title: A model for fibrinogen: domains and sequence.
abstract: Electron microscopy of rotary-shadowed fibrinogen demonstrates that the molecules modified for crystallization by limited cleavage with a bacterial protease retain the major features of the native structure. This evidence, together with image processing and x-ray analysis of the crystals and of fibrin, has been used to develop a three-dimensional low resolution model for the molecule. The data indicate that the two large end domains of the molecule would be composed of the carboxyl-terminus of the B beta chain (proximal) and gamma chain (distal), respectively; the carboxyl-terminus of the A alpha chain would fold back to form an additional central domain. On this basis, the carboxyl-terminal region of each of the three chains of fibrinogen is folded independently into a globular domain.
mesh_terms: D000595:Amino Acid Sequence; D001665:Binding Sites; D003201:Computers; D005340:Fibrinogen / Q000378:metabolism*; D008854:Microscopy, Electron; D008958:Models, Molecular; D011487:Protein Conformation
chemical_list: D005340:Fibrinogen