6f5d: Difference between revisions
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==Trypanosoma brucei F1-ATPase== | ==Trypanosoma brucei F1-ATPase== | ||
<StructureSection load='6f5d' size='340' side='right' caption='[[6f5d]], [[Resolution|resolution]] 3.20Å' scene=''> | <StructureSection load='6f5d' size='340' side='right'caption='[[6f5d]], [[Resolution|resolution]] 3.20Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[6f5d]] is a 12 chain structure with sequence from [ | <table><tr><td colspan='2'>[[6f5d]] is a 12 chain structure with sequence from [https://en.wikipedia.org/wiki/Trypanosoma_brucei_brucei Trypanosoma brucei brucei]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6F5D OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6F5D FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.2Å</td></tr> | ||
<tr id=' | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</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'>[ | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6f5d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6f5d OCA], [https://pdbe.org/6f5d PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6f5d RCSB], [https://www.ebi.ac.uk/pdbsum/6f5d PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6f5d ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/Q57TX9_TRYB2 Q57TX9_TRYB2] | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The structures and functions of the components of ATP synthases, especially those subunits involved directly in the catalytic formation of ATP, are widely conserved in metazoans, fungi, eubacteria, and plant chloroplasts. On the basis of a map at 32.5-A resolution determined in situ in the mitochondria of Trypanosoma brucei by electron cryotomography, it has been proposed that the ATP synthase in this species has a noncanonical structure and different catalytic sites in which the catalytically essential arginine finger is provided not by the alpha-subunit adjacent to the catalytic nucleotide-binding site as in all species investigated to date, but rather by a protein, p18, found only in the euglenozoa. A crystal structure at 3.2-A resolution of the catalytic domain of the same enzyme demonstrates that this proposal is incorrect. In many respects, the structure is similar to the structures of F1-ATPases determined previously. The alpha3beta3-spherical portion of the catalytic domain in which the three catalytic sites are found, plus the central stalk, are highly conserved, and the arginine finger is provided conventionally by the alpha-subunits adjacent to each of the three catalytic sites found in the beta-subunits. Thus, the enzyme has a conventional catalytic mechanism. The structure differs from previous described structures by the presence of a p18 subunit, identified only in the euglenozoa, associated with the external surface of each of the three alpha-subunits, thereby elaborating the F1-domain. Subunit p18 is a pentatricopeptide repeat (PPR) protein with three PPRs and appears to have no function in the catalytic mechanism of the enzyme. | |||
ATP synthase from Trypanosoma brucei has an elaborated canonical F1-domain and conventional catalytic sites.,Montgomery MG, Gahura O, Leslie AGW, Zikova A, Walker JE Proc Natl Acad Sci U S A. 2018 Feb 27;115(9):2102-2107. doi:, 10.1073/pnas.1720940115. Epub 2018 Feb 12. PMID:29440423<ref>PMID:29440423</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 6f5d" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[ATPase 3D structures|ATPase 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | |||
[[Category: Trypanosoma brucei brucei]] | [[Category: Trypanosoma brucei brucei]] | ||
[[Category: Gahura | [[Category: Gahura O]] | ||
[[Category: Leslie | [[Category: Leslie AGW]] | ||
[[Category: Montgomery | [[Category: Montgomery MG]] | ||
[[Category: Walker | [[Category: Walker JE]] | ||
[[Category: Zikova | [[Category: Zikova A]] | ||
Latest revision as of 12:54, 23 October 2024
Trypanosoma brucei F1-ATPaseTrypanosoma brucei F1-ATPase
Structural highlights
FunctionPublication Abstract from PubMedThe structures and functions of the components of ATP synthases, especially those subunits involved directly in the catalytic formation of ATP, are widely conserved in metazoans, fungi, eubacteria, and plant chloroplasts. On the basis of a map at 32.5-A resolution determined in situ in the mitochondria of Trypanosoma brucei by electron cryotomography, it has been proposