793G0.902likely_pathogenic
S794F0.954likely_pathogenic
D793N0.837likely_pathogenic
V795A0.846likely_pathogenic
V795L0.804likely_pathogenic
L754V0.566likely_pathogenic
D755N0.666likely_pathogenic
D753H0.901likely_pathogenic

Pathways & Gene Ontology

Reactome Pathways (22 total)

Pathway IDPathway NameDisease
R-HSA-1839122Signaling by activated point mutants of FGFR1Yes
R-HSA-5655302Signaling by FGFR1 in diseaseYes
R-HSA-8853336Signaling by plasma membrane FGFR1 fusionsYes
R-HSA-9758919Epithelial-Mesenchymal Transition (EMT) during gastrulationNo
R-HSA-9793380Formation of paraxial mesodermNo
R-HSA-109704PI3K CascadeNo
R-HSA-1257604PIP3 activates AKT signalingNo
R-HSA-1839120Signaling by FGFR1 amplification mutantsYes
R-HSA-190370FGFR1b ligand binding and activationNo
R-HSA-190373FGFR1c ligand binding and activationNo
R-HSA-190374FGFR1c and Klotho ligand binding and activationNo
R-HSA-2219530Constitutive Signaling by Aberrant PI3K in CancerYes
R-HSA-375165NCAM signaling for neurite out-growthNo
R-HSA-445144Signal transduction by L1No
R-HSA-5654219Phospholipase C-mediated cascade: FGFR1No
R-HSA-5654687Downstream signaling of activated FGFR1No
R-HSA-5654688SHC-mediated cascade: FGFR1No
R-HSA-5654689PI-3K cascade: FGFR1No
R-HSA-5654693FRS-mediated FGFR1 signalingNo
R-HSA-5654726Negative regulation of FGFR1 signalingNo
R-HSA-5673001RAF/MAP kinase cascadeNo
R-HSA-6811558PI5P, PP2A and IER3 Regulate PI3K/AKT SignalingNo

MSigDB Gene Sets (100+ total)

Key gene sets include FGFR-specific pathways (M1090, M1092) and developmental/signaling GO terms (skeletal system development, epithelium development, morphogenesis, MAPK cascade regulation, neurogenesis, proliferation control).

Gene Ontology Annotations

Biological Process (68 terms)

Term IDTerm Name
GO:0008543fibroblast growth factor receptor signaling pathway
GO:0001525angiogenesis
GO:0001837epithelial to mesenchymal transition
GO:0001501skeletal system development
GO:0048705skeletal system morphogenesis
GO:0000165MAPK cascade
GO:0043410positive regulation of MAPK cascade
GO:0006468protein phosphorylation
GO:0046777protein autophosphorylation
GO:0030326embryonic limb morphogenesis
GO:0001764neuron migration
GO:0031175neuron projection development
GO:0010976positive regulation of neuron projection development
GO:0045666positive regulation of neuron differentiation
GO:0001701in utero embryonic development
GO:0043009chordate embryonic development
GO:0002062chondrocyte differentiation
GO:0048863stem cell differentiation
GO:0072089stem cell proliferation
GO:0044344cellular response to fibroblast growth factor stimulus

Molecular Function (9 terms)

Term IDTerm Name
GO:0005007fibroblast growth factor receptor activity
GO:0004713protein tyrosine kinase activity
GO:0017134fibroblast growth factor binding
GO:0008201heparin binding
GO:0005524ATP binding
GO:0042169SH2 domain binding
GO:0042803protein homodimerization activity
GO:0042802identical protein binding
GO:0090722receptor-receptor interaction

Cellular Component (9 terms)

Term IDTerm Name
GO:0005886plasma membrane
GO:0016020membrane
GO:0043235receptor complex
GO:0005576extracellular region
GO:0005634nucleus
GO:0005829cytosol
GO:0031410cytoplasmic vesicle
GO:0098794postsynapse
GO:0098978glutamatergic synapse

