Overexpression of the c-src protein does not induce transformation of NIH 3T3 cells.

Abstract:

:NIH 3T3 mouse cells were transfected with plasmids that induce efficient expression of either (i) the Rous sarcoma virus v-src gene, (ii) the chicken c-src gene, or (iii) a recombinant gene combining the 5' portion of c-src with the 3' end of v-src. Focus formation in tissue culture and formation of large colonies in soft agar did not occur in cells transfected with c-src. Cells transfected with c-src expression plasmids did not form foci but were isolated using a coselectable biological marker. They display morphological and substrate-independent growth characteristics intermediate between those of normal and v-src-transformed mouse cells, and lysates from these cells have enhanced in vitro tyrosine kinase activity. Transfection with the c-src-v-src recombinant induced focus formation with an efficiency similar to that obtained with a v-src expression plasmid. These results imply that v-src-induced transformation does not result just from overexpression of an essentially normal cellular protein but, at least in part, depends on the mutations distinguishing the cellular and viral proteins.

authors

Shalloway D,Coussens PM,Yaciuk P

doi

10.1073/pnas.81.22.7071

subject

Has Abstract

pub_date

1984-11-01 00:00:00

pages

7071-5

issue

22

eissn

0027-8424

issn

1091-6490

journal_volume

81

pub_type

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