| Fibronectin, type I | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||||
| Symbol | Fibrnctn1 | ||||||||||
| Pfam | PF00039 | ||||||||||
| InterPro | IPR000083 | ||||||||||
| SMART | SM00058 | ||||||||||
| PROSITE | PDOC00965 | ||||||||||
| CDD | cd00061 | ||||||||||
| |||||||||||
Fibronectin, type I repeats are one of the three repeats found in the fibronectin protein. Fibronectin is a plasma protein that binds cell surfaces and various compounds including collagen, fibrin, heparin, DNA, and actin. Type I domain (FN1) is approximately 40 residues in length. Four conserved cysteines are involved in disulfide bonds. The 3D structure of the FN1 domain has been determined. It consists of two antiparallel beta-sheets, first a double-stranded one, that is linked by a disulfide bond to a triple-stranded beta-sheet. The second conserved disulfide bridge links the C-terminal adjacent strands of the domain.
In human tissue plasminogen activator chain A the FN1 domain together with the following epidermal growth factor (EGF)-like domain are involved in fibrin-binding. It has been suggested that these two modules form a single structural and functional unit. The two domains keep their specific tertiary structure, but interact intimately to bury a hydrophobic core; the inter-module linker makes up the third strand of the EGF-module's major beta-sheet.
Human proteins containing this domain
References
- Campbell ID, Baron M, Norman D, Willis A (1990). "Structure of the fibronectin type 1 module". Nature. 345 (6276): 642–646. doi:10.1038/345642a0. PMID 2112232. S2CID 4328182.
- Driscoll PC, Harvey TS, Campbell ID, Baron M, Dudgeon TJ, Downing AK, Smith BO (1992). "Solution structure of the fibrin binding finger domain of tissue-type plasminogen activator determined by 1H nuclear magnetic resonance". J. Mol. Biol. 225 (3): 821–833. doi:10.1016/0022-2836(92)90403-7. PMID 1602484.
- ^ Driscoll PC, Campbell ID, Dudgeon TJ, Downing AK, Smith BO (1995). "The solution structure and backbone dynamics of the fibronectin type I and epidermal growth factor-like pair of modules of tissue-type plasminogen activator". Structure. 3 (8): 823–833. doi:10.1016/S0969-2126(01)00217-9. PMID 7582899.
- Bennett WF, Paoni NF, Keyt BA, Botstein D, Presta L, Wurm FM, Zoller MJ, Jones AJ (1991). "High resolution analysis of functional determinants on human tissue-type plasminogen activator". J. Biol. Chem. 266 (8): 5191–5201. PMID 1900516.