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==Human LTC4 synthase in complex with product analogs - implications for enzyme catalysis==
==Human LTC4 synthase in complex with product analogs - implications for enzyme catalysis==
<StructureSection load='4jc7' size='340' side='right' caption='[[4jc7]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
<StructureSection load='4jc7' size='340' side='right'caption='[[4jc7]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[4jc7]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4JC7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4JC7 FirstGlance]. <br>
<table><tr><td colspan='2'>[[4jc7]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4JC7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4JC7 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GTX:S-HEXYLGLUTATHIONE'>GTX</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</scene>, <scene name='pdbligand=PAM:PALMITOLEIC+ACID'>PAM</scene>, <scene name='pdbligand=PLM:PALMITIC+ACID'>PLM</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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]] 2.7&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2uui|2uui]], [[2uuh|2uuh]], [[4jcz|4jcz]]</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GTX:S-HEXYLGLUTATHIONE'>GTX</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</scene>, <scene name='pdbligand=PAM:PALMITOLEIC+ACID'>PAM</scene>, <scene name='pdbligand=PLM:PALMITIC+ACID'>PLM</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">LTC4S ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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=4jc7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4jc7 OCA], [https://pdbe.org/4jc7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4jc7 RCSB], [https://www.ebi.ac.uk/pdbsum/4jc7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4jc7 ProSAT]</span></td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Leukotriene-C(4)_synthase Leukotriene-C(4) synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.4.1.20 4.4.1.20] </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=4jc7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4jc7 OCA], [http://pdbe.org/4jc7 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4jc7 RCSB], [http://www.ebi.ac.uk/pdbsum/4jc7 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4jc7 ProSAT]</span></td></tr>
</table>
</table>
== Disease ==
== Disease ==
[[http://www.uniprot.org/uniprot/LTC4S_HUMAN LTC4S_HUMAN]] Defects in LTC4S are the cause of leukotriene C4 synthase deficiency (LTC4 synthase deficiency) [MIM:[http://omim.org/entry/246530 246530]]. LTC4 synthase deficiency is a fatal neurometabolic developmental disorder. It is associated with muscular hypotonia, psychomotor retardation, failure to thrive, and microcephaly.  
[https://www.uniprot.org/uniprot/LTC4S_HUMAN LTC4S_HUMAN] Defects in LTC4S are the cause of leukotriene C4 synthase deficiency (LTC4 synthase deficiency) [MIM:[https://omim.org/entry/246530 246530]. LTC4 synthase deficiency is a fatal neurometabolic developmental disorder. It is associated with muscular hypotonia, psychomotor retardation, failure to thrive, and microcephaly.
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/LTC4S_HUMAN LTC4S_HUMAN]] Catalyzes the conjugation of leukotriene A4 with reduced glutathione to form leukotriene C4.
[https://www.uniprot.org/uniprot/LTC4S_HUMAN LTC4S_HUMAN] Catalyzes the conjugation of leukotriene A4 with reduced glutathione to form leukotriene C4.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Leukotriene (LT) C4 synthase (LTC4S) catalyzes the conjugation of the fatty acid LTA4 with the tripeptide GSH to produce LTC4, the parent compound of the cysteinyl-leukotrienes, important mediators of asthma. Here we mutated Trp116 in human LTC4S, a residue proposed to play a key role in substrate binding, into an Ala or Phe. Biochemical and structural characterization of these mutants along with crystal structures of the wild type and mutated enzymes in complex with three product analogs, viz. S-hexyl-, 4- phenyl-butyl-, and 2-hydroxy-4-phenyl-butyl-glutathione, provide new insights to binding of substrates and product, identifies a new conformation of the GSH moiety at the active site, and suggests a route for product release, aided by Trp116.


Crystal structures of Leukotriene C4 synthase in complex with product analogs, implications for the enzyme mechanism.,Niegowski D, Kleinschmidt T, Olsson U, Ahmad S, Rinaldo-Matthis A, Haeggstrom JZ J Biol Chem. 2013 Dec 23. PMID:24366866<ref>PMID:24366866</ref>
==See Also==
 
*[[Leukotriene C4 synthase|Leukotriene C4 synthase]]
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4jc7" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Human]]
[[Category: Homo sapiens]]
[[Category: Haeggstrom, J Z]]
[[Category: Large Structures]]
[[Category: Niegowski, D]]
[[Category: Haeggstrom JZ]]
[[Category: Rinaldo-Matthis, A]]
[[Category: Niegowski D]]
[[Category: Leukotriene c4 synthase]]
[[Category: Rinaldo-Matthis A]]
[[Category: Lipid biosynthesis]]
[[Category: Lyase]]
[[Category: Product analog]]

Latest revision as of 15:02, 1 March 2024

Human LTC4 synthase in complex with product analogs - implications for enzyme catalysisHuman LTC4 synthase in complex with product analogs - implications for enzyme catalysis

Structural highlights

4jc7 is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.7Å
Ligands:, , , ,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

LTC4S_HUMAN Defects in LTC4S are the cause of leukotriene C4 synthase deficiency (LTC4 synthase deficiency) [MIM:246530. LTC4 synthase deficiency is a fatal neurometabolic developmental disorder. It is associated with muscular hypotonia, psychomotor retardation, failure to thrive, and microcephaly.

Function

LTC4S_HUMAN Catalyzes the conjugation of leukotriene A4 with reduced glutathione to form leukotriene C4.

See Also

4jc7, resolution 2.70Å

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