GRAP2

gene
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Also known as Grf40GrbXGRBLGGADSMona

Summary

GRAP2 (GRB2 related adaptor protein 2, HGNC:4563) is a protein-coding gene on chromosome 22q13.1, encoding GRB2-related adapter protein 2 (O75791). Interacts with SLP-76 to regulate NF-AT activation.

This gene encodes a member of the GRB2/Sem5/Drk family. This member is an adaptor-like protein involved in leukocyte-specific protein-tyrosine kinase signaling. Like its related family member, GRB2-related adaptor protein (GRAP), this protein contains an SH2 domain flanked by two SH3 domains. This protein interacts with other proteins, such as GRB2-associated binding protein 1 (GAB1) and the SLP-76 leukocyte protein (LCP2), through its SH3 domains. Multiple alternatively spliced transcript variants encoding distinct isoforms have been found for this gene.

Source: NCBI Gene 9402 — RefSeq curated summary.

At a glance

  • GWAS associations: 2
  • Clinical variants (ClinVar): 52 total
  • MANE Select transcript: NM_004810

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:4563
Approved symbolGRAP2
NameGRB2 related adaptor protein 2
Location22q13.1
Locus typegene with protein product
StatusApproved
AliasesGrf40, GrbX, GRBLG, GADS, Mona
Ensembl geneENSG00000100351
Ensembl biotypeprotein_coding
OMIM604518
Entrez9402

Gene structure

Transcript identifiers

Ensembl transcripts: 8 — 4 protein_coding, 3 retained_intron, 1 protein_coding_CDS_not_defined

ENST00000344138, ENST00000407075, ENST00000420971, ENST00000460449, ENST00000461082, ENST00000478445, ENST00000481263, ENST00000861558

RefSeq mRNA: 5 — MANE Select: NM_004810 NM_001291824, NM_001291825, NM_001291826, NM_001291828, NM_004810

CCDS: CCDS13999

Canonical transcript exons

ENST00000344138 — 8 exons

ExonStartEnd
ENSE000006548303996599039966158
ENSE000006548323996941139969533
ENSE000012448393996804239968272
ENSE000012448723997090539973721
ENSE000014887583990108439901330
ENSE000034638833995581939955910
ENSE000034910903994709339947184
ENSE000035435863996005539960174

Expression profiles

Bgee: expression breadth ubiquitous, 159 present calls, max score 97.79.

FANTOM5 (CAGE): breadth broad, TPM avg 9.8865 / max 787.7158, expressed in 329 samples.

FANTOM5 promoters (10 alternative TSS)

Promoter IDTPM avgSamples expressed
1923893.3664154
1923853.2920171
1923821.6544138
1923870.426279
1923860.320278
1923810.243894
1923830.206585
1923840.191683
1923880.143855
1923800.041725

Top tissues by expression

289 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
monocyteCL:000057697.79gold quality
mononuclear cellCL:000084297.60gold quality
leukocyteCL:000073897.37gold quality
granulocyteCL:000009493.67gold quality
bloodUBERON:000017887.42gold quality
thymusUBERON:000237082.74gold quality
lymph nodeUBERON:000002982.46gold quality
male germ line stem cell (sensu Vertebrata) in testisCL:0000089 ∩ UBERON:000047380.52gold quality
spleenUBERON:000210679.25gold quality
colonic epitheliumUBERON:000039778.02gold quality
endometrium epitheliumUBERON:000481177.33gold quality
vermiform appendixUBERON:000115476.94gold quality
bone marrow cellCL:000209275.20gold quality
upper lobe of left lungUBERON:000895274.77gold quality
right lungUBERON:000216774.35gold quality
frontal poleUBERON:000279574.09gold quality
paraflocculusUBERON:000535173.95gold quality
bone marrowUBERON:000237173.81gold quality
small intestine Peyer’s patchUBERON:000345473.42gold quality
middle frontal gyrusUBERON:000270273.38gold quality
gall bladderUBERON:000211073.16gold quality
upper lobe of lungUBERON:000894873.10gold quality
mucosa of transverse colonUBERON:000499172.16gold quality
tibial nerveUBERON:000132371.94gold quality
small intestineUBERON:000210871.73gold quality
caecumUBERON:000115371.72gold quality
mucosa of stomachUBERON:000119970.08gold quality
rectumUBERON:000105270.07gold quality
tonsilUBERON:000237270.05gold quality
secondary oocyteCL:000065567.66gold quality

Single-cell (SCXA)

Detected in 10 experiment(s), a significant marker in 10.

