ITGB3 Gene

What is the ITGB3 gene?

ITGB3 encodes integrin subunit beta 3, a protein involved in platelet aggregation. It belongs to the Coagulation category and is part of the Coagulation & Vascular biological cluster. ITGB3 forms αIIbβ3 (GPIIb-IIIa) on platelets — the most abundant platelet surface protein and the final common pathway for platelet aggregation through fibrinogen binding. The PlA2 (Leu33Pro, rs5918) variant affects thrombotic risk.

Biological role and pathway

ITGB3 is involved in the platelet aggregation pathway, which plays a central role in regulating physiological processes relevant to immune defence, cellular energy, and systemic homeostasis. Genes within the Coagulation & Vascular cluster work together to maintain balanced function across interconnected biological systems.

Variants in genes within this pathway may influence an individual's predisposition to altered function in these systems — particularly under conditions of physiological stress such as viral infection or prolonged illness.

Known genetic variants

The following variants (SNPs) in the ITGB3 gene have been studied in relation to coagulation and chronic illness. Each variant represents a single nucleotide position where individuals may carry different alleles.

• rs5918— ITGB3 variant
• rs3025058— ITGB3 variant
• rs4642— ITGB3 variant

Conditions studied in relation to ITGB3

Research into ITGB3 variants has explored associations with the following conditions. These are areas of scientific investigation and do not imply that ITGB3 causes or treats any condition.

Genetic insights from DNA data

Consumer DNA files from 23andMe, AncestryDNA, and MyHeritage contain raw SNP data. When you upload your file to ChronicDNA, the analysis engine checks your genotype against a curated panel of 80+ genes selected for their relevance to Long COVID, ME/CFS, and connected biological pathways - some of which may include ITGB3 and related genes in the coagulation & vascular pathway.

The report is educational - it explains which variants you carry, what the research says about them, and how they fit into the biological pathways most relevant to chronic illness. Results are presented in plain English with appropriate scientific context, no medical jargon, no scare tactics. All results should be discussed with a qualified healthcare provider.

Related genes in the Coagulation & Vascular pathway

ITGB3 does not act in isolation. The following genes are functionally related and may be analysed together for a more complete picture of your genetic predispositions.

Frequently asked questions