Source: PM23856902
Marked as 'Integral membrane protein'
Confidence: medium (present in either hRBCD or BSc_CH or PM22954596) Search PubMed for
(RBC AND this entry)

Gene names: ITGA2B , GP2B, ITGAB
Protein names and data: ITA2B_HUMAN , Integrin alpha-IIb , GPalpha IIb; GPIIb; Platelet membrane glycoprotein IIb; CD41; Integrin alpha-IIb heavy chain; Integrin alpha-IIb light chain, form 1; Integrin alpha-IIb light chain, form 2; Flags: Precursor Lenght: 1039 a.a.
Mass: 113377 Da
fasta formatted sequence

Function: Integrin alpha-IIb/beta-3 is a receptor for fibronectin, fibrinogen, plasminogen, prothrombin, thrombospondin and vitronectin. It recognizes the sequence R-G-D in a wide array of ligands. It recognizes the sequence H-H-L-G-G-G-A-K-Q-A-G-D-V in fibrinogen gamma chain. Following activation integrin alpha- IIb/beta-3 brings about platelet/platelet interaction through binding of soluble fibrinogen. This step leads to rapid platelet aggregation which physically plugs ruptured endothelial cell surface.
Cellular location: Membrane; Single-pass type I membrane protein.
Tissue specificity: Isoform 1 and isoform 2 were identified in platelets and megakaryocytes, but not in reticulocytes or in Jurkat and U-937 white blood cell line. Isoform 3 is expressed by leukemia, prostate adenocarcinoma and melanoma cells but not by platelets or normal prostate or breast epithelial cells.

Genetic variants

Position 874 is associated with platelet-specific alloantigen HPA-3/BAK/LEK. HPA-3A/BAK(A)/LEK(A) has Ile-874 and HPA-3B/BAK(B)/LEK(B) has Ser-874. HPA-3B is involved in neonatal alloimmune thrombocytopenia (NAIT or NATP).

Database cross-references

UniProt: P08514
Ensembl: ENST00000262407
Ensembl: ENST00000353281
MIM: 187800
MIM: 273800
MIM: 607759
neXtProt: NX_P08514
Antibodypedia: P08514 (may not find the protein thus also not any antibody)
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