Nonfunctional epidermal growth factor receptor in cells transformed by Kirsten sarcoma virus.

Abstract:

:The cell membrane receptor for epidermal growth factor (EGF) appears to be a glycoprotein of Mr 170,000 and mediates the mitogenic and metabolic responses of cells with EGF receptors (EGF-R). Normal rat kidney (NRK) have about 3 X 10(5) EGF-R per cell. Upon transformation of NRK cells by Kirsten sarcoma virus, the transformed derivative (KNRK) loses the ability to bind 125I-EGF. Membranes from NRK and KNRK cells were included in EGF-dependent phosphorylation reactions to search for evidence of the EGF-R. A phosphorylated protein of Mr 170,000 was detected in both NRK and KNRK membranes. The Mr 170,000 protein was identified to be EGF-R by immunoprecipitation with monoclonal antibody to the receptor. Furthermore, two-dimensional peptide mapping using trypsin and chymotrypsin digestions of the iodinated receptors from both NRK and KNRK cells showed essentially identical patterns. These data indicate that the EGF-R is present in KNRK cells with apparently the same protein structure as the NRK counterpart.

authors

Chua CC,Geiman DE,Schreiber AB,Ladda RL

doi

10.1016/0006-291x(84)91336-6

subject

Has Abstract

pub_date

1984-01-30 00:00:00

pages

538-47

issue

2

eissn

0006-291X

issn

1090-2104

pii

0006-291X(84)91336-6

journal_volume

118

pub_type

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