Premium
A comparative study of structural properties of fibronectin and its 180 kDa fragment
Author(s) -
Bushuev V.N.,
Metsis M.L.,
Morozkin A.D.,
Ruuge E.K.,
Sepetov N.F.,
Koteliansky V.E.
Publication year - 1985
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(85)81039-5
Subject(s) - fibronectin , chemistry , fragment (logic) , fibronectins , biochemistry , biophysics , nuclear magnetic resonance spectroscopy , stereochemistry , microbiology and biotechnology , cell , biology , computer science , programming language
Fibronectin from human plasma and its 180 kDa fragment which retained collagen‐binding, cell‐attachment and heparin‐binding activities, were studied by velocity centrifugation and 1 H‐NMR methods. The fibronectin hydrodynamic radius strongly increased at pH 11 while the hydrodynamic properties of the fragment did not change noticeably. 1 H‐NMR spectroscopy also showed differences in the molecular properties of fibronectin and its 180 kDa fragment. Under physiological conditions the structure of fibronectin differs from that of its 180 kDa fragment. At pH 11 and in 4 M urea no differences in their structures are observed. It is suggested that interdomain and intersubunit interactions play an important role in maintaining the native conformation of intact fibronectin.