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2yx0

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Revision as of 09:28, 17 October 2018

Crystal structure of P. horikoshii TYW1

Structural highlights

2yx0 is a 1 chain structure with sequence from 'pyrococcus shinkaii'. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT, TOPSAN

Function

[TYW1_PYRHO] Component of the wyosine derivatives biosynthesis pathway that catalyzes the condensation of N-methylguanine with 2 carbon atoms from pyruvate to form the tricyclic 4-demethylwyosine (imG-14) on guanosine-37 of tRNA(Phe).[HAMAP-Rule:MF_01921]

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

Wye bases are tricyclic bases that are found in archaeal and eukaryotic tRNAs. The most modified wye base, wybutosine, which appears at position 37 (the 3'-adjacent position to the anticodon), is known to be important for translational reading-frame maintenance. Saccharomyces cerevisiae TYW1 catalyzes the tri-ring-formation step in wye-base biosynthesis, with the substrate tRNA bearing N(1)-methylated G37. Here, the crystal structure of the archaeal TYW1 homologue from Pyrococcus horikoshii is reported at 2.2 A resolution. The amino-acid sequence of P. horikoshii TYW1 suggested that it is a radical-AdoMet enzyme and the tertiary structure of P. horikoshii TYW1 indeed shares the modified TIM-barrel structure found in other radical-AdoMet enzymes. Radical-AdoMet enzymes generally contain one or two iron-sulfur (FeS) clusters. The tertiary structure of P. horikoshii TYW1 revealed two FeS cluster sites, each containing three cysteine residues. One FeS cluster site was expected from the amino-acid sequence and the other involves cysteine residues that are dispersed throughout the sequence. The existence of two FeS clusters was confirmed from the anomalous Fourier electron-density map. By superposing the P. horikoshii TYW1 tertiary structure on those of other radical-AdoMet enzymes, the AdoMet molecule, which is necessary for the reactions of radical-AdoMet enzymes, was modelled in P. horikoshii TYW1. Surface plots of conservation rates and electrostatic potentials revealed the highly conserved and positively charged active-site hollow. On the basis of the surface properties, a docking model of P. horikoshii TYW1, the tRNA, the FeS clusters and the AdoMet molecule was constructed, with the nucleoside at position 37 of tRNA flipped out from the canonical tRNA structure.

Structure of an archaeal TYW1, the enzyme catalyzing the second step of wye-base biosynthesis.,Goto-Ito S, Ishii R, Ito T, Shibata R, Fusatomi E, Sekine SI, Bessho Y, Yokoyama S Acta Crystallogr D Biol Crystallogr. 2007 Oct;63(Pt 10):1059-68. Epub 2007, Sep 19. PMID:17881823^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Goto-Ito S, Ishii R, Ito T, Shibata R, Fusatomi E, Sekine SI, Bessho Y, Yokoyama S. Structure of an archaeal TYW1, the enzyme catalyzing the second step of wye-base biosynthesis. Acta Crystallogr D Biol Crystallogr. 2007 Oct;63(Pt 10):1059-68. Epub 2007, Sep 19. PMID:17881823 doi:10.1107/S0907444907040668

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2yx0"

@@ Line 1: / Line 1: @@
 ==Crystal structure of P. horikoshii TYW1==
 <StructureSection load='2yx0' size='340' side='right' caption='[[2yx0]], [[Resolution|resolution]] 2.21&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[2yx0]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/'pyrococcus_shinkaii' 'pyrococcus shinkaii']. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2YX0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2YX0 FirstGlance]. <br>
-</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=2yx0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2yx0 OCA], [http://pdbe.org/2yx0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2yx0 RCSB], [http://www.ebi.ac.uk/pdbsum/2yx0 PDBsum], [http://www.topsan.org/Proteins/RSGI/2yx0 TOPSAN]</span></td></tr>
+</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=2yx0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2yx0 OCA], [http://pdbe.org/2yx0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2yx0 RCSB], [http://www.ebi.ac.uk/pdbsum/2yx0 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2yx0 ProSAT], [http://www.topsan.org/Proteins/RSGI/2yx0 TOPSAN]</span></td></tr>
 </table>
 == Function ==
@@ Line 11: / Line 12: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/yx/2yx0_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/yx/2yx0_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

2yx0

From Proteopedia

Revision as of 09:28, 17 October 2018

Crystal structure of P. horikoshii TYW1

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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