Protein interactions & networks

Total protein-protein interactions: ~4,000+ (STRING: 4,013 | BioGRID: 100+ | IntAct: 100+)

Top 30 highest-confidence interacting proteins

RankProteinUniprot IDSourceScore/EvidenceInteraction Type
1FGF2P55075STRING999Direct interaction
2Fibroblast growth factor receptor-like 1P05230STRING998-
3Protein kinase C alphaP08620STRING998-
4Protein kinase C beta-1P09038STRING998-
5Protein kinase C gammaP31371STRING998-
6Rac/RhoA guanine nucleotide exchange factorQ92913STRING998-
7Tyrosine-protein phosphatase non-receptor type 6O15520STRING997-
8Hematopoietic cell kinaseO60258STRING997-
9Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunitP10767STRING997-
10Protein tyrosine kinase 2P11487STRING997-
11Pleckstrin homology domain-containing family A member 1P12034STRING997-
12Phospholipase C gamma-1P21781STRING997Direct interaction (0.90)
13Growth factor receptor-bound protein 2-like adaptor proteinQ86Z14STRING997-
14GTPase-activating proteinQ9GZV9STRING997-
15Catenin alpha-1Q9UEF7STRING997-
16SRC proto-oncogene proteinO76093STRING996-
17STAT5AO43320STRING995-
18Dual specificity protein phosphatase 3Q9HCT0STRING995-
19Receptor protein-tyrosine kinase-like orphan receptor 1Q9NP95STRING995-
20GTPase KrasQ8WU20STRING987-
21FGF ligandQ9NSA1STRING986Direct interaction (0.44)
22Proto-oncogene tyrosine-protein kinase SrcP13591STRING942-
23Fibroblast growth factor 1P22455STRING935Direct interaction (0.84)
24Fibroblast growth factor 2P23352STRING935Direct interaction (0.91)
25Adaptor protein complex AP-1P08908STRING887-
26Clathrin heavy chain 1P31431STRING887-
27Catenin beta-1 (β-catenin)Q14449STRING886Physical association (0.62)
28MAPK kinase kinase 1P19022STRING885-
29Mitogen-activated protein kinase 1O95750STRING884-
30Non-receptor tyrosine-protein kinase TNK2P19174STRING868-

High-confidence direct interactions (IntAct): FGF2 (0.91), FGF1 (0.84), PLCG1 (0.90), CTNNB1 (0.62), CDH1 (0.54), FGFR1 homodimer (0.62), FGF23 (0.54), Kl/KLB (0.56)

Structural/embedding similarity (ESM2) — Top 20

RankProtein IDTop ScoreAvg SimilarityNotes
1B4GBH01.00000.9887Perfect match
2B4HNW41.00000.9889Perfect match
3B4QC631.00000.9889Perfect match
4Q290N51.00000.9886Perfect match
5Q6AWJ90.99990.9891Near-perfect
6B3NS990.99990.9885Near-perfect
7B4P5Q90.99990.9883Near-perfect
8Q045890.99990.9910FGF receptor-related
9P218040.99930.9914Human FGFR1 paralogue
10P160920.99990.9910Mouse FGFR1
11P221820.99920.9915FGF receptor
12Q912850.99930.9916FGF receptor ortholog
13P184600.99900.9885FGF receptor
14P184610.99970.9883FGF receptor family
15P218020.99970.9874FGF receptor
16P218030.99970.9882FGF receptor
17P226070.99940.9866Tyrosine kinase
18B3MH430.99950.9873FGFR-related
19B4KPU00.99930.9870FGF receptor
20O421270.99840.9917Avian FGF receptor

