2xol: Difference between revisions
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==High resolution structure of TtrD from Archaeoglobus fulgidus== | ==High resolution structure of TtrD from Archaeoglobus fulgidus== | ||
<StructureSection load='2xol' size='340' side='right' caption='[[2xol]], [[Resolution|resolution]] 1.35Å' scene=''> | <StructureSection load='2xol' size='340' side='right' caption='[[2xol]], [[Resolution|resolution]] 1.35Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2xol]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[2xol]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Arcfl Arcfl]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2XOL OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2XOL FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2y6y|2y6y]], [[2yjm|2yjm]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2y6y|2y6y]], [[2yjm|2yjm]]</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=2xol FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2xol OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2xol RCSB], [http://www.ebi.ac.uk/pdbsum/2xol PDBsum]</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=2xol FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2xol OCA], [http://pdbe.org/2xol PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2xol RCSB], [http://www.ebi.ac.uk/pdbsum/2xol PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2xol ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | |||
[[http://www.uniprot.org/uniprot/TTRD_ARCFU TTRD_ARCFU]] Binds specifically to the Tat signal peptide of the TtrA subunit of the tetrathionate reductase.<ref>PMID:22289056</ref> | |||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 2xol" style="background-color:#fffaf0;"></div> | |||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Arcfl]] | ||
[[Category: Coulthurst, S J]] | [[Category: Coulthurst, S J]] | ||
[[Category: Dawson, A]] | [[Category: Dawson, A]] | ||
Revision as of 05:06, 5 August 2016
High resolution structure of TtrD from Archaeoglobus fulgidusHigh resolution structure of TtrD from Archaeoglobus fulgidus
Structural highlights
Function[TTRD_ARCFU] Binds specifically to the Tat signal peptide of the TtrA subunit of the tetrathionate reductase.[1] Publication Abstract from PubMedThe twin-arginine translocation (Tat) pathway is a protein targeting system found in bacteria, archaea, and chloroplasts. Proteins are directed to the Tat translocase by N-terminal signal peptides containing SRRxFLK "twin-arginine" amino acid motifs. The key feature of the Tat system is its ability to transport fully folded proteins across ionically sealed membranes. For this reason the Tat pathway has evolved for the assembly of extracytoplasmic redox enzymes that must bind cofactors, and so fold, prior to export. It is important that only cofactor-loaded, folded precursors are presented for export, and cellular processes have been unearthed that regulate signal peptide activity. One mechanism, termed "Tat proofreading", involves specific signal peptide binding proteins or chaperones. The archetypal Tat proofreading chaperones belong to the TorD family, which are dedicatedto the assembly of molybdenum-dependent redox enzymes in bacteria. Here, a gene cluster was identified in the archaeon Archaeoglobus fulgidusthat is predicted to encode a putative molybdenum-dependent tetrathionate reductase. The gene cluster also encodes a TorD family chaperone (AF0160 or TtrD) and in this work TtrD is shown to bind specifically to the Tat signal peptide of the TtrA subunit of the tetrathionate reductase. In addition, the 3D crystal structure of TtrD is presented at 1.35 A resolution and a nine-residue binding epitope for TtrD is identified within the TtrA signal peptide close to the twin-arginine targeting motif. This work suggests that archaea may employ a chaperone-dependent Tat proofreading system that is similar to that utilized by bacteria. Conserved Signal Peptide Recognition Systems across the Prokaryotic Domains.,Coulthurst SJ, Dawson A, Hunter WN, Sargent F Biochemistry. 2012 Feb 13. PMID:22289056[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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