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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | De Crombrugghe, B. Maity, S. N. Vuorio, T. |
| Description | Author Affiliation: Maity SN ( Department of Molecular Genetics, University of Texas, M. D. Anderson Cancer Center, Houston 77030.); |
| Abstract | CBF is a heteromeric mammalian transcription factor that binds to CCAAT sequences in a number of promoters such as the two type I collagen promoters, the albumin promoter, the major histocompatibility complex class II promoter, and others. It is composed of two components, A and B, that are both needed for DNA binding. We have isolated a rat cDNA containing the complete 341-amino acid coding sequence of the B component of CBF. Expression of this cDNA in vitro generates a polypeptide that shows the same dependency on the A component as the native B component in the formation of a complex with a CCAAT-containing DNA. The C-terminal portion of the B component from residue 260 to residue 312 shows a 75% sequence identity with a portion of the Hap2 protein, a component of a heteromeric CCAAT-binding protein in yeast. In contrast, the rest of the protein shows little sequence homology with Hap2, although both proteins contain glutamine-rich domains. In the B component of CBF this domain spans the amino-terminal 60% of the protein, whereas in Hap2 this domain is much smaller. Hence, only a few changes in one domain of this protein were tolerated during evolution between yeast and mammals, whereas the rest of the protein diverged much more extensively. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 14 |
| Volume Number | 87 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1990-08-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | CCAAT-Binding Factor DNA-Binding Proteins Genetics Fungal Proteins Saccharomyces Cerevisiae Transcription Factors Amino Acid Sequence Animals CCAAT-Enhancer-Binding Proteins Cell Nucleus Metabolism Chromatography, Affinity Cloning, Molecular Isolation & Purification Liver Macromolecular Substances Molecular Sequence Data Molecular Weight Oligonucleotide Probes Rats, Inbred Strains Sequence Homology, Nucleic Acid Comparative Study Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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