Sequence homology (DIAMOND) — Top 20

RankProtein IDIdentity (%)Bit ScoreSimilarity
1A0M8S8100.02,803Identical sequence
2P0858199.82,813Highly homologous
3A0M8R799.32,784Highly homologous
4P0806997.72,685Highly conserved
5P2406299.52,784Highly conserved
6P0958199.61,887Highly conserved
7P0621399.52,691Highly conserved
8P1605695.32,675Well conserved
9P3591795.92,650Well conserved
10P9752395.32,674Well conserved
11P3591895.22,582Well conserved
12P9779386.62,728Moderately conserved
13O6067499.72,316Highly conserved
14O0877595.22,575Well conserved
15P0DV8489.12,845Moderately conserved
16O1906495.32,239Well conserved
17G3V9H894.42,149Well conserved
18P5233293.72,181Well conserved
19O9779998.41,845Highly conserved
20P3554694.42,146Well conserved

Network summary: FGFR1 forms a major signaling hub with FGF ligands (FGF1, FGF2, FGF8, FGF23) and co-receptors (Kl/KLB), connecting to downstream kinase cascades (PI3K, PLC-γ1, SRC, ERK-MAPK pathways) and structural proteins (β-catenin, cadherins).

Transcription factor regulatory data

FGFR1 is not a transcription factor. FGFR1 is a receptor tyrosine kinase (RTK) with fibroblast growth factor binding and signaling activity. Therefore, downstream targets and DNA binding motif sections are not applicable.

Upstream Regulators

Total count: 102 transcription factors regulate FGFR1 expression

Top upstream regulators with defined regulation type and/or high confidence:

Transcription FactorRegulation TypeConfidence
E2F1ActivationHigh
KLF9ActivationHigh
TEAD4ActivationHigh
KLF10RepressionHigh
SP1UnknownHigh
E2F4UnknownHigh
ATF1ActivationHigh
CEBPBHigh
DNMT1High
EZH2High
GATA3High
HINFPHigh
IRF1High
IRF2High
IRF3High
KAT7High
KDM5AHigh
KDM5BHigh
KDM5CHigh
KMT2AHigh
MBD2High
NFE2L2High
PAX3High
RARAHigh
SP3High
SP7High
TAL1High
TBPHigh
TCF3High
TFAP2AHigh

Evidence type: Predictions from CollecTRI (a comprehensive transcription factor regulatory network resource integrating ChIP-seq, DNase-seq, and computational predictions).

Drug & pharmacology data

Targeting Molecules

FGFR1 is a well-established drug target with 4,055 molecules in ChEMBL and 30 drugs in DrugBank.

Top Approved Drugs (Phase 4) by Clinical Trial Count:

Molecule IDNameMechanismTrialsNotes
CHEMBL1336Sorafenib (Nexavar)Multi-kinase inhibitor (FGFR1, VEGFR, RAF)572Approved for renal/hepatocellular carcinoma
CHEMBL1289601Lenvatinib (Kisplyx)Multi-kinase inhibitor (FGFR1, VEGFR, RET, KIT)425Approved for thyroid, endometrial, hepatocellular carcinoma
CHEMBL1289926Axitinib (Inlyta)Multi-kinase inhibitor (VEGFR1/2/3, FGFR1)172Approved for renal cell carcinoma
CHEMBL1171837Ponatinib (Iclusig)Pan-kinase inhibitor (BCR-ABL, FGFR1, multi-target)58Approved for CML/ALL
CHEMBL1289494Tivozanib (Fotivda)Multi-kinase inhibitor (VEGFR1/2/3, FGFR1)36Approved for renal cell carcinoma
CHEMBL1287853Fedratinib (Inrebic)JAK2/FLT3 inhibitor (also FGFR1 active)27Approved for myelofibrosis
CHEMBL1852688Infigratinib (Truseltiq)FGFR-selective inhibitor (1/2/3)28Approved for cholangiocarcinoma with FGFR2 fusions

Clinical Trials

Top active/recent trials involving FGFR1-targeting drugs span multiple cancer indications (renal, hepatocellular, thyroid, cholangiocarcinoma, myelofibrosis) and phase 2-4 development stages. LENVATINIB and SORAFENIB together account for >900 registered trials, reflecting their multi-indication approval status.

