View source for 2zzn


==The complex structure of aTrm5 and tRNACys==
<StructureSection load='2zzn' size='340' side='right'caption='[[2zzn]], [[Resolution|resolution]] 2.95&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2zzn]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Methanocaldococcus_jannaschii Methanocaldococcus jannaschii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ZZN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2ZZN 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]] 2.95&#8491;</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>, <scene name='pdbligand=SAM:S-ADENOSYLMETHIONINE'>SAM</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=2zzn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2zzn OCA], [https://pdbe.org/2zzn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2zzn RCSB], [https://www.ebi.ac.uk/pdbsum/2zzn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2zzn ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/TRM5B_METJA TRM5B_METJA] Specifically methylates the N1 position of guanosine-37 in various tRNAs.<ref>PMID:15165845</ref> <ref>PMID:16768442</ref> <ref>PMID:20980671</ref> 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/zz/2zzn_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2zzn ConSurf].
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== Publication Abstract from PubMed ==
tRNA precursors undergo a maturation process, involving nucleotide modifications and folding into the L-shaped tertiary structure. The N1-methylguanosine at position 37 (m1G37), 3' adjacent to the anticodon, is essential for translational fidelity and efficiency. In archaea and eukaryotes, Trm5 introduces the m1G37 modification into all tRNAs bearing G37. Here we report the crystal structures of archaeal Trm5 (aTrm5) in complex with tRNA(Leu) or tRNA(Cys). The D2-D3 domains of aTrm5 discover and modify G37, independently of the tRNA sequences. D1 is connected to D2-D3 through a flexible linker and is designed to recognize the shape of the tRNA outer corner, as a hallmark of the completed L shape formation. This interaction by D1 lowers the K(m) value for tRNA, enabling the D2-D3 catalysis. Thus, we propose that aTrm5 provides the tertiary structure checkpoint in tRNA maturation.

Tertiary structure checkpoint at anticodon loop modification in tRNA functional maturation.,Goto-Ito S, Ito T, Kuratani M, Bessho Y, Yokoyama S Nat Struct Mol Biol. 2009 Oct;16(10):1109-15. Epub 2009 Sep 13. PMID:19749755<ref>PMID:19749755</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 2zzn" style="background-color:#fffaf0;"></div>

==See Also==
*[[Transfer RNA (tRNA)|Transfer RNA (tRNA)]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Methanocaldococcus jannaschii]]
[[Category: Goto-Ito S]]
[[Category: Ito T]]
[[Category: Yokoyama S]]