5c9h: Difference between revisions
New page: '''Unreleased structure''' The entry 5c9h is ON HOLD Authors: Jansson, L.I., Akiyama, B.M., Ooms, A., Lu, C., Rubin, S.M., Stone, M.D. Description: Structural Basis of Template Boundar... |
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==Structural Basis of Template Boundary Definition in Tetrahymena Telomerase== | |||
<StructureSection load='5c9h' size='340' side='right'caption='[[5c9h]], [[Resolution|resolution]] 3.00Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[5c9h]] 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=5C9H OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5C9H FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5c9h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5c9h OCA], [https://pdbe.org/5c9h PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5c9h RCSB], [https://www.ebi.ac.uk/pdbsum/5c9h PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5c9h ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/TERT_TETTS TERT_TETTS] Catalytic component of telomerase, 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:10944124, PubMed:15696174, PubMed:17322903, PubMed:20713447, PubMed:16462747). TERT is a reverse transcriptase that adds simple sequence repeats to chromosome ends by copying a template sequence within the RNA component of the enzyme (PubMed:10944124, PubMed:15696174, PubMed:17322903, PubMed:20713447, PubMed:16462747).<ref>PMID:10944124</ref> <ref>PMID:15696174</ref> <ref>PMID:16462747</ref> <ref>PMID:17322903</ref> <ref>PMID:20713447</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Telomerase is required to maintain repetitive G-rich telomeric DNA sequences at chromosome ends. To do so, the telomerase reverse transcriptase (TERT) subunit reiteratively uses a small region of the integral telomerase RNA (TER) as a template. An essential feature of telomerase catalysis is the strict definition of the template boundary to determine the precise TER nucleotides to be reverse transcribed by TERT. We report the 3-A crystal structure of the Tetrahymena TERT RNA-binding domain (tTRBD) bound to the template boundary element (TBE) of TER. tTRBD is wedged into the base of the TBE RNA stem-loop, and each of the flanking RNA strands wraps around opposite sides of the protein domain. The structure illustrates how the tTRBD establishes the template boundary by positioning the TBE at the correct distance from the TERT active site to prohibit copying of nontemplate nucleotides. | |||
Structural basis of template-boundary definition in Tetrahymena telomerase.,Jansson LI, Akiyama BM, Ooms A, Lu C, Rubin SM, Stone MD Nat Struct Mol Biol. 2015 Oct 5. doi: 10.1038/nsmb.3101. PMID:26436828<ref>PMID:26436828</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
[[Category: | <div class="pdbe-citations 5c9h" style="background-color:#fffaf0;"></div> | ||
[[Category: | |||
[[Category: | ==See Also== | ||
[[Category: | *[[Telomerase 3D structures|Telomerase 3D structures]] | ||
[[Category: | == References == | ||
[[Category: | <references/> | ||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Tetrahymena thermophila]] | |||
[[Category: Akiyama BM]] | |||
[[Category: Jansson LI]] | |||
[[Category: Lu C]] | |||
[[Category: Ooms A]] | |||
[[Category: Rubin SM]] | |||
[[Category: Stone MD]] | |||