Pharmacogenomics

Known biomarkers: FGFR1 gene alterations (mutations, translocations, amplifications) predict response to FGFR inhibitors; clinically used for:

  • Cholangiocarcinoma: FGFR2 fusions/mutations select for infigratinib
  • Lung cancer: FGFR1 amplification/mutations predict response to FGFR inhibitors
  • Myeloproliferative neoplasms: JAK2 V617F co-testing with fedratinib

No established pharmacogenomic dosing guidelines for CYP450 polymorphisms or other germline variants currently exist for FGFR1-targeting drugs in standard practice. Dose adjustments based on organ function (hepatic/renal) are typical rather than genotype-guided.

Expression profiles

Tissue Expression (Bgee)

FGFR1 shows ubiquitous expression across human tissues with high breadth (292 tissues with present calls out of 294 conditions). Maximum expression score: 98.95; average: 90.66.

RankTissue/ConditionExpression ScoreQuality
1Buccal mucosa cell98.95Gold
2Stromal cell of endometrium98.88Gold
3Calcaneal tendon98.84Gold
4Right ovary98.59Gold
5Paraflocculus98.54Gold
6Left ovary98.49Gold
7Right coronary artery98.47Gold
8Left uterine tube98.44Gold
9Cerebellar hemisphere98.42Gold
10Right hemisphere of cerebellum98.38Gold
11Cerebellar cortex98.37Gold
12Cerebellum98.30Gold
13Descending thoracic aorta98.29Gold
14Body of pancreas98.25Gold
15Ascending aorta98.23Gold
16Thoracic aorta98.22Gold
17Aorta98.17Gold
18Popliteal artery98.16Gold
19Tibial artery98.15Gold
20Gall bladder98.11Gold
21Mucosa of stomach98.07Gold
22Lower esophagus muscularis layer98.06Gold
23Saphenous vein98.05Gold
24Lower esophagus98.02Gold
25Esophagogastric junction muscularis propria98.02Gold
26Colonic epithelium97.94Gold
27Omental fat pad97.90Gold
28Peritoneum97.89Gold
29Coronary artery97.89Gold
30Tibial nerve97.83Gold

Tissue-enriched patterns: High expression in vascular tissues (coronary arteries, aorta, arteries), endocrine tissues (ovary, pancreas), nervous system (cerebellum, paraflocculus), and mesenchymal tissues (tendons, stromal cells). Strong mucosal expression.

Cell Type Expression

Cell type information is integrated with tissue data in Bgee. Notable cell type entries include:

  • Buccal mucosa cell (98.95) — highest cell type expression
  • Stromal cell of endometrium (98.88) — reproductive tissue

This reflects FGFR1’s role in fibroblast and stromal cell biology, consistent with its identity as a fibroblast growth factor receptor.

Single-Cell RNA-seq Datasets (SCXA)

FGFR1 is covered across 14 major single-cell studies:

Study IDDescriptionSpeciesCell Count
E-CURD-126Normal and fibrotic lungsHomo sapiens121,080
E-MTAB-7407Fetal liver, skin, kidneyHomo sapiens473,803
E-MTAB-8142Breast skin cellsHomo sapiens809,675
E-MTAB-10855Mammary gland lactationHomo sapiens74,404
E-MTAB-10018Pluripotent stem cellsHomo sapiens37,007
E-MTAB-5061Pancreas (healthy & T2D)Homo sapiens3,386
E-CURD-7Adult breast epitheliumHomo sapiens867
E-ENAD-27Human islet cells (T2D)Homo sapiens1,145
E-MTAB-10885Milk vs. non-lactating breastHomo sapiens28,628
E-GEOD-75140Cerebral organoids (fetal neocortex)Homo sapiens734
E-MTAB-11121Retinal organoids (hESC-derived)Homo sapiens22,253
E-GEOD-93593Ventral cell differentiation (hESC)Homo sapiens1,733
E-ENAD-21Breast epithelial cellsHomo sapiens867
E-MTAB-9841Mammary epithelial cells (lactation)Homo sapiens92,071

Notable populations: FGFR1 expression is documented in fibrotic lung tissue, developmental tissues (neural, retinal organoids), pancreatic islet cells, and reproductive/mammary tissues, aligning with its roles in mesenchymal, endothelial, and developmental biology.

