ITGA2B integrin subunit alpha 2b [Homo sapiens (human)] - Gene

Summary

Official Symbol: ITGA2Bprovided by HGNC
Official Full Name: integrin subunit alpha 2bprovided by HGNC
Primary source: HGNC:HGNC:6138
See related: Ensembl:ENSG00000005961 MIM:607759; AllianceGenome:HGNC:6138
Gene type: protein coding
RefSeq status: REVIEWED
Organism: Homo sapiens
Lineage: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as: GT; GT1; GTA; CD41; GP2B; HPA3; CD41B; GPIIb; BDPLT2; FMAIT2; BDPLT16; PPP1R93
Summary: This gene encodes a member of the integrin alpha chain family of proteins. The encoded preproprotein is proteolytically processed to generate light and heavy chains that associate through disulfide linkages to form a subunit of the alpha-IIb/beta-3 integrin cell adhesion receptor. This receptor plays a crucial role in the blood coagulation system, by mediating platelet aggregation. Mutations in this gene are associated with platelet-type bleeding disorders, which are characterized by a failure of platelet aggregation, including Glanzmann thrombasthenia. [provided by RefSeq, Jan 2016]
Expression: Biased expression in bone marrow (RPKM 6.2), testis (RPKM 1.4) and 8 other tissues See more
Orthologs: mouse all
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Genomic context

Location:: 17q21.31

Exon count:: 30

Annotation release	Status	Assembly	Chr	Location
RS_2025_08	current	GRCh38.p14 (GCF_000001405.40)	17	NC_000017.11 (44372181..44389649, complement)
RS_2025_08	current	T2T-CHM13v2.0 (GCF_009914755.1)	17	NC_060941.1 (45226172..45243631, complement)
RS_2024_09	previous assembly	GRCh37.p13 (GCF_000001405.25)	17	NC_000017.10 (42449549..42467017, complement)

Chromosome 17 - NC_000017.11 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Go to reference sequence details

Genomic Sequence:

Go to nucleotide: Graphics FASTA GenBank

Expression

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See details

Project title: Tissue-specific circular RNA induction during human fetal development
Description: 35 human fetal samples from 6 tissues (3 - 7 replicates per tissue) collected between 10 and 20 weeks gestational time were sequenced using Illumina TruSeq Stranded Total RNA
BioProject: PRJNA270632
Publication: PMID 26076956
Analysis date: Mon Apr 2 22:54:59 2018

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Full-length alphaIIbbeta3 cryo-EM structure reveals intact integrin initiate-activation intrinsic architecture.
Title: Full-length αIIbβ3 cryo-EM structure reveals intact integrin initiate-activation intrinsic architecture.
[Pedigree Analysis and Molecular Mechanism Study of Hereditary Glanzmann Thrombasthenia Caused by Compound Heterozygous Mutation of the ITGA2B Gene].
Title: [Pedigree Analysis and Molecular Mechanism Study of Hereditary Glanzmann Thrombasthenia Caused by Compound Heterozygous Mutation of the ITGA2B Gene].
Molecular dynamics simulations corroborate recombinant expression studies carried out on three alphaIIb beta-propeller mutations reported in Indian Glanzmann thrombasthenia patients.
Title: Molecular dynamics simulations corroborate recombinant expression studies carried out on three αIIb β-propeller mutations reported in Indian Glanzmann thrombasthenia patients.
Complement C3b contributes to Escherichia coli-induced platelet aggregation in human whole blood.
Title: Complement C3b contributes to Escherichia coli-induced platelet aggregation in human whole blood.
New alphaIIbbeta3 variants in 28 Turkish Glanzmann patients; structural hypothesis for complex activation by residues variations in I-EGF domains.
Title: New αIIbβ3 variants in 28 Turkish Glanzmann patients; structural hypothesis for complex activation by residues variations in I-EGF domains.
Ectopic Expression of FVIII in HPCs and MSCs Derived from hiPSCs with Site-Specific Integration of ITGA2B Promoter-Driven BDDF8 Gene in Hemophilia A.
Title: Ectopic Expression of FVIII in HPCs and MSCs Derived from hiPSCs with Site-Specific Integration of ITGA2B Promoter-Driven BDDF8 Gene in Hemophilia A.
Nonsense-mediated mRNA decay efficiency influences bleeding severity in ITGA2B c.2659C > T (p.Q887X) knock-in mice.
Title: Nonsense-mediated mRNA decay efficiency influences bleeding severity in ITGA2B c.2659C > T (p.Q887X) knock-in mice.
Identification of three novel pathogenic ITGA2B and one novel pathogenic ITGB3 mutations in patients with hereditary Glanzmann's thrombasthenia living in Eastern Turkey.
Title: Identification of three novel pathogenic ITGA2B and one novel pathogenic ITGB3 mutations in patients with hereditary Glanzmann's thrombasthenia living in Eastern Turkey.
An alternate covalent form of platelet alphaIIbbeta3 integrin that resides in focal adhesions and has altered function.
Title: An alternate covalent form of platelet αIIbβ3 integrin that resides in focal adhesions and has altered function.
ITGA2, LAMB3, and LAMC2 may be the potential therapeutic targets in pancreatic ductal adenocarcinoma: an integrated bioinformatics analysis.
Title: ITGA2, LAMB3, and LAMC2 may be the potential therapeutic targets in pancreatic ductal adenocarcinoma: an integrated bioinformatics analysis.

