1jg1

<StructureSection load='1jg1' size='340' side='right' caption='[[1jg1]], [[Resolution|resolution]] 1.20&Aring;' scene=''>

<table><tr><td colspan='2'>[[1jg1]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_43587 Atcc 43587]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1JG1 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1JG1 FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SAH:S-ADENOSYL-L-HOMOCYSTEINE'>SAH</scene></td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Protein-L-isoaspartate(D-aspartate)_O-methyltransferase Protein-L-isoaspartate(D-aspartate) O-methyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.77 2.1.1.77] </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=1jg1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1jg1 OCA], [http://pdbe.org/1jg1 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1jg1 RCSB], [http://www.ebi.ac.uk/pdbsum/1jg1 PDBsum]</span></td></tr>

[[http://www.uniprot.org/uniprot/PIMT_PYRFU PIMT_PYRFU]] Catalyzes the methyl esterification of L-isoaspartyl residues in peptides and proteins that result from spontaneous decomposition of normal L-aspartyl and L-asparaginyl residues. It plays a role in the repair and/or degradation of damaged proteins (By similarity).

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/jg/1jg1_consurf.spt"</scriptWhenChecked>

</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf].

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== Publication Abstract from PubMed ==

Protein L-isoaspartyl (D-aspartyl) methyltransferases (EC 2.1.1.77) are found in almost all organisms. These enzymes catalyze the S-adenosylmethionine (AdoMet)-dependent methylation of isomerized and racemized aspartyl residues in age-damaged proteins as part of an essential protein repair process. Here, we report crystal structures of the repair methyltransferase at resolutions up to 1.2 A from the hyperthermophilic archaeon Pyrococcus furiosus. Refined structures include binary complexes with the active cofactor AdoMet, its reaction product S-adenosylhomocysteine (AdoHcy), and adenosine. The enzyme places the methyl-donating cofactor in a deep, electrostatically negative pocket that is shielded from solvent. Across the multiple crystal structures visualized, the presence or absence of the methyl group on the cofactor correlates with a significant conformational change in the enzyme in a loop bordering the active site, suggesting a role for motion in catalysis or cofactor exchange. We also report the structure of a ternary complex of the enzyme with adenosine and the methyl-accepting polypeptide substrate VYP(L-isoAsp)HA at 2.1 A. The substrate binds in a narrow active site cleft with three of its residues in an extended conformation, suggesting that damaged proteins may be locally denatured during the repair process in cells. Manual and computer-based docking studies on different isomers help explain how the enzyme uses steric effects to make the critical distinction between normal L-aspartyl and age-damaged L-isoaspartyl and D-aspartyl residues.

Crystal structure of a protein repair methyltransferase from Pyrococcus furiosus with its L-isoaspartyl peptide substrate.,Griffith SC, Sawaya MR, Boutz DR, Thapar N, Katz JE, Clarke S, Yeates TO J Mol Biol. 2001 Nov 9;313(5):1103-16. PMID:11700066<ref>PMID:11700066</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 1jg1" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Atcc 43587]]

[[Category: Boutz, D]]

[[Category: Clarke, S]]

[[Category: Griffith, S C]]

[[Category: Katz, J]]

[[Category: Sawaya, M R]]

[[Category: Thapar, N]]

[[Category: Yeates, T O]]

[[Category: Transferase]]