ExperimentMarker?Max mean expression
E-CURD-122yes23.14
E-MTAB-9221yes19.47
E-HCAD-10yes16.22
E-MTAB-9067yes15.92
E-CURD-112yes15.88
E-MTAB-8410yes11.36
E-MTAB-10042yes8.55
E-MTAB-9801yes7.59
E-HCAD-1yes7.30
E-ANND-3no0.00

Regulation

Is transcription factor: no

Upstream regulators (CollecTRI, top): SPI1, SPIB

miRNA regulators (miRDB)

85 targeting GRAP2, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-8485100.0077.574731
HSA-MIR-29A-3P100.0073.111835
HSA-MIR-29B-3P100.0073.181833
HSA-MIR-29C-3P100.0073.151833
HSA-MIR-4692100.0067.322066
HSA-MIR-6867-5P100.0082.213464
HSA-MIR-453499.9966.581907
HSA-MIR-451499.9967.101870
HSA-MIR-1213699.9872.815713
HSA-MIR-4725-3P99.9669.532520
HSA-MIR-6780B-5P99.9669.602562
HSA-MIR-211099.9666.681930
HSA-MIR-808299.9567.271170
HSA-MIR-23A-3P99.9574.243163
HSA-MIR-23B-3P99.9574.243163
HSA-MIR-23C99.9573.923192
HSA-MIR-311999.9271.342390
HSA-MIR-6768-5P99.9267.361942
HSA-MIR-329-3P99.9166.561234
HSA-MIR-362-3P99.9166.381267
HSA-MIR-4731-5P99.8967.232537
HSA-MIR-427199.8868.322244
HSA-MIR-449699.8868.892236
HSA-MIR-6857-5P99.8765.32985
HSA-MIR-579-3P99.8671.663628
HSA-MIR-664B-3P99.8471.653590
HSA-MIR-130B-5P99.8368.501888
HSA-MIR-204-5P99.7971.622439
HSA-MIR-211-5P99.7971.652440
HSA-MIR-323A-3P99.7970.301739

Literature-anchored findings (GeneRIF, showing 15)

  • Upstream open reading frames regulate translation of this protein’s mRNA in megakaryocytes. (PMID:12487779)
  • Exogenous expression of GrpL in a GrpL-negative B cell line leads to enhanced antigen receptor-induced extracellular signal-related kinase and p38 mitogen-activated protein kinase phosphorylation. (PMID:12496419)
  • AML-1 plays a role in driving Mona protein expression in T and myelomonocytic cells. (PMID:12554803)
  • Plays a tissue-specific role as an inhibitor of RET receptor tyrosine kinase mitogenic signaling (PMID:12917638)
  • Gads plays a dominant role in CD28-mediated IL-2 promoter activation. (PMID:16818765)
  • The integrity of T-cell receptor signaling in vivo is sustained both by strong selection of SLP-76 for the Gads C-SH3 domain and by a capacity to buffer intrinsic crossreactivity. (PMID:17235283)
  • Our findings define a pathway involving CD28 binding to Grb-2 and its co-operativity with Vav1 in the regulation of T-cell co-stimulation. (PMID:18295596)
  • Consistent Grap-2 expression suggests a specific role for this adaptor in human medullary thyroid carcinoma, while qualitative alterations do not appear to influence RET signaling (PMID:19027225)
  • The results show that Bcr-Abl regulates the actin cytoskeleton and non-apoptotic membrane blebbing via a GADS/Slp-76/Nck1 adaptor protein pathway. (PMID:20079431)
  • Histidine domain-protein tyrosine phosphatase interacts with Grb2 and GrpL (PMID:21179510)
  • GADS mediates lymphoid disease downstream of BCR-ABL through the recruitment of specific signaling intermediates. (PMID:23399893)
  • Gads was dispensable for TCR-induced phosphorylation of SLP-76, but was a dose-dependent amplifier of TCR-induced CD69 expression. (PMID:25452106)
  • GADS deficient T cells displayed similar levels of T cell receptor -induced SLP-76 and PLC-gamma1 phosphorylation but exhibited substantial decrease in TCR-induced IL-2 and IFN-gamma release. (PMID:25636200)
  • Following phosphorylation of the tyrosine, the proteins growth factor receptor-bound protein 2 (Grb2), Grb2-related adaptor downstream of Shc (Gads), and p85 subunit of phosphoinositide 3-kinase may bind to pYMNM (where pY is phosphotyrosine) via their Src homology 2 (SH2) domains, leading to downstream signaling to distinct immune pathways. These three adaptor proteins bind to the same site on CD28 with variable affinity (PMID:27927989)
  • These data are consistent with a model in which bivalent recruitment of a GADS/SLP-76 complex is required for costimulation by CD6. (PMID:28289074)

