ITGA2
integrin subunit alpha 2 | GPIa, HPA-5, VLAA2, CD49B

This gene encodes the alpha subunit of a transmembrane receptor for collagens and related proteins. The encoded protein forms a heterodimer with a beta subunit and mediates the adhesion of platelets and other cell types to the extracellular matrix. Loss of the encoded protein is associated with bleeding disorder platelet-type 9. Antibodies against this protein are found in several immune disorders, including neonatal alloimmune thrombocytopenia. This gene is located adjacent to a related alpha subunit gene. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2012]

Developmental clusters: GC4
Biological processes 79 terms
amyloid-beta binding (GO:0001540)amyloid-beta binding (GO:0001540)animal organ morphogenesis (GO:0009887)axon (GO:0030424)axon terminus (GO:0043679)basal part of cell (GO:0045178)blood coagulation (GO:0007596)cell adhesion (GO:0007155)cell adhesion (GO:0007155)cell adhesion mediated by integrin (GO:0033627)cell surface (GO:0009986)cell surface (GO:0009986)cell surface (GO:0009986)cell surface (GO:0009986)cell-cell adhesion (GO:0098609)cell-matrix adhesion (GO:0007160)cell-matrix adhesion (GO:0007160)cell-matrix adhesion (GO:0007160)cell-matrix adhesion (GO:0007160)cell-substrate adhesion (GO:0031589)cellular response to estradiol stimulus (GO:0071392)cellular response to mechanical stimulus (GO:0071260)collagen binding (GO:0005518)collagen binding (GO:0005518)collagen binding (GO:0005518)collagen binding involved in cell-matrix adhesion (GO:0098639)collagen receptor activity (GO:0038064)collagen-activated signaling pathway (GO:0038065)detection of mechanical stimulus involved in sensory perception of pain (GO:0050966)external side of plasma membrane (GO:0009897)extracellular matrix organization (GO:0030198)female pregnancy (GO:0007565)focal adhesion (GO:0005925)focal adhesion (GO:0005925)focal adhesion (GO:0005925)focal adhesion assembly (GO:0048041)heparan sulfate proteoglycan binding (GO:0043395)hepatocyte differentiation (GO:0070365)hypotonic response (GO:0006971)integrin alpha2-beta1 complex (GO:0034666)integrin alpha2-beta1 complex (GO:0034666)integrin binding (GO:0005178)integrin complex (GO:0008305)integrin complex (GO:0008305)integrin-mediated signaling pathway (GO:0007229)integrin-mediated signaling pathway (GO:0007229)integrin-mediated signaling pathway (GO:0007229)laminin binding (GO:0043236)mammary gland development (GO:0030879)membrane (GO:0016020)mesodermal cell differentiation (GO:0048333)perinuclear region of cytoplasm (GO:0048471)plasma membrane (GO:0005886)plasma membrane (GO:0005886)positive regulation of cell adhesion (GO:0045785)positive regulation of cell projection organization (GO:0031346)positive regulation of collagen biosynthetic process (GO:0032967)positive regulation of epithelial cell migration (GO:0010634)positive regulation of leukocyte migration (GO:0002687)positive regulation of phagocytosis, engulfment (GO:0060100)positive regulation of positive chemotaxis (GO:0050927)positive regulation of smooth muscle cell migration (GO:0014911)positive regulation of smooth muscle cell proliferation (GO:0048661)positive regulation of smooth muscle contraction (GO:0045987)positive regulation of translation (GO:0045727)positive regulation of transmission of nerve impulse (GO:0051971)presynapse (GO:0098793)protein binding (GO:0005515)protein-containing complex binding (GO:0044877)protein-containing complex binding (GO:0044877)response to L-ascorbic acid (GO:0033591)response to amine (GO:0014075)response to hypoxia (GO:0001666)response to muscle activity (GO:0014850)response to parathyroid hormone (GO:0071107)response to xenobiotic stimulus (GO:0009410)signaling receptor activity (GO:0038023)skin morphogenesis (GO:0043589)substrate-dependent cell migration (GO:0006929)
Expression (TPM)
ITGA2 — as a Regulated Gene

TFs regulating ITGA2 0 TFs

Transcription factors with Perturb-seq knockdown data for ITGA2. The Binding column indicates whether any binding evidence exists for this TF–gene pair (ChIP-seq or motif footprint peaks). The Mean coef is the average Perturb-seq regression coefficient across active gRNAs (positive = ITGA2 upregulated upon KD; negative = downregulated). The Outlier column indicates whether this gene is in the top or bottom 5% of all TF knockdown effects.

Data: Effect:
TF Mean coef Binding Outlier TF→Gene link

Elements linked to ITGA2

Open chromatin peaks (ATAC-seq) in the genomic neighbourhood of ITGA2, linked by TSS proximity or chromatin conformation (Multiome / HiCAR). Each element overlaps at least one TF ChIP-seq binding site — the TFs column shows how many distinct TFs bind that element.

Accessibility Element Dist. to TSS Link type TFs
chr5:52,786,801–52,788,836 201.2 kb Distal (>10kb) Multiome 833
chr5:52,799,077–52,801,097 189.2 kb Distal (>10kb) Multiome 910
chr5:52,988,570–52,990,478 5 bp At TSS Multiome 746
chr5:53,109,043–53,110,555 120.4 kb Distal (>10kb) Multiome 759

Genome Browser

Genomic view of the ITGA2 locus showing ATAC-seq accessibility and RNA-seq expression across the ESC → DE time course, together with TF binding peaks and element-to-TSS loop connections.

chr5:52,776,801 – 53,120,555
Proximal 1 kb Distal 10 kb Multiome HiCAR ATAC-seq RNA-seq