INVESTIGADORES
KORNBLIHTT Alberto Rodolfo
artículos
Título:
Expression of the cell-binding domain of human fibronectin in E. coli. Identification of sequences promoting full to minimal adhesive function.
Autor/es:
OBARA, M; KANG M S; ROCHER-DUFOUR, S; KORNBLIHTT AR; THIERY, J. P; YAMADA KM
Revista:
FEBS LETTERS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 1987 p. 261 - 264
ISSN:
0014-5793
Resumen:
Two cDNA subfragments containing the cell-attachment site of human fibronectin (FN) were expressed as beta-galactosidase fusion proteins in E. coli. The products were purified to homogeneity by monoclonal antibody affinity chromatography and assayed for activity in a standard cell-adhesion assay. A fusion protein containing an 80 kDa fragment of human FN appeared functionally equivalent to intact FN purified from human plasma, whereas a truncated fusion protein of 33 kDa still containing a previously postulated cell-attachment site was approx. 50-fold less active. Our study establishes a system for analyzing adhesive protein function by DNA manipulation, rules out any major role for eukaryotic post-translational modifications in FN adhesive function, and localizes additional functional activity to a 1.3 kb region.