Cross-species orthologs

6 orthologs

OrganismSymbolGene ID
danio_reriograp2aENSDARG00000006468
danio_reriograp2bENSDARG00000101169
mus_musculusGrap2ENSMUSG00000042351
rattus_norvegicusGrap2ENSRNOG00000018316
drosophila_melanogasterdockFBGN0010583
caenorhabditis_elegansWBGENE00006410

Paralogs (9): DAPP1 (ENSG00000070190), NCK2 (ENSG00000071051), SLA2 (ENSG00000101082), GRAP (ENSG00000154016), SLA (ENSG00000155926), NCK1 (ENSG00000158092), GRB2 (ENSG00000177885), GRAPL (ENSG00000189152), SH2D5 (ENSG00000189410)

Protein

Protein identifiers

GRB2-related adapter protein 2O75791 (reviewed: O75791)

Alternative names: Adapter protein GRID, GRB-2-like protein, GRBLG, GRBX, Grf40 adapter protein, Growth factor receptor-binding protein, Hematopoietic cell-associated adapter protein GrpL, P38, Protein GADS, SH3-SH2-SH3 adapter Mona

All UniProt accessions (3): O75791, B1AH86, Q6FI14

UniProt curated annotations — full annotation on UniProt →

Function. Interacts with SLP-76 to regulate NF-AT activation. Binds to tyrosine-phosphorylated shc.

Subunit / interactions. Interacts with phosphorylated LIME1 upon TCR activation. Interacts with phosphorylated LAT and LAX1 upon TCR activation. Interacts with SHB. Interacts with PTPN23.

Subcellular location. Nucleus. Cytoplasm. Endosome.

Similarity. Belongs to the GRB2/sem-5/DRK family.

Isoforms (2)

UniProt IDNamesCanonical?
O75791-11yes
O75791-22

RefSeq proteins (5): NP_001278753, NP_001278754, NP_001278755, NP_001278757, NP_004801* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR000980SH2Domain
IPR001452SH3_domainDomain
IPR035646GRAP2_C_SH3Domain
IPR036028SH3-like_dom_sfHomologous_superfamily
IPR036860SH2_dom_sfHomologous_superfamily
IPR043539Grb2-likeFamily

Pfam: PF00017, PF00018

UniProt features (24 total): strand 7, modified residue 5, domain 3, splice variant 2, helix 2, compositionally biased region 2, chain 1, sequence variant 1, region of interest 1

Structure

Experimental structures (PDB)

1 structures.

PDBMethodResolution (Å)
5GJHX-RAY DIFFRACTION1.2

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-O75791-F170.780.31

Functional residue map

Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.

