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| | ==Crystal structure of the transamidosome== | | ==Crystal structure of the transamidosome== |
| - | <StructureSection load='3kfu' size='340' side='right' caption='[[3kfu]], [[Resolution|resolution]] 3.00Å' scene=''> | + | <StructureSection load='3kfu' size='340' side='right'caption='[[3kfu]], [[Resolution|resolution]] 3.00Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3kfu]] is a 14 chain structure with sequence from [http://en.wikipedia.org/wiki/ ] and [http://en.wikipedia.org/wiki/Thet8 Thet8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3KFU OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3KFU FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3kfu]] is a 14 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_thermophilus_HB8 Thermus thermophilus HB8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3KFU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3KFU 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>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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]] 3Å</td></tr> |
| - | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=5MU:5-METHYLURIDINE+5-MONOPHOSPHATE'>5MU</scene>, <scene name='pdbligand=H2U:5,6-DIHYDROURIDINE-5-MONOPHOSPHATE'>H2U</scene>, <scene name='pdbligand=PSU:PSEUDOURIDINE-5-MONOPHOSPHATE'>PSU</scene>, <scene name='pdbligand=UNK:UNKNOWN'>UNK</scene></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=5MU:5-METHYLURIDINE+5-MONOPHOSPHATE'>5MU</scene>, <scene name='pdbligand=H2U:5,6-DIHYDROURIDINE-5-MONOPHOSPHATE'>H2U</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PSU:PSEUDOURIDINE-5-MONOPHOSPHATE'>PSU</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">TTHA1452 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=300852 THET8]), gatA, TTHA0573 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=300852 THET8]), gatB, TTHA0366 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=300852 THET8]), gatC, TTHA0876 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=300852 THET8])</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=3kfu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3kfu OCA], [https://pdbe.org/3kfu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3kfu RCSB], [https://www.ebi.ac.uk/pdbsum/3kfu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3kfu 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=3kfu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3kfu OCA], [http://pdbe.org/3kfu PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3kfu RCSB], [http://www.ebi.ac.uk/pdbsum/3kfu PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3kfu ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/GATC_THET8 GATC_THET8]] 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). [[http://www.uniprot.org/uniprot/GATB_THET8 GATB_THET8]] 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). [[http://www.uniprot.org/uniprot/GATA_THET8 GATA_THET8]] 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). Also acts on Asp-tRNA(Asn). | + | [https://www.uniprot.org/uniprot/GATB_THET8 GATB_THET8] 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). |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | ==See Also== | | ==See Also== |
| - | *[[Aminoacyl tRNA Synthetase|Aminoacyl tRNA Synthetase]] | + | *[[Aminoacyl tRNA synthetase 3D structures|Aminoacyl tRNA synthetase 3D structures]] |
| | + | *[[Glutamyl-tRNA(Gln) amidotransferase|Glutamyl-tRNA(Gln) amidotransferase]] |
| | *[[Transfer RNA (tRNA)|Transfer RNA (tRNA)]] | | *[[Transfer RNA (tRNA)|Transfer RNA (tRNA)]] |
| | == References == | | == References == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Thet8]] | + | [[Category: Large Structures]] |
| - | [[Category: Bailly, M]] | + | [[Category: Thermus thermophilus HB8]] |
| - | [[Category: Becker, H D]] | + | [[Category: Bailly M]] |
| - | [[Category: Blaise, M]] | + | [[Category: Becker HD]] |
| - | [[Category: Frechin, M]] | + | [[Category: Blaise M]] |
| - | [[Category: Kern, D]] | + | [[Category: Frechin M]] |
| - | [[Category: Thirup, S]] | + | [[Category: Kern D]] |
| - | [[Category: Aminoacyl-trna synthetase]]
| + | [[Category: Thirup S]] |
| - | [[Category: Aspr]]
| + | |
| - | [[Category: Atp-binding]]
| + | |
| - | [[Category: Gatcab]]
| + | |
| - | [[Category: Ligase]]
| + | |
| - | [[Category: Ligase-rna complex]]
| + | |
| - | [[Category: Nucleotide-binding]]
| + | |
| - | [[Category: Protein biosynthesis]]
| + | |
| Structural highlights
3kfu is a 14 chain structure with sequence from Thermus thermophilus HB8. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Method: | X-ray diffraction, Resolution 3Å |
| Ligands: | , , , , |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
GATB_THET8 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).
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
Four out of the 22 aminoacyl-tRNAs (aa-tRNAs) are systematically or alternatively synthesized by an indirect, two-step route requiring an initial mischarging of the tRNA followed by tRNA-dependent conversion of the non-cognate amino acid. During tRNA-dependent asparagine formation, tRNA(Asn) promotes assembly of a ribonucleoprotein particle called transamidosome that allows channelling of the aa-tRNA from non-discriminating aspartyl-tRNA synthetase active site to the GatCAB amidotransferase site. The crystal structure of the Thermus thermophilus transamidosome determined at 3 A resolution reveals a particle formed by two GatCABs, two dimeric ND-AspRSs and four tRNAs(Asn) molecules. In the complex, only two tRNAs are bound in a functional state, whereas the two other ones act as an RNA scaffold enabling release of the asparaginyl-tRNA(Asn) without dissociation of the complex. We propose that the crystal structure represents a transient state of the transamidation reaction. The transamidosome constitutes a transfer-ribonucleoprotein particle in which tRNAs serve the function of both substrate and structural foundation for a large molecular machine.
Crystal structure of a transfer-ribonucleoprotein particle that promotes asparagine formation.,Blaise M, Bailly M, Frechin M, Behrens MA, Fischer F, Oliveira CL, Becker HD, Pedersen JS, Thirup S, Kern D EMBO J. 2010 Sep 15;29(18):3118-29. Epub 2010 Aug 17. PMID:20717102[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Blaise M, Bailly M, Frechin M, Behrens MA, Fischer F, Oliveira CL, Becker HD, Pedersen JS, Thirup S, Kern D. Crystal structure of a transfer-ribonucleoprotein particle that promotes asparagine formation. EMBO J. 2010 Sep 15;29(18):3118-29. Epub 2010 Aug 17. PMID:20717102 doi:10.1038/emboj.2010.192
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