View source for 6qin


==CRYSTAL STRUCTURE OF THE PMGL2 ESTERASE FROM PERMAFROST METAGENOMIC LIBRARY==
<StructureSection load='6qin' size='340' side='right'caption='[[6qin]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6qin]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Permafrost_metagenome Permafrost metagenome]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6QIN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6QIN FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.6&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></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=6qin FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6qin OCA], [https://pdbe.org/6qin PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6qin RCSB], [https://www.ebi.ac.uk/pdbsum/6qin PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6qin ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A0A142J6I6_9BACT A0A142J6I6_9BACT] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Lipases comprise a large class of hydrolytic enzymes which catalyze the cleavage of the ester bonds in triacylglycerols and find numerous biotechnological applications. Previously, we have cloned the gene coding for a novel esterase PMGL2 from a Siberian permafrost metagenomic DNA library. We have determined the 3D structure of PMGL2 which belongs to the hormone-sensitive lipase (HSL) family and contains a new variant of the active site motif, GCSAG. Similar to many other HSLs, PMGL2 forms dimers in solution and in the crystal. Our results demonstrated that PMGL2 and structurally characterized members of the GTSAG motif subfamily possess a common dimerization interface that significantly differs from that of members of the GDSAG subfamily of known structure. Moreover, PMGL2 had a unique organization of the active site cavity with significantly different topology compared to the other lipolytic enzymes from the HSL family with known structure including the distinct orientation of the active site entrances within the dimer and about four times larger size of the active site cavity. To study the role of the cysteine residue in GCSAG motif of PMGL2, the catalytic properties and structure of its double C173T/C202S mutant were examined and found to be very similar to the wild type protein. The presence of the bound PEG molecule in the active site of the mutant form allowed for precise mapping of the amino acid residues forming the substrate cavity.

Crystal structure of PMGL2 esterase from the hormone-sensitive lipase family with GCSAG motif around the catalytic serine.,Boyko KM, Kryukova MV, Petrovskaya LE, Nikolaeva AY, Korzhenevsky DA, Novototskaya-Vlasova KA, Rivkina EM, Dolgikh DA, Kirpichnikov MP, Popov VO PLoS One. 2020 Jan 28;15(1):e0226838. doi: 10.1371/journal.pone.0226838., eCollection 2020. PMID:31990908<ref>PMID:31990908</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6qin" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Permafrost metagenome]]
[[Category: Boyko KM]]
[[Category: Dolgikh DA]]
[[Category: Kirpichnikov MP]]
[[Category: Korzhenevskiy DA]]
[[Category: Kryukova MV]]
[[Category: Nikolaeva AY]]
[[Category: Novototskaya-Vlasova KA]]
[[Category: Petrovskaya LE]]
[[Category: Popov VO]]
[[Category: Rivkina EM]]