6zzk: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
==Crystal structure of the catalytic domain of C. glutamicum AceF (E2p) in ternary complex with CoA and dihydrolipoamide== | ==Crystal structure of the catalytic domain of C. glutamicum AceF (E2p) in ternary complex with CoA and dihydrolipoamide== | ||
<StructureSection load='6zzk' size='340' side='right'caption='[[6zzk]]' scene=''> | <StructureSection load='6zzk' size='340' side='right'caption='[[6zzk]], [[Resolution|resolution]] 2.09Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6ZZK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6ZZK FirstGlance]. <br> | <table><tr><td colspan='2'>[[6zzk]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Corgl Corgl]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6ZZK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6ZZK FirstGlance]. <br> | ||
</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=6zzk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6zzk OCA], [https://pdbe.org/6zzk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6zzk RCSB], [https://www.ebi.ac.uk/pdbsum/6zzk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6zzk ProSAT]</span></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=COA:COENZYME+A'>COA</scene>, <scene name='pdbligand=LPM:6,8-DIMERCAPTO-OCTANOIC+ACID+AMIDE'>LPM</scene></td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">aceF, sucB, Cgl2207, cg2421 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=196627 CORGL])</td></tr> | |||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Dihydrolipoyllysine-residue_acetyltransferase Dihydrolipoyllysine-residue acetyltransferase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.1.12 2.3.1.12] </span></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=6zzk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6zzk OCA], [https://pdbe.org/6zzk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6zzk RCSB], [https://www.ebi.ac.uk/pdbsum/6zzk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6zzk ProSAT]</span></td></tr> | |||
</table> | </table> | ||
== Function == | |||
[[https://www.uniprot.org/uniprot/ODP2_CORGL ODP2_CORGL]] Is essential for both 2-oxoglutarate dehydrogenase (ODH) and pyruvate dehydrogenase (PDH) activities, but AceF has exclusively transacetylase (and no transsuccinylase) activity. The lipoyl residues required for ODH activity are likely provided by AceF.<ref>PMID:20675489</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
alpha-oxoacid dehydrogenase complexes are large, tripartite enzymatic machineries carrying out key reactions in central metabolism. Extremely conserved across the tree of life, they have been, so far, all considered to be structured around a high-molecular weight hollow core, consisting of up to 60 subunits of the acyltransferase component. We provide here evidence that Actinobacteria break the rule by possessing an acetyltranferase component reduced to its minimally active, trimeric unit, characterized by a unique C-terminal helix bearing an actinobacterial specific insertion that precludes larger protein oligomerization. This particular feature, together with the presence of an odhA gene coding for both the decarboxylase and the acyltransferase domains on the same polypetide, is spread over Actinobacteria and reflects the association of PDH and ODH into a single physical complex. Considering the central role of the pyruvate and 2-oxoglutarate nodes in central metabolism, our findings pave the way to both therapeutic and metabolic engineering applications. | |||
Actinobacteria challenge the paradigm: A unique protein architecture for a well-known, central metabolic complex.,Bruch EM, Vilela P, Yang L, Boyko A, Lexa-Sapart N, Raynal B, Alzari PM, Bellinzoni M Proc Natl Acad Sci U S A. 2021 Nov 30;118(48). pii: 2112107118. doi:, 10.1073/pnas.2112107118. PMID:34819376<ref>PMID:34819376</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 6zzk" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Corgl]] | |||
[[Category: Dihydrolipoyllysine-residue acetyltransferase]] | |||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Bellinzoni M]] | [[Category: Bellinzoni, M]] | ||
[[Category: Bruch | [[Category: Bruch, E M]] | ||
[[Category: Acetyltransferase]] | |||
[[Category: Coa]] | |||
[[Category: Corynebacterium]] | |||
[[Category: Lipoamide]] | |||
[[Category: Odh]] | |||
[[Category: Pdh]] | |||
[[Category: Transferase]] | |||
Revision as of 13:02, 8 December 2021
Crystal structure of the catalytic domain of C. glutamicum AceF (E2p) in ternary complex with CoA and dihydrolipoamideCrystal structure of the catalytic domain of C. glutamicum AceF (E2p) in ternary complex with CoA and dihydrolipoamide
Structural highlights
Function[ODP2_CORGL] Is essential for both 2-oxoglutarate dehydrogenase (ODH) and pyruvate dehydrogenase (PDH) activities, but AceF has exclusively transacetylase (and no transsuccinylase) activity. The lipoyl residues required for ODH activity are likely provided by AceF.[1] Publication Abstract from PubMedalpha-oxoacid dehydrogenase complexes are large, tripartite enzymatic machineries carrying out key reactions in central metabolism. Extremely conserved across the tree of life, they have been, so far, all considered to be structured around a high-molecular weight hollow core, consisting of up to 60 subunits of the acyltransferase component. We provide here evidence that Actinobacteria break the rule by possessing an acetyltranferase component reduced to its minimally active, trimeric unit, characterized by a unique C-terminal helix bearing an actinobacterial specific insertion that precludes larger protein oligomerization. This particular feature, together with the presence of an odhA gene coding for both the decarboxylase and the acyltransferase domains on the same polypetide, is spread over Actinobacteria and reflects the association of PDH and ODH into a single physical complex. Considering the central role of the pyruvate and 2-oxoglutarate nodes in central metabolism, our findings pave the way to both therapeutic and metabolic engineering applications. Actinobacteria challenge the paradigm: A unique protein architecture for a well-known, central metabolic complex.,Bruch EM, Vilela P, Yang L, Boyko A, Lexa-Sapart N, Raynal B, Alzari PM, Bellinzoni M Proc Natl Acad Sci U S A. 2021 Nov 30;118(48). pii: 2112107118. doi:, 10.1073/pnas.2112107118. PMID:34819376[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
|
| ||||||||||||||||||||