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==Crystal structure of the two-subunit tRNA m1A58 methyltransferase TRM6-TRM61 in complex with SAM== | ==Crystal structure of the two-subunit tRNA m1A58 methyltransferase TRM6-TRM61 in complex with SAM== | ||
<StructureSection load='5erg' size='340' side='right' caption='[[5erg]], [[Resolution|resolution]] 2.20Å' scene=''> | <StructureSection load='5erg' size='340' side='right'caption='[[5erg]], [[Resolution|resolution]] 2.20Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[5erg]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5ERG OCA]. For a <b>guided tour on the structure components</b> use [http:// | <table><tr><td colspan='2'>[[5erg]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Baker's_yeast Baker's yeast]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5ERG OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5ERG FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SAM:S-ADENOSYLMETHIONINE'>SAM</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SAM:S-ADENOSYLMETHIONINE'>SAM</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5eqj|5eqj]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5eqj|5eqj]]</td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GCD10, TIF33, TRM6, YNL062C, N2422 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Baker's yeast]), GCD14, TRM61, YJL125C, J0710 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Baker's yeast])</td></tr> | |||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/tRNA_(adenine(58)-N(1))-methyltransferase tRNA (adenine(58)-N(1))-methyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.220 2.1.1.220] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/tRNA_(adenine(58)-N(1))-methyltransferase tRNA (adenine(58)-N(1))-methyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.220 2.1.1.220] </span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http:// | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5erg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5erg OCA], [http://pdbe.org/5erg PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5erg RCSB], [http://www.ebi.ac.uk/pdbsum/5erg PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5erg ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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</div> | </div> | ||
<div class="pdbe-citations 5erg" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 5erg" style="background-color:#fffaf0;"></div> | ||
==See Also== | |||
*[[TRNA methyltransferase 3D structures|TRNA methyltransferase 3D structures]] | |||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Baker's yeast]] | |||
[[Category: Large Structures]] | |||
[[Category: Fan, X]] | [[Category: Fan, X]] | ||
[[Category: Jiang, X]] | [[Category: Jiang, X]] | ||
Revision as of 10:10, 22 April 2020
Crystal structure of the two-subunit tRNA m1A58 methyltransferase TRM6-TRM61 in complex with SAMCrystal structure of the two-subunit tRNA m1A58 methyltransferase TRM6-TRM61 in complex with SAM
Structural highlights
Function[TRM6_YEAST] Substrate-binding subunit of tRNA (adenine-N(1)-)-methyltransferase, which catalyzes the formation of N(1)-methyladenine at position 58 (m1A58) in initiator methionyl-tRNA. Binds RNA. Also required for repression of GCN4 mRNA translation by the upstream open reading frames (uORFs) under conditions of amino acid sufficiency.[1] [2] [3] [TRM61_YEAST] Catalytic subunit of tRNA (adenine-N(1)-)-methyltransferase, which catalyzes the formation of N(1)-methyladenine at position 58 (m1A58) in initiator methionyl-tRNA. GCD14 is also required for repression of GCN4 mRNA translation by the upstream open reading frames (uORFs) under conditions of amino acid sufficiency.[4] [5] [6] Publication Abstract from PubMedThe N(1) methylation of adenine at position 58 (m(1)A58) of tRNA is an important post-transcriptional modification, which is vital for maintaining the stability of the initiator methionine tRNAi(Met). In eukaryotes, this modification is performed by the TRM6-TRM61 holoenzyme. To understand the molecular mechanism that underlies the cooperation of TRM6 and TRM61 in the methyl transfer reaction, we determined the crystal structure of TRM6-TRM61 holoenzyme from Saccharomyces cerevisiae in the presence and absence of its methyl donor S-Adenosyl-L-methionine (SAM). In the structures, two TRM6-TRM61 heterodimers assemble as a heterotetramer. Both TRM6 and TRM61 subunits comprise an N-terminal beta-barrel domain linked to a C-terminal Rossmann-fold domain. TRM61 functions as the catalytic subunit, containing a methyl donor (SAM) binding pocket. TRM6 diverges from TRM61, lacking the conserved motifs used for binding SAM. However, TRM6 cooperates with TRM61 forming an L-shaped tRNA binding regions. Collectively, our results provide a structural basis for better understanding the m(1)A58 modification of tRNA occurred in Saccharomyces cerevisiae. Crystal structure of the two-subunit tRNA m(1)A58 methyltransferase TRM6-TRM61 from Saccharomyces cerevisiae.,Wang M, Zhu Y, Wang C, Fan X, Jiang X, Ebrahimi M, Qiao Z, Niu L, Teng M, Li X Sci Rep. 2016 Sep 1;6:32562. doi: 10.1038/srep32562. PMID:27582183[7] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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