Post-translational modifications (5): 236, 262, 45, 106, 187

Function

Pathways and Gene Ontology

Reactome pathways

8 pathways

IDPathway
R-HSA-1433557Signaling by SCF-KIT
R-HSA-202433Generation of second messenger molecules
R-HSA-2424491DAP12 signaling
R-HSA-2871796FCERI mediated MAPK activation
R-HSA-2871809FCERI mediated Ca+2 mobilization
R-HSA-389356Co-stimulation by CD28
R-HSA-9607240FLT3 Signaling
R-HSA-9680350Signaling by CSF1 (M-CSF) in myeloid cells

MSigDB gene sets: 190 (showing top): MODULE_92, REACTOME_INNATE_IMMUNE_SYSTEM, REACTOME_ADAPTIVE_IMMUNE_SYSTEM, REACTOME_CYTOKINE_SIGNALING_IN_IMMUNE_SYSTEM, REACTOME_CO_STIMULATION_BY_CD28, GOBP_CELL_CELL_SIGNALING, OSWALD_HEMATOPOIETIC_STEM_CELL_IN_COLLAGEN_GEL_UP, AML_Q6, HUI_MAPK14_TARGETS_UP, GOBP_RAS_PROTEIN_SIGNAL_TRANSDUCTION, REACTOME_TCR_SIGNALING, GOBP_SMALL_GTPASE_MEDIATED_SIGNAL_TRANSDUCTION, MODULE_46, ACEVEDO_METHYLATED_IN_LIVER_CANCER_DN, FOXO4_02

GO Biological Process (4): signal transduction (GO:0007165), Ras protein signal transduction (GO:0007265), cell-cell signaling (GO:0007267), regulation of MAPK cascade (GO:0043408)

GO Molecular Function (2): phosphotyrosine residue binding (GO:0001784), protein binding (GO:0005515)

GO Cellular Component (6): nucleus (GO:0005634), nucleoplasm (GO:0005654), cytoplasm (GO:0005737), endosome (GO:0005768), cytosol (GO:0005829), plasma membrane (GO:0005886)

Reactome top-level categories

Rollup of top-6 pathways:

CategoryPathways
Fc epsilon receptor (FCERI) signaling2
Cytokine Signaling in Immune system2
Signaling by Receptor Tyrosine Kinases1
TCR signaling1
DAP12 interactions1
Regulation of T cell activation by CD28 family1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
cellular anatomical structure3
cell communication2
signaling2
cellular process1
regulation of cellular process1
cellular response to stimulus1
small GTPase-mediated signal transduction1
MAPK cascade1
regulation of intracellular signal transduction1
protein phosphorylated amino acid binding1
binding1
intracellular membrane-bounded organelle1
nuclear lumen1
intracellular anatomical structure1
endomembrane system1
cytoplasmic vesicle1
cytoplasm1
membrane1
cell periphery1

Protein interactions and networks

STRING

1566 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
GRAP2LCP2Q13094999
GRAP2PLCG1P19174996
GRAP2VAV1P15498984
GRAP2GRB2P29354983
GRAP2LATO43561980
GRAP2NCK1P16333963
GRAP2SHC1P29353959
GRAP2ITKQ08881949
GRAP2FYB1O15117929
GRAP2ZAP70P43403926
GRAP2SOS1Q07889921
GRAP2CCNDBP1O95273914
GRAP2CALML6Q8TD86896
GRAP2CALML3P27482896
GRAP2CALML4Q96GE6896
GRAP2CALML5Q9NZT1896

IntAct

210 interactions, top by confidence:

ABTypeScore
LCP2GRAP2psi-mi:“MI:0915”(physical association)0.980
GRAP2LCP2psi-mi:“MI:0915”(physical association)0.980
LCP2GRAP2psi-mi:“MI:2364”(proximity)0.980

BioGRID (199): GRAP2 (Two-hybrid), SPRY2 (Two-hybrid), GRAP2 (Two-hybrid), GAB2 (Affinity Capture-MS), CDC27 (Affinity Capture-MS), STAMBP (Affinity Capture-MS), TNIP1 (Affinity Capture-MS), ZSCAN21 (Affinity Capture-MS), USP8 (Affinity Capture-MS), ANAPC5 (Affinity Capture-MS), PTPN23 (Affinity Capture-MS), ITCH (Affinity Capture-MS), GAB1 (Affinity Capture-MS), GAREM (Affinity Capture-MS), TRIM68 (Affinity Capture-MS)