Disease associations

Mendelian / monogenic disease

Skeletal dysplasias and craniosynostosis syndromes:

DiseaseDisease ID(s)InheritanceEvidence
Pfeiffer syndromeOMIM:101600Autosomal dominantDefinitive
Jackson-Weiss syndromeOMIM:123150Autosomal dominantStrong
Osteoglophonic dysplasiaOMIM:166250Autosomal dominantStrong/Definitive
Hartsfield-Bixler-Demyer syndromeOMIM:615465, MONDO:0014196, ORPHANET:2117Autosomal dominantDefinitive/Strong
Isolated trigonocephalyORPHANET:3366Autosomal dominantSupportive

Endocrine and reproductive disorders:

DiseaseDisease ID(s)InheritanceEvidence
Hypogonadotropic hypogonadism 2 with or without anosmiaOMIM:147950Autosomal dominantDefinitive
Kallmann syndromeORPHANET:478Autosomal dominantSupportive
Normosmic congenital hypogonadotropic hypogonadismORPHANET:432Autosomal dominantSupportive

Developmental and neurological disorders:

DiseaseDisease ID(s)InheritanceEvidence
Encephalocraniocutaneous lipomatosisOMIM:613001, MONDO:0013074, ORPHANET:2396Autosomal dominantDefinitive
Septooptic dysplasiaORPHANET:3157Autosomal dominantSupportive
HoloprosencephalyMONDO:0016296, ORPHANET:2162Autosomal recessiveSupportive
Lobar holoprosencephalyMONDO:0019756, ORPHANET:93924Autosomal dominantSupportive

Craniofacial and dental abnormalities:

DiseaseDisease ID(s)InheritanceEvidence
Tooth agenesisORPHANET:99798Autosomal dominantSupportive
Orofacial cleftMONDO:0007335Autosomal dominantSupportive

Other neoplastic conditions:

DiseaseDisease ID(s)InheritanceEvidence
Pilomyxoid astrocytomaMONDO:0016692, ORPHANET:251615Somatic mutations

Phenotype associations

Top 30 HPO terms associated with FGFR1:

HPO IDPhenotype
HP:0000006Autosomal dominant inheritance
HP:0001363Craniosynostosis
HP:0001360Holoprosencephaly
HP:0000243Trigonocephaly
HP:0000044Hypogonadotropic hypogonadism
HP:0000458Anosmia
HP:0000175Cleft palate
HP:0000202Orofacial cleft
HP:0000204Cleft upper lip
HP:0001508Failure to thrive
HP:0001249Intellectual disability
HP:0001360Holoprosencephaly
HP:0000238Hydrocephalus
HP:0000252Microcephaly
HP:0000256Macrocephaly
HP:0000271Abnormality of the face
HP:0000929Abnormal skull morphology
HP:0001321Cerebellar hypoplasia
HP:0000316Hypertelorism
HP:0001012Multiple lipomas
HP:0001627Abnormal heart morphology
HP:0000026Male hypogonadism
HP:0000028Cryptorchidism
HP:0000164Abnormality of the dentition
HP:0000677Oligodontia
HP:0000685Hypoplasia of teeth
HP:0000823Delayed puberty
HP:0001159Syndactyly
HP:0000764Abnormality of the skeletal system
HP:0001511Intrauterine growth retardation

Complex-disease / GWAS associations

Top 30 GWAS associations with FGFR1 locus:

