F13A1 Gene

What is the F13A1 gene?

F13A1 encodes coagulation factor xiii a chain, a protein involved in fibrin crosslinking. It belongs to the Coagulation category and is part of the Coagulation & Vascular biological cluster. Factor XIII (FXIII) crosslinks fibrin to form a stable clot and protects fibrin from fibrinolysis. The Val34Leu (rs5985) polymorphism affects FXIII activation rate by thrombin.

Biological role and pathway

F13A1 is involved in the fibrin crosslinking 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 F13A1 gene have been studied in relation to coagulation and chronic illness. Each variant represents a single nucleotide position where individuals may carry different alleles.

• rs5985— F13A1 variant
• rs1800789— F13A1 variant
• rs4524— F13A1 variant

Conditions studied in relation to F13A1

Research into F13A1 variants has explored associations with the following conditions. These are areas of scientific investigation and do not imply that F13A1 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 F13A1 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

F13A1 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