Fibronectin, Bovine (fn1) Active Protein

Function: Fibronectins bind cell surfaces and various compounds including collagen, fibrin, heparin, DNA, and actin. Fibronectins are involved in cell adhesion, cell motility, opsonization, wound healing, and maintenance of cell shape. May be involved in osteoblast compaction

By similarity.

Subunit structure: Dimers or multimers of alternatively spliced variants, connected by 2 disulfide bonds near the carboxyl ends

By similarity.

Tissue specificity: In early Xenopus embryo, cellular forms of fibronectin predominate which include both extra domains. In fibronectin of embryonic and adult liver the connecting strand 3 can be either completely excluded or included.

Post-translational modification: Forms covalent cross-links mediated by a transglutaminase, such as F13A or TGM2, between a glutamine and the epsilon-amino group of a lysine residue, forming homopolymers and heteropolymers (e.g. fibrinogen-fibronectin, collagen-fibronectin heteropolymers).

Sequence similarities: Contains 12 fibronectin type-I domains.Contains 2 fibronectin type-II domains.Contains 17 fibronectin type-III domains.