Fibrin

File:1n73b.png

Crystal Structure of Fibrin from Petromyzon marinus, 1n73

Fibrin (or Factor Ia, FIa) is a fibrous protein which when polymerized is involved in blood clotting. The polymerization epitopes of FIa are called A-knob and B-knob. Fibrinogen (Factor I, FI) is converted by thrombin to fibrin. Limited proteolysis of FI results in a fragment named D which when cross-linked by factor XIII is called double-D FIa (DDFIa). The images at the left and at the right correspond to one representative Fibrin, i.e. the crystal structure of Fibrin from Petromyzon marinus (1n73).

3D Structures of Fibrin

3h32 – hFIa peptide+ hFI α, β, γ chains – human
2q9i, 2z4e - hFIa B-knob+ hFI α, β, γ chains
2hlo, 1n86 - hFIa α, β, γ chains + peptide
1n8e - hFIa α, β, γ chains
1n73 - FIa α, β, γ chains + peptide – Sea lamprey
1fzc – hDDFIa+peptide

Proteopedia Page Contributors and Editors (what is this?)

Alexander Berchansky, Michal Harel