TraitVariant/GeneP-valueStudy ID
Nonsyndromic cleft lip with cleft palateFGFR14.0e-08GCST004166_49
Autism spectrum disorder or schizophreniaFGFR14.0e-09GCST004521_142
PR intervalFGFR1-LINC030425.0e-10GCST007045_31
Birth weightFGFR1-LINC030428.0e-11GCST008362_94
Anorexia nervosa, attention-deficit/hyperactivity disorder, autism spectrum disorder, bipolar disorder, major depression, obsessive-compulsive disorder, schizophrenia, or Tourette syndromeFGFR12.0e-09GCST009600_6
Type 2 diabetesFGFR1-LINC030424.0e-08GCST010118_105
Triglyceride levelsFGFR1-LINC030424.0e-09GCST010244_265
PR intervalFGFR1-LINC030423.0e-19GCST010321_68
Electrocardiogram morphology (amplitude at temporal datapoints)FGFR11.0e-11GCST010796_2009
Electrocardiogram morphology (amplitude at temporal datapoints)FGFR12.0e-08GCST010796_2010
Electrocardiogram morphology (amplitude at temporal datapoints)FGFR14.0e-10GCST010796_2802
Electrocardiogram morphology (amplitude at temporal datapoints)FGFR16.0e-09GCST010796_2803
Electrocardiogram morphology (amplitude at temporal datapoints)FGFR12.0e-08GCST010796_67
Electrocardiogram morphology (amplitude at temporal datapoints)FGFR13.0e-08GCST010796_68
Electrocardiogram morphology (amplitude at temporal datapoints)FGFR13.0e-09GCST010796_69
Electrocardiogram morphology (amplitude at temporal datapoints)FGFR12.0e-08GCST010796_70
Electrocardiogram morphology (amplitude at temporal datapoints)FGFR13.0e-09GCST010796_71
Electrocardiogram morphology (amplitude at temporal datapoints)FGFR12.0e-09GCST010796_72
Electrocardiogram morphology (amplitude at temporal datapoints)FGFR13.0e-09GCST010796_73
Electrocardiogram morphology (amplitude at temporal datapoints)FGFR19.0e-10GCST010796_74
Electrocardiogram morphology (amplitude at temporal datapoints)FGFR12.0e-10GCST010796_75
Adult body sizeFGFR1-LINC030427.0e-09GCST010988_218
Body size at age 10FGFR1-LINC030427.0e-09GCST010989_14
Response to cognitive-behavioural therapy in anxiety disorderFGFR1-LINC030424.0e-06GCST003469_12
Age at first sexual intercourseFGFR1-LINC030421.0e-08GCST90000047_63
Erosive tooth wear (severe vs non-severe)LINC030426.0e-06GCST006218_24
Erosive tooth wear (severe vs non-severe)LINC030428.0e-09GCST006218_68
Erosive tooth wear (severe vs none or mild)LINC030425.0e-06GCST006226_13
Bipolar disorderLETM27.0e-06GCST008103_171

Structured Data Sources

Generated with Claude Haiku 4.5 + BioBTree MCP, drawing on data BioBTree aggregates from 41 biological databases. Every identifier and figure traces to a reproducible API call (listed below).

Further analyze this answer or run your own queries with BioBTree MCP.

Datasets: alphafold, alphamissense, antibody, bgee, biogrid_interaction, ccds, chembl_molecule, chembl_target, clinical_trials, clinvar, collectri, diamond_similarity, drugbank, ensembl, entrez, esm2_similarity, exon, fantom5_gene, gencc, go, gwas, hgnc, hpa, hpo, intact, interpro, mim, mondo, msigdb, orphanet, ortholog, pdb, pfam, pharmgkb, reactome, refseq, scxa, spliceai, string_interaction, transcript, uniprot
Generated: 2026-05-25 — For the latest data, query BioBTree directly via MCP or API.
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