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Fibrinogen is a glycoprotein found in the blood that is converted into fibrin during blood coagulation. Fibrinogen is cleaved by another protein, thrombin, exposing knobs A and B to form fibrin. [1] It is this fibrin that forms clots to prevent excessive bleeding from wounds sustained. Clotting factors, like factor XIII, are often linked to fibrin. [2]
Fibrinogen is composed of 2 copies each of 3 non-identical chains α, β, γ (Fba, Fbb, Fbg).
- ↑ Betts L, Merenbloom BK, Lord ST. The structure of fibrinogen fragment D with the 'A' knob peptide GPRVVE. J Thromb Haemost. 2006 May;4(5):1139-41. PMID:16689770 doi:10.1111/j.1538-7836.2006.01902.x
- ↑ Muszbek L, Bagoly Z, Bereczky Z, Katona E. The involvement of blood coagulation factor XIII in fibrinolysis and thrombosis. Cardiovasc Hematol Agents Med Chem. 2008 Jul;6(3):190-205. PMID:18673233
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3D Structure of Fibrinogen
Updated on 21-January-2016
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- Fibrinogen α+β+γ chains
- thrombin, 3h32, 3e1i, 3bvh, 2hlo, 2hod, 2hpc, 2oyh, 2oyi, 2h43, 2ffd, 1re3, 1rf1, 1n86, 1ltj – hFba+hFbb+hFbg+peptide ligand – human
- 3ghg, 2q9i, 2z4e - hFba+hFbb+hFbg+knob A & B
- 2xnx, 2xny - hFba+hFbb+hFbg + M1 protein
- 2a45 - hFba+hFbb+hFbg+thrombin+PPACK thrombin inhibitor
- 1re4, 1rf0, 1n8e, 1lt9 - hFba+hFbb+hFbg
- 1jy3, 1deq – cFba+cFbb+cFbg – cow
- 1jy2 - cFba+cFbb+cFbg proteolytic fragment
- 1n73, 1lwu - Fba+Fbb+Fbg+peptide ligand – Sea lamprey
- 1m1j - heFba+heFbb+heFbg+peptide ligand – hen
- 1ei3 - heFba+heFbb+heFbg
- Fibrinogen α chain
- Fibrinogen β chain
- Fibrinogen γ chain
- 2vr3 – hFbg+SaClumping Factor A – Staphylococcus aureus
- 2vdo, 2vdp, 2vdq, 2vdr – hFbg+Integrin alpha IIB+Integrin beta-3+Monoclonal antibody heavy and light chains
- 2fib, 3fib - hFbg+peptide ligand
- 1fib – hFbg+Ca
- 1fic, 1fid – hFbg
- 3fib – hFbg C terminal
- 1dug – Fbg C-terminal/glutathione S-transferase – Schistosoma japonicum
- 2hwl – hFbg peptide+prothrombin
- 2y7l – hFbg + agglutinin-like protein
References
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