PMID- 10390538 OWN - NLM STAT- MEDLINE DCOM- 19990903 LR - 20190501 IS - 0305-1048 (Print) IS - 0305-1048 (Linking) VI - 27 IP - 14 DP - 1999 Jul 15 TI - A human Raf-responsive zinc-finger protein that binds to divergent sequences. PG - 2947-56 AB - LZ321, a human liver cDNA, encodes a protein that bound to a Drosophila tramtrack binding site, GGTCCT. The sequence of LZ321 matched that of RREB1, a transcription factor that bound to a Ras responsive element (RRE) very different from the sequence with which we isolated LZ321. We therefore examined the binding of RREB1/LZ321 to different ligands. It bound to the GGTCCT-containing ligand and to the RRE with similar affinities (Kd50-60 nM), but did not bind to a consensus RREB1 binding site. The RREB1/LZ321 protein contains four C2H2zinc-fingers, the C-terminal two of which retained specific DNA binding to both ligands. A trimer of the GGTCCT site functioned as an enhancer in both CV-1 and H4IIE-C3 cells. Thus RREB1/LZ321 could function as a downstream activator in the Ras-Raf signaling pathway through different cis -acting elements. A longer human protein, Finb, contains RREB1/LZ321, and there are close homologs in both chicken and Drosophila, arguing that it plays important roles. The ability of transcription factors such as RREB1/LZ321 to bind diverse sequences gives them the potential to regulate previously unsuspected genes. FAU - Zhang, L AU - Zhang L AD - Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202-5122, USA. FAU - Zhao, J AU - Zhao J FAU - Edenberg, H J AU - Edenberg HJ LA - eng SI - GENBANK/AF072825 SI - GENBANK/AF072826 GR - AA06460/AA/NIAAA NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - Nucleic Acids Res JT - Nucleic acids research JID - 0411011 RN - 0 (DNA-Binding Proteins) RN - 0 (Drosophila Proteins) RN - 0 (RREB1 protein, human) RN - 0 (Repressor Proteins) RN - 0 (Transcription Factors) RN - 0 (ttk protein, Drosophila) RN - 9007-49-2 (DNA) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-raf) RN - EC 3.6.5.2 (ras Proteins) SB - IM MH - Animals MH - Base Sequence MH - Binding Sites MH - Cell Line MH - Cloning, Molecular MH - DNA/genetics/*metabolism MH - DNA Footprinting MH - DNA-Binding Proteins/chemistry/genetics/*metabolism MH - *Drosophila Proteins MH - Drosophila melanogaster/genetics MH - Enhancer Elements, Genetic/genetics MH - Humans MH - Liver/metabolism MH - Molecular Sequence Data MH - Proto-Oncogene Proteins c-raf/*physiology MH - Repressor Proteins/genetics MH - Response Elements/*genetics MH - Signal Transduction MH - Transcription Factors/chemistry/genetics/*metabolism MH - Transcriptional Activation MH - Transfection MH - *Zinc Fingers MH - ras Proteins/physiology PMC - PMC148511 EDAT- 1999/07/03 00:00 MHDA- 1999/07/03 00:01 CRDT- 1999/07/03 00:00 PHST- 1999/07/03 00:00 [pubmed] PHST- 1999/07/03 00:01 [medline] PHST- 1999/07/03 00:00 [entrez] AID - gkc457 [pii] AID - 10.1093/nar/27.14.2947 [doi] PST - ppublish SO - Nucleic Acids Res. 1999 Jul 15;27(14):2947-56. doi: 10.1093/nar/27.14.2947.