5hc9: Difference between revisions

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==Thermotoga maritima CCA-adding enzyme complexed with tRNA_CCA==
==Thermotoga maritima CCA-adding enzyme complexed with tRNA_CCA==
<StructureSection load='5hc9' size='340' side='right' caption='[[5hc9]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
<StructureSection load='5hc9' size='340' side='right'caption='[[5hc9]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[5hc9]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5HC9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5HC9 FirstGlance]. <br>
<table><tr><td colspan='2'>[[5hc9]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermotoga_maritima Thermotoga maritima] and [https://en.wikipedia.org/wiki/Thermotoga_maritima_MSB8 Thermotoga maritima MSB8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5HC9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5HC9 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.9&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3h38|3h38]]</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='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/CCA_tRNA_nucleotidyltransferase CCA tRNA nucleotidyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.72 2.7.7.72] </span></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=5hc9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5hc9 OCA], [https://pdbe.org/5hc9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5hc9 RCSB], [https://www.ebi.ac.uk/pdbsum/5hc9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5hc9 ProSAT]</span></td></tr>
<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=5hc9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5hc9 OCA], [http://pdbe.org/5hc9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5hc9 RCSB], [http://www.ebi.ac.uk/pdbsum/5hc9 PDBsum]</span></td></tr>
</table>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q9WZH4_THEMA Q9WZH4_THEMA]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
CCA-adding enzyme adds the 3'-CCA of tRNA, using CTP and ATP as substrates, and terminates RNA synthesis after completion of CCA addition, without using a nucleic acid template. The complex structure of class-II Thermotoga maritima CCA-adding enzyme and mature tRNA with 3'-CCA revealed the mechanisms by which the enzyme terminates RNA synthesis after completion of 3'-CCA addition, and discriminates 3'-mature tRNA from 3'-immature tRNA. After completion of 3'-CCA addition at the catalytic site, the 3'-CCA refolds and relocates to the release site, which is discrete from the catalytic site. The 3'-CCA forms a continuously stacked, stable conformation together with the enzyme. Consequently, the 3'-mature tRNA rotates relative to the surface of the enzyme, and only the 3'-mature tRNA is ready for release. The 3'-regions of immature tRNAs cannot form the stable stacking conformation in the release site; thus, the 3' end is relocated in the catalytic site, and the 3'-CCA is reconstructed.
Mechanism of 3'-Matured tRNA Discrimination from 3'-Immature tRNA by Class-II CCA-Adding Enzyme.,Yamashita S, Tomita K Structure. 2016 Jun 7;24(6):918-25. doi: 10.1016/j.str.2016.03.022. Epub 2016 Apr, 28. PMID:27133023<ref>PMID:27133023</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5hc9" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: CCA tRNA nucleotidyltransferase]]
[[Category: Large Structures]]
[[Category: Tomita, K]]
[[Category: Thermotoga maritima]]
[[Category: Yamashita, S]]
[[Category: Thermotoga maritima MSB8]]
[[Category: Cca-adding enzyme]]
[[Category: Tomita K]]
[[Category: Transferase]]
[[Category: Yamashita S]]
[[Category: Trna]]

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