Factor XIII Biology and Coagulation Disorders
Summary
Blood coagulation factor XIII (FXIII) is the final transglutaminase in the clotting cascade, responsible for cross-linking fibrin polymers and stabilising the haemostatic plug. In plasma it circulates as a heterotetramer (A2B2), whereas cellular pools of FXIII-A reside in platelets, monocytes and macrophages, contributing to both vascular and extravascular clot stability. Activation requires thrombin cleavage and calcium binding, triggering conformational changes that expose the active site. Congenital or acquired FXIII deficiency manifests as severe bleeding, impaired wound healing and elevated risk of re-bleeding, while dysregulated FXIII activity has been implicated in inflammation, fibrosis and cardiovascular disorders. Recent insights into activation mechanisms and extravascular roles have broadened understanding of FXIII’s contribution to coagulation disorders and tissue repair.
Research from Nature Portfolio
High-resolution structural studies have delineated three distinct calcium-binding sites within FXIII-A, revealing an antagonistic interplay that governs zymogen stability and enzyme activation. Thermodynamic profiling unpicked the role of solvent and ionic strength in the transition from dimer to active monomer, while mapping of substrate-binding interfaces has identified pharmacologically targetable pockets. Complementary structure–function analyses have charted the sequential cascade of thrombin-mediated cleavage, conformational shifts and A2B2 dissociation, clarifying the regulatory influence of B subunits on enzymatic activity. These foundational insights now underpin rational design of highly specific FXIII modulators.
Factor XIII Biology and Coagulation Disorders publication trend
The graph below shows the total number of articles in factor xiii biology and coagulation disorders across all publications each year (not limited to Nature Index journals).
Technical terms
Zymogen: An inactive enzyme precursor requiring proteolytic cleavage for activation.
Transglutaminase: An enzyme that creates covalent bonds between glutamine and lysine residues in proteins.
Heterotetramer: A protein complex composed of four subunits of two different types.
Allosteric inhibitor: A molecule that binds to a site distinct from the active site to modulate enzyme function.
Anion-binding site: A region on a protein that selectively interacts with negatively charged ions.
References
- Discovery of Heparin Mimetic, Potent, and Selective Inhibitors of Human Clotting Factor XIIIa. ACS Omega (2024).
- Differential Role of Factor XIII in Acute Myocardial Infarction and Ischemic Stroke. Biomedicines (2024).
- Structure functional insights into calcium binding during the activation of coagulation factor XIII A. Scientific Reports (2019).
- Revisiting the mechanism of coagulation factor XIII activation and regulation from a structure/functional perspective. Scientific Reports (2016).
- The impact of acquired coagulation factor XIII deficiency in traumatic bleeding and wound healing. Critical Care (2022).
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