Fibrinogen gamma chain, also known as fibrinogen gamma gene (FGG), is a human gene found on chromosome 3.[5]
The protein encoded by this gene is the gamma component of fibrinogen, a blood-borne glycoprotein composed of three pairs of nonidentical polypeptide chains. Following vascular injury, fibrinogen is cleaved by thrombin to form fibrin which is the most abundant component of blood clots. In addition, various cleavage products of fibrinogen and fibrin regulate cell adhesion and spreading, display vasoconstrictor and chemotactic activities, and are mitogens for several cell types. Mutations in this gene lead to several disorders, including dysfibrinogenemia, hypofibrinogenemia and thrombophilia.[6] Alternative splicing of the mRNA chain results in two transcript variants; the common γA chain and the alternatively spliced γ' chain. Approximately 10% of the total plasma fibrinogen consists of γA/γ' fibrinogen, with <1% consisting of γ'/γ' fibrinogen. Increased and decreased levels of γA/γ' fibrinogen have been associated with coronary artery disease and deep vein thrombosis respectively.
In the lung parenchyma of smokers, upregulation of FGG transcript levels has been reported. [7]
Scott EM, Ariëns RA, Grant PJ (2005). "Genetic and environmental determinants of fibrin structure and function: relevance to clinical disease". Arterioscler. Thromb. Vasc. Biol. 24 (9): 1558–66. doi:10.1161/01.ATV.0000136649.83297.bf. PMID15217804. S2CID21298700.
1fib: RECOMBINANT HUMAN GAMMA-FIBRINOGEN CARBOXYL TERMINAL FRAGMENT (RESIDUES 143-411) BOUND TO CALCIUM AT PH 6.0
1fic: STRUCTURE OF HUMAN GAMMA FIBRINOGEN 30 KD CARBOXYL TERMINAL FRAGMENT
1fid: STRUCTURE OF HUMAN GAMMA FIBRINOGEN 30 KD CARBOXYL TERMINAL FRAGMENT
1fza: CRYSTAL STRUCTURE OF FIBRINOGEN FRAGMENT D
1fzb: CRYSTAL STRUCTURE OF CROSSLINKED FRAGMENT D
1fzc: CRYSTAL STRUCTURE OF FRAGMENT DOUBLE-D FROM HUMAN FIBRIN WITH TWO DIFFERENT BOUND LIGANDS
1fze: CRYSTAL STRUCTURE OF FRAGMENT DOUBLE-D FROM HUMAN FIBRIN
1fzf: CRYSTAL STRUCTURE OF FRAGMENT DOUBLE-D FROM HUMAN FIBRIN WITH THE PEPTIDE LIGAND GLY-HIS-ARG-PRO-AMIDE
1fzg: CRYSTAL STRUCTURE OF FRAGMENT D FROM HUMAN FIBRINOGEN WITH THE PEPTIDE LIGAND GLY-HIS-ARG-PRO-AMIDE
1lt9: Crystal Structure of Recombinant Human Fibrinogen Fragment D
1ltj: Crystal Structure of Recombinant Human Fibrinogen Fragment D with the Peptide Ligands Gly-Pro-Arg-Pro-Amide and Gly-His-Arg-Pro-Amide
1n86: Crystal structure of human D-dimer from cross-linked fibrin complexed with GPR and GHRPLDK peptide ligands.
1n8e: Fragment Double-D from Human Fibrin
1re3: Crystal Structure of Fragment D of BbetaD398A Fibrinogen with the Peptide Ligand Gly-His-Arg-Pro-Amide
1re4: Crystal Structure of Fragment D of BbetaD398A Fibrinogen
1rf0: Crystal Structure of Fragment D of gammaE132A Fibrinogen
1rf1: Crystal Structure of Fragment D of gammaE132A Fibrinogen with the Peptide Ligand Gly-His-Arg-Pro-amide
2a45: Crystal structure of the complex between thrombin and the central ""E"" region of fibrin
2ffd: Fibrinogen Fragment D with ""A"" knob peptide mimic GPRVVE
2fib: RECOMBINANT HUMAN GAMMA-FIBRINOGEN CARBOXYL TERMINAL FRAGMENT (RESIDUES 143-411) COMPLEXED TO THE PEPTIDE GLY-PRO-ARG-PRO AT PH 6.0
2h43: Crystal Structure of Human Fragment D Complexed with Ala-His-Arg-Pro-amide
2hod: Crystal Structure of Fragment D from Human Fibrinogen Complexed with Gly-hydroxyPro-Arg-Pro-amide
2hpc: Crystal structure of fragment D from Human Fibrinogen Complexed with Gly-Pro-Arg-Pro-amide.
2oyh: Crystal Structure of Fragment D of gammaD298,301A Fibrinogen with the Peptide Ligand Gly-His-Arg-Pro-Amide
2oyi: Crystal Structure of Fragment D of gammaD298,301A Fibrinogen with the Peptide Ligand Gly-Pro-Arg-Pro-Amide
3fib: RECOMBINANT HUMAN GAMMA-FIBRINOGEN CARBOXYL TERMINAL FRAGMENT (RESIDUES 143-411) BOUND TO CALCIUM AT PH 6.0: A FURTHER REFINEMENT OF PDB ENTRY 1FIB, AND DIFFERS FROM 1FIB BY THE MODELLING OF A CIS PEPTIDE BOND BETWEEN RESIDUES K338 AND C339