ESM2 similar proteins: B2RZ59, F1LYQ8, F1P065, F8VPU2, O14796, O35324, O60880, O75791, O88890, O88900, O89100, O94887, P0CE43, P46108, P46109, P47941, P52735, P59622, P87378, P97369, Q03160, Q04929, Q06AA1, Q13239, Q13322, Q14449, Q15080, Q1RMW5, Q2I6J1, Q3ZBB1, Q45HK4, Q5ICW4, Q5RAB8, Q5U2U2, Q60760, Q60898, Q60992, Q63768, Q64010, Q6P4S2

Diamond homologs: A0JNJ1, A1CEK6, A1DFN5, A2QW93, A4RF61, A6QLK6, A7A261, F1LRS8, O35179, O35964, O43307, O74749, O75791, O75886, O88811, O89100, O93436, P02549, P07751, P09215, P09216, P10830, P13395, P16054, P16086, P16546, P23298, P24723, P28867, P29355, P32793, P34885, P38753, P43603, P53281, P62993, P62994, P70297, P87379, P97306

SIGNOR signaling

1 interactions.

AEffectBMechanism
MAP4K1“down-regulates activity”GRAP2phosphorylation

Enriched among interaction partners

Reactome pathways and GO biological processes over-represented among this gene’s 73 IntAct physical interaction partners (hypergeometric vs the genome-wide background, BH-FDR, gene-set size 15–500, ranked by fold). A functional readout of the neighbourhood — distinct from this gene’s own memberships above, and biased toward well-studied / hub proteins, so read it as themes rather than proof.

Reactome pathways:

PathwayPartnersFoldFDR
Constitutive Signaling by Aberrant PI3K in Cancer512.7×4e-03
PI5P, PP2A and IER3 Regulate PI3K/AKT Signaling59.7×6e-03

GO biological processes:

GO termPartnersFoldFDR
epidermal growth factor receptor signaling pathway623.2×1e-04
positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction78.6×2e-03
negative regulation of apoptotic process105.4×2e-03

Disease & clinical

Clinical variants and AI predictions

ClinVar

52 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance38
Likely benign2
Benign4

Top pathogenic / likely-pathogenic (0)

SpliceAI

1412 predictions. Top by Δscore:

VariantEffectΔscore
22:39969531:GGG:Gdonor_gain1.0000
22:39969531:GGGGT:Gdonor_loss1.0000
22:39969532:GGG:Gdonor_gain1.0000
22:39969534:G:GAdonor_loss1.0000
22:39969535:T:Adonor_loss1.0000
22:39970903:A:AGacceptor_gain1.0000
22:39970904:G:GGacceptor_gain1.0000
22:39970904:GC:Gacceptor_gain1.0000
22:39970904:GCGA:Gacceptor_gain1.0000
22:39955911:G:GGdonor_gain0.9900
22:39960049:CCACA:Cacceptor_loss0.9900
22:39960050:CACA:Cacceptor_loss0.9900
22:39960051:ACAG:Aacceptor_loss0.9900
22:39960052:CA:Cacceptor_loss0.9900
22:39960053:A:AGacceptor_gain0.9900
22:39960053:A:ATacceptor_loss0.9900
22:39960053:AGAT:Aacceptor_gain0.9900
22:39960054:G:GAacceptor_loss0.9900
22:39960054:G:GGacceptor_gain0.9900
22:39960054:GATG:Gacceptor_gain0.9900
22:39960171:TCAGG:Tdonor_loss0.9900
22:39960172:CAGG:Cdonor_loss0.9900
22:39960173:AG:Adonor_loss0.9900
22:39960174:GGTA:Gdonor_loss0.9900
22:39960175:GTACT:Gdonor_loss0.9900
22:39960176:T:Adonor_loss0.9900
22:39965980:T:TAacceptor_gain0.9900
22:39965984:CTCCA:Cacceptor_loss0.9900
22:39965985:TCCA:Tacceptor_loss0.9900
22:39965986:CCA:Cacceptor_loss0.9900