Submit: New GeneRIF Correction See all GeneRIFs (286)

Phenotypes

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Find tests for this gene in the NIH Genetic Testing Registry (GTR)

Review eQTL and phenotype association data in this region using PheGenI

Associated conditions

Description	Tests
FETOMATERNAL ALLOIMMUNE THROMBOCYTOPENIA 2 MedGen: CN379740 OMIM: 621266 GeneReviews: Not available	not available
Glanzmann thrombasthenia 1 MedGen: CN300358 OMIM: 273800 GeneReviews: Not available	Compare labs
Platelet-type bleeding disorder 16 MedGen: C5442010 OMIM: 187800 GeneReviews: Not available	Compare labs

EBI GWAS Catalog

Description
New gene functions in megakaryopoiesis and platelet formation. EBI GWAS Catalog EBI GWAS CatalogPubMed

Variation

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See variants in ClinVar

See studies and variants in dbVar

See Variation Viewer (GRCh37.p13)

See Variation Viewer (GRCh38)

Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Markers

GDB:178576 (e-PCR)
- UniSTS:155028

D17S2050 (e-PCR)
- UniSTS:47523

GDB:180940 (e-PCR)
- UniSTS:155133

Gene Ontology Provided by GOA

Function	Evidence Code	Pubs
contributes_to cell adhesion receptor activity	IDA Inferred from Direct Assay more info	PubMed
enables extracellular matrix binding	IEA Inferred from Electronic Annotation more info
enables fibrinogen binding	IEA Inferred from Electronic Annotation more info
enables identical protein binding	IPI Inferred from Physical Interaction more info	PubMed
enables metal ion binding	IEA Inferred from Electronic Annotation more info
enables molecular adaptor activity	EXP Inferred from Experiment more info	PubMed
enables protein binding	IPI Inferred from Physical Interaction more info	PubMed
enables signaling receptor activity	IBA Inferred from Biological aspect of Ancestor more info

Process	Evidence Code	Pubs
involved_in angiogenesis	IBA Inferred from Biological aspect of Ancestor more info
involved_in cell adhesion	IEA Inferred from Electronic Annotation more info
involved_in cell-cell adhesion	IBA Inferred from Biological aspect of Ancestor more info
involved_in cell-cell adhesion mediated by integrin	IDA Inferred from Direct Assay more info	PubMed
involved_in cell-matrix adhesion	IBA Inferred from Biological aspect of Ancestor more info
acts_upstream_of_or_within cell-matrix adhesion	IEA Inferred from Electronic Annotation more info
involved_in cell-matrix adhesion	NAS Non-traceable Author Statement more info	PubMed
involved_in heterotypic cell-cell adhesion	IDA Inferred from Direct Assay more info	PubMed
involved_in integrin-mediated signaling pathway	HDA more info	PubMed
involved_in integrin-mediated signaling pathway	IBA Inferred from Biological aspect of Ancestor more info
involved_in integrin-mediated signaling pathway	IEA Inferred from Electronic Annotation more info
involved_in integrin-mediated signaling pathway	NAS Non-traceable Author Statement more info	PubMed
involved_in positive regulation of leukocyte migration	IEA Inferred from Electronic Annotation more info

Component	Evidence Code	Pubs
located_in blood microparticle	HDA more info	PubMed
located_in cell surface	HDA more info	PubMed
is_active_in cell surface	IBA Inferred from Biological aspect of Ancestor more info
located_in cell surface	IEA Inferred from Electronic Annotation more info
located_in external side of plasma membrane	IEA Inferred from Electronic Annotation more info
located_in extracellular exosome	IDA Inferred from Direct Assay more info	PubMed
located_in focal adhesion	IEA Inferred from Electronic Annotation more info
part_of integrin alphaIIb-beta3 complex	IBA Inferred from Biological aspect of Ancestor more info
part_of integrin alphaIIb-beta3 complex	IDA Inferred from Direct Assay more info	PubMed
part_of integrin alphaIIb-beta3 complex	IPI Inferred from Physical Interaction more info	PubMed
part_of integrin complex	IEA Inferred from Electronic Annotation more info
located_in membrane	IEA Inferred from Electronic Annotation more info
is_active_in plasma membrane	IDA Inferred from Direct Assay more info	PubMed
located_in plasma membrane	TAS Traceable Author Statement more info
located_in platelet alpha granule membrane	TAS Traceable Author Statement more info

General protein information

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Preferred Names: integrin alpha-IIb

Names: GPalpha IIb; alphaIIb protein; integrin, alpha 2b (platelet glycoprotein IIb of IIb/IIIa complex, antigen CD41); platelet fibrinogen receptor, alpha subunit; platelet glycoprotein IIb of IIb/IIIa complex; platelet membrane glycoprotein IIb; platelet-specific antigen BAK; protein phosphatase 1, regulatory subunit 93

NCBI Reference Sequences (RefSeq)

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.