Structural highlights
3kt7 is a 1 chain structure with sequence from Atcc 18824. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | , , , |
| NonStd Res: | |
| Related: | 3kt1, 3kt4 |
| Gene: | TPA1, YER049W (ATCC 18824) |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
[TPA1_YEAST] Part of a messenger ribonucleoprotein (mRNP) complex at the 3'-UTR of mRNAs. It associates specifically with components of the translation termination complex and is involved in both translation termination and in regulation of normal mRNA decay through translation termination-coupled poly(A) shortening.[1]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Tpa1 (for termination and polyadenylation) from Saccharomyces cerevisiae is a component of a messenger ribonucleoprotein (mRNP) complex at the 3' untranslated region of mRNAs. It comprises an N-terminal Fe(II)- and 2-oxoglutarate (2OG) dependent dioxygenase domain and a C-terminal domain. The N-terminal dioxygenase domain of a homologous Ofd1 protein from Schizosaccharomyces pombe was proposed to serve as an oxygen sensor that regulates the activity of the C-terminal degradation domain. Members of the Tpa1 family are also present in higher eukaryotes including humans. Here we report the crystal structure of S. cerevisiae Tpa1 as a representative member of the Tpa1 family. Structures have been determined as a binary complex with Fe(III) and as a ternary complex with Fe(III) and 2OG. The structures reveal that both domains of Tpa1 have the double-stranded beta-helix fold and are similar to prolyl 4-hydroxylases. However, the binding of Fe(III) and 2OG is observed in the N-terminal domain only. We also show that Tpa1 binds to poly(rA), suggesting its direct interaction with mRNA in the mRNP complex. The structural and functional data reported in this study support a role of the Tpa1 family as a hydroxylase in the mRNP complex and as an oxygen sensor.
Crystal structure of Tpa1 from Saccharomyces cerevisiae, a component of the messenger ribonucleoprotein complex.,Kim HS, Kim HL, Kim KH, Kim do J, Lee SJ, Yoon JY, Yoon HJ, Lee HY, Park SB, Kim SJ, Lee JY, Suh SW Nucleic Acids Res. 2010 Apr;38(6):2099-110. Epub 2009 Dec 29. PMID:20040577[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Keeling KM, Salas-Marco J, Osherovich LZ, Bedwell DM. Tpa1p is part of an mRNP complex that influences translation termination, mRNA deadenylation, and mRNA turnover in Saccharomyces cerevisiae. Mol Cell Biol. 2006 Jul;26(14):5237-48. PMID:16809762 doi:26/14/5237
- ↑ Kim HS, Kim HL, Kim KH, Kim do J, Lee SJ, Yoon JY, Yoon HJ, Lee HY, Park SB, Kim SJ, Lee JY, Suh SW. Crystal structure of Tpa1 from Saccharomyces cerevisiae, a component of the messenger ribonucleoprotein complex. Nucleic Acids Res. 2010 Apr;38(6):2099-110. Epub 2009 Dec 29. PMID:20040577 doi:10.1093/nar/gkp1151
