Abstract
The protooncogene c-jun encodes a component of the transcription factor AP-1. Both murine c-jun and a related gene (jun-B) are rapidly activated in BALB/c3T3 cells by serum growth factors. We report here the cloning and analysis of a cDNA encoding a third member of the murine jun family, jun-D. The amino acid sequence encoded by jun-D has two extensive regions of homology with the other Jun proteins. One homology region includes the DNA-binding domain and sequences required for dimer formation and interaction with the Fos oncoprotein; the other includes the acidic sequence thought to be involved in gene activation. All three jun mRNAs are present in a variety of murine tissues and cell lines. In resting 3T3 cells, jun-D is expressed at a higher level compared to c-jun and jun-B, and its transcription is stimulated only slightly by serum growth factors. Thus, jun-D appears to be regulated differently than c-jun and jun-B.
MeSH Terms
Amino Acid Sequence
Animals
Base Sequence
Cells, Cultured
DNA, Recombinant/isolation & purification
DNA-Binding Proteins/genetics
Mice
Molecular Sequence Data
Proto-Oncogene Proteins/genetics
Proto-Oncogene Proteins c-jun
Proto-Oncogenes
RNA, Messenger/genetics
Sequence Homology, Nucleic Acid
Transcription Factors/genetics
Transcription, Genetic
Chemicals
DNA, Recombinant
DNA-Binding Proteins
Proto-Oncogene Proteins
Proto-Oncogene Proteins c-jun
RNA, Messenger
Transcription Factors
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Ryder K
Howard Hughes Medical Institute Laboratory, Johns Hopkins University School of Medicine, Baltimore, MD 21205.
Lanahan A
Perez-Albuerne E
Nathans D
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