3h0m

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Revision as of 05:51, 7 December 2018

Structure of trna-dependent amidotransferase gatcab from aquifex aeolicus

Structural highlights

3h0m is a 24 chain structure with sequence from "aquifex_aeolicus"_huber_and_stetter_2001 "aquifex aeolicus" huber and stetter 2001. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Related:	2g5i, 2g5h, 2f2a, 2df4, 2gi3, 3h0l
Gene:	aq_247, gatA, GATCA ("Aquifex aeolicus" Huber and Stetter 2001), aq_461, gatB ("Aquifex aeolicus" Huber and Stetter 2001), gatC, aq_2149 ("Aquifex aeolicus" Huber and Stetter 2001)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[GATA_AQUAE] Allows the formation of correctly charged Gln-tRNA(Gln) through the transamidation of misacylated Glu-tRNA(Gln) in organisms which lack glutaminyl-tRNA synthetase. The reaction takes place in the presence of glutamine and ATP through an activated gamma-phospho-Glu-tRNA(Gln) (By similarity). [GATC_AQUAE] Allows the formation of correctly charged Asn-tRNA(Asn) or Gln-tRNA(Gln) through the transamidation of misacylated Asp-tRNA(Asn) or Glu-tRNA(Gln) in organisms which lack either or both of asparaginyl-tRNA or glutaminyl-tRNA synthetases. The reaction takes place in the presence of glutamine and ATP through an activated phospho-Asp-tRNA(Asn) or phospho-Glu-tRNA(Gln) (By similarity). [GATB_AQUAE] Allows the formation of correctly charged Asn-tRNA(Asn) or Gln-tRNA(Gln) through the transamidation of misacylated Asp-tRNA(Asn) or Glu-tRNA(Gln) in organisms which lack either or both of asparaginyl-tRNA or glutaminyl-tRNA synthetases. The reaction takes place in the presence of glutamine and ATP through an activated phospho-Asp-tRNA(Asn) or phospho-Glu-tRNA(Gln) (By similarity).

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

Many bacteria form Gln-tRNA(Gln) and Asn-tRNA(Asn) by conversion of the misacylated Glu-tRNA(Gln) and Asp-tRNA(Asn) species catalyzed by the GatCAB amidotransferase in the presence of ATP and an amide donor (glutamine or asparagine). Here, we report the crystal structures of GatCAB from the hyperthermophilic bacterium Aquifex aeolicus, complexed with glutamine, asparagine, aspartate, ADP, or ATP. In contrast to the Staphylococcus aureus GatCAB, the A. aeolicus enzyme formed acyl-enzyme intermediates with either glutamine or asparagine, in line with the equally facile use by the amidotransferase of these amino acids as amide donors in the transamidation reaction. A water-filled ammonia channel is open throughout the length of the A. aeolicus GatCAB from the GatA active site to the synthetase catalytic pocket in the B-subunit. A non-catalytic Zn(2+) site in the A. aeolicus GatB stabilizes subunit contacts and the ammonia channel. Judged from sequence conservation in the known GatCAB sequences, the Zn(2+) binding motif was likely present in the primordial GatB/E, but became lost in certain lineages (e.g., S. aureus GatB). Two divalent metal binding sites, one permanent and the other transient, are present in the catalytic pocket of the A. aeolicus GatB. The two sites enable GatCAB to first phosphorylate the misacylated tRNA substrate and then amidate the activated intermediate to form the cognate products, Gln-tRNA(Gln) or Asn-tRNA(Asn).

Insights into tRNA-dependent amidotransferase evolution and catalysis from the structure of the Aquifex aeolicus enzyme.,Wu J, Bu W, Sheppard K, Kitabatake M, Kwon ST, Soll D, Smith JL J Mol Biol. 2009 Aug 28;391(4):703-16. Epub 2009 Jun 9. PMID:19520089^[1]

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

References

↑ Wu J, Bu W, Sheppard K, Kitabatake M, Kwon ST, Soll D, Smith JL. Insights into tRNA-dependent amidotransferase evolution and catalysis from the structure of the Aquifex aeolicus enzyme. J Mol Biol. 2009 Aug 28;391(4):703-16. Epub 2009 Jun 9. PMID:19520089 doi:10.1016/j.jmb.2009.06.014

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/3h0m"

@@ Line 1: / Line 1: @@
 ==Structure of trna-dependent amidotransferase gatcab from aquifex aeolicus==
 <StructureSection load='3h0m' size='340' side='right' caption='[[3h0m]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2g5i|2g5i]], [[2g5h|2g5h]], [[2f2a|2f2a]], [[2df4|2df4]], [[2gi3|2gi3]], [[3h0l|3h0l]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">aq_247, gatA, GATCA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=63363 "Aquifex aeolicus" Huber and Stetter 2001]), aq_461, gatB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=63363 "Aquifex aeolicus" Huber and Stetter 2001]), gatC, aq_2149 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=63363 "Aquifex aeolicus" Huber and Stetter 2001])</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=3h0m FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3h0m OCA], [http://pdbe.org/3h0m PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3h0m RCSB], [http://www.ebi.ac.uk/pdbsum/3h0m 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=3h0m FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3h0m OCA], [http://pdbe.org/3h0m PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3h0m RCSB], [http://www.ebi.ac.uk/pdbsum/3h0m PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3h0m ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 14: / Line 15: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/h0/3h0m_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/h0/3h0m_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

3h0m

From Proteopedia

Revision as of 05:51, 7 December 2018

Structure of trna-dependent amidotransferase gatcab from aquifex aeolicus

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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