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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Danon, A. Cohen, A. Yohn, C. B. Mayfield, S. P. |
| Description | Author Affiliation: Yohn CB ( Department of Cell Biology and The Skaggs Institute of Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.); |
| Abstract | High-affinity binding of a set of proteins with specificity for the 5' untranslated region (UTR) of the Chlamydomonas reinhardtii chloroplast psbA mRNA correlates with light-regulated translational activation of this message. We have isolated a cDNA encoding the main psbA RNA binding protein, RB47, and identified this protein as a member of the poly(A) binding protein family. Poly(A) binding proteins are a family of eukaryotic, cytoplasmic proteins thought to bind poly(A) tails of mRNAs and play a role in translational regulation. In vitro translation of RNA transcribed from the RB47 cDNA produces a precursor protein that is efficiently transported into the chloroplast and processed to the mature 47-kDa protein. RB47 expressed and purified from Escherichia coli binds to the psbA 5' UTR with similar specificity and affinity as RB47 isolated from C. reinhardtii chloroplasts. The identification of a normally cytoplasmic translation factor in the chloroplast suggests that the prokaryotic-like chloroplast translation machinery utilizes a eukaryotic-like initiation factor to regulate the translation of a key chloroplast mRNA. These data also suggest that poly(A) binding proteins may play a wider role in translation regulation than previously appreciated. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 5 |
| Volume Number | 95 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1998-04-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Chlamydomonas Reinhardtii Metabolism Chloroplasts Photosynthetic Reaction Center Complex Proteins Biosynthesis Protein Biosynthesis RNA, Messenger RNA-Binding Proteins Amino Acid Sequence Animals Binding Sites Cloning, Molecular Conserved Sequence Molecular Sequence Data Genetics Photosystem II Protein Complex Poly(A)-Binding Proteins Chemistry Receptors, Cytoplasmic And Nuclear Recombinant Proteins Sequence Alignment Sequence Homology, Amino Acid Transcription, Genetic Comparative Study Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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