Six Distinct Nuclear Factors Interact with the 75-base-pair Repeat of the Moloney Murine Leukemia Virus Enhancer

Overview

Journal Mol Cell Biol

Specialty Cell Biology

Date 1987 Mar 1

PMID 3561410

Citations 143

Authors

N A Speck

D Baltimore

Affiliations

Soon will be listed here.

Abstract

Binding sites for six distinct nuclear factors on the 75-base-pair repeat of the Moloney murine leukemia virus enhancer have been identified by an electrophoretic mobility shift assay combined with methylation interference. Three of these factors, found in WEHI 231 nuclear extracts, which we have named LVa, LVb, and LVc (for leukemia virus factors a, b, and c) have not been previously identified. Nuclear factors that bind to the conserved simian virus 40 corelike motif, the NF-1 motif, and the glucocorticoid response element were also detected. Testing of multiple cell lines showed that most factors appeared ubiquitous, except that the NF-1 binding factor was found neither in nuclear extracts from MEL cells nor in the embryonal carcinoma cell lines PCC4 and F9, and core-binding factor was relatively depleted from MEL and F9 nuclear extracts.

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