AlphaMissense

2188 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
22:39966004:T:AV102D1.000
22:39966082:T:CL128P1.000
22:39947131:T:CF9L0.999
22:39947133:C:AF9L0.999
22:39947133:C:GF9L0.999
22:39955840:T:AW34R0.999
22:39955840:T:CW34R0.999
22:39955849:G:CA37P0.999
22:39955877:T:AV46E0.999
22:39960056:T:AW58R0.999
22:39960056:T:CW58R0.999
22:39960086:G:CA68P0.999
22:39960132:G:CR83P0.999
22:39960165:T:AI94N0.999
22:39960167:T:CS95P0.999
22:39960168:C:AS95Y0.999
22:39960168:C:TS95F0.999
22:39960171:T:AV96D0.999
22:39966010:A:GH104R0.999
22:39966011:C:AH104Q0.999
22:39966011:C:GH104Q0.999
22:39966012:T:CF105L0.999
22:39966013:T:CF105S0.999
22:39966014:C:AF105L0.999
22:39966014:C:GF105L0.999
22:39966019:T:AV107D0.999
22:39966051:T:AW118R0.999
22:39966051:T:CW118R0.999
22:39971013:T:AW308R0.999
22:39971013:T:CW308R0.999

dbSNP variants (sampled 300 via entrez): RS1000001181 (22:39939046 C>A), RS1000121576 (22:39910083 G>C), RS1000177726 (22:39950346 T>C), RS1000228368 (22:39902929 A>G,T), RS1000235966 (22:39947663 A>T), RS1000238583 (22:39965578 A>G), RS1000293494 (22:39896115 A>T), RS1000317165 (22:39915717 G>A,T), RS1000324088 (22:39896507 G>A), RS1000387023 (22:39940896 G>A,C), RS1000411707 (22:39962084 A>G), RS1000459386 (22:39906783 G>A,T), RS1000477695 (22:39953431 A>G), RS1000521111 (22:39948860 T>A), RS1000552458 (22:39906570 A>G)

Disease associations

OMIM: gene MIM:604518 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

0 total (0 of 0 shown, HPO-id order):

GWAS associations

2 associations (top):

StudyTraitp-value
GCST005752_107Systemic lupus erythematosus5.000000e-08
GCST005951_24Body mass index2.000000e-08

EFO canonical traits (1, from GWAS)

EFO IDTrait name
EFO:0004340body mass index

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

PharmGKB: 1 entry (VIP=true, CPIC=false)

CTD chemical–gene interactions

26 total (human), top 26 by PubMed support.

ChemicalActions (top 5)PubMed papers
lasiocarpineincreases expression1
triphenyl phosphateaffects expression1
sodium arseniteincreases expression1
benzo(e)pyreneincreases methylation1
aflatoxin B2increases methylation1
S-(1,2-dichlorovinyl)cysteineincreases expression, affects cotreatment, decreases expression, affects response to substance1
di-n-butylphosphoric acidaffects expression1
CGP 52608affects binding, increases reaction1
Air Pollutantsincreases abundance, increases expression1
Benzo(a)pyreneaffects methylation1
Dichlorodiphenyl Dichloroethyleneincreases expression1
Demecolcinedecreases expression1
Dexamethasoneincreases expression1
Diurondecreases expression1
Estradiolaffects cotreatment, increases expression1
Ethyl Methanesulfonatedecreases expression1
Formaldehydedecreases expression1
Lipopolysaccharidesdecreases expression, affects response to substance, increases expression, affects cotreatment1
Methapyrileneincreases methylation1
Methyl Methanesulfonatedecreases expression1
Phthalic Acidsincreases methylation1
Triclosandecreases expression1
Vincristinedecreases expression1
Aflatoxin B1increases methylation1
Asbestos, Crocidoliteaffects expression1
Particulate Matterincreases expression, increases abundance1

Clinical trials (associated diseases)

0 trials via MONDO — disease-level, not drug-specific.

No linked Atlas pages yet — the cross-entity mesh grows as the corpus expands.