4eyt

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==Crystal structure of the C-terminal domain of Tetrahymena telomerase protein p65==
==Crystal structure of the C-terminal domain of Tetrahymena telomerase protein p65==
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<StructureSection load='4eyt' size='340' side='right' caption='[[4eyt]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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<StructureSection load='4eyt' size='340' side='right'caption='[[4eyt]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[4eyt]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Tetth Tetth]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4EYT OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4EYT FirstGlance]. <br>
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<table><tr><td colspan='2'>[[4eyt]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Tetrahymena_thermophila Tetrahymena thermophila]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4EYT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4EYT FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4erd|4erd]]</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">TAP65 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=5911 TETTH])</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4eyt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4eyt OCA], [https://pdbe.org/4eyt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4eyt RCSB], [https://www.ebi.ac.uk/pdbsum/4eyt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4eyt ProSAT]</span></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4eyt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4eyt OCA], [http://pdbe.org/4eyt PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4eyt RCSB], [http://www.ebi.ac.uk/pdbsum/4eyt PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4eyt ProSAT]</span></td></tr>
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</table>
</table>
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<div style="background-color:#fffaf0;">
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== Function ==
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== Publication Abstract from PubMed ==
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[https://www.uniprot.org/uniprot/LARP7_TETTS LARP7_TETTS] RNA-binding protein required for assembly of the holoenzyme telomerase ribonucleoprotein (RNP) complex (PubMed:15131081, PubMed:15696174, PubMed:16507983, PubMed:17322903, PubMed:20713447, PubMed:22315458, PubMed:22705372). Telomerase is an essential ribonucleoprotein enzyme that copies new telomeric repeats onto chromosome ends by repetitively synthesizing the short telomere-repeat sequence 5'-TTGGGG-3' using an RNA template component TER (PubMed:15696174, PubMed:17322903, PubMed:20713447). TAP65/p65 specifically binds telomerase RNA template TER and is required for biogenesis and placement of the TER stem-terminus element: TAP65/p65 first protects the 3'-end of TER from degradation and acts as a chaperone to correctly fold TER for protein binding; it then bends TER stem-loop IV to position it for interaction of stem-loop IV with catalytic TERT RNA-binding domain (PubMed:15696174, PubMed:17322903, PubMed:20713447, PubMed:22315458, PubMed:22705372).<ref>PMID:15131081</ref> <ref>PMID:15696174</ref> <ref>PMID:16507983</ref> <ref>PMID:17322903</ref> <ref>PMID:20713447</ref> <ref>PMID:22315458</ref> <ref>PMID:22705372</ref>
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Telomerase is a ribonucleoprotein complex essential for maintenance of telomere DNA at linear chromosome ends. The catalytic core of Tetrahymena telomerase comprises a ternary complex of telomerase RNA (TER), telomerase reverse transcriptase (TERT), and the essential La family protein p65. NMR and crystal structures of p65 C-terminal domain and its complex with stem IV of TER reveal that RNA recognition is achieved by a combination of single- and double-stranded RNA binding, which induces a 105 degrees bend in TER. The domain is a cryptic, atypical RNA recognition motif with a disordered C-terminal extension that forms an alpha helix in the complex necessary for hierarchical assembly of TERT with p65-TER. This work provides the first structural insight into biogenesis and assembly of TER with a telomerase-specific protein. Additionally, our studies define a structurally homologous domain (xRRM) in genuine La and LARP7 proteins and suggest a general mode of RNA binding for biogenesis of their diverse RNA targets.
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Structural Basis for Telomerase RNA Recognition and RNP Assembly by the Holoenzyme La Family Protein p65.,Singh M, Wang Z, Koo BK, Patel A, Cascio D, Collins K, Feigon J Mol Cell. 2012 Jun 14. PMID:22705372<ref>PMID:22705372</ref>
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==See Also==
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*[[Telomerase-associated protein|Telomerase-associated protein]]
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 4eyt" style="background-color:#fffaf0;"></div>
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== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Tetth]]
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[[Category: Large Structures]]
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[[Category: Cascio, D]]
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[[Category: Tetrahymena thermophila]]
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[[Category: Collins, K]]
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[[Category: Cascio D]]
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[[Category: Feigon, J]]
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[[Category: Collins K]]
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[[Category: Koo, B K]]
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[[Category: Feigon J]]
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[[Category: Patel, A]]
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[[Category: Koo B-K]]
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[[Category: Singh, M]]
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[[Category: Patel A]]
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[[Category: Wang, Z]]
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[[Category: Singh M]]
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[[Category: La protein]]
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[[Category: Wang Z]]
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[[Category: Larp7]]
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[[Category: Rna]]
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[[Category: Rna binding protein]]
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[[Category: Rrm]]
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[[Category: Xrrm]]
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Current revision

Crystal structure of the C-terminal domain of Tetrahymena telomerase protein p65

PDB ID 4eyt

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