PMID: 14992585 , Related PDB ids: 1RF0, 1RF1

Authors:

Kostelansky MS, Lounes KC, Ping LF, Dickerson SK, Gorkun OV, Lord ST

Title:

Calcium-binding site beta 2, adjacent to the "b" polymerization site, modulates lateral aggregation of protofibrils during fibrin polymerization.

Journal:

Biochemistry. 2004 Mar 9;43(9):2475-83.

Abstract:

Structural analysis of recombinant fibrinogen fragment D revealed that the calcium-binding site (beta2-site) composed of residues BbetaAsp261, BbetaAsp398, BbetaGly263, and gammaGlu132 is modulated by the "B:b" interaction. To determine the beta2-site's role in polymerization, we engineered variant fibrinogen gammaE132A in which calcium binding to the beta2-site was disrupted by replacing glutamic acid at gamma132 with alanine. We compared polymerization of gammaE132A to normal fibrinogen as a function of calcium concentration. Polymerization of gammaE132A at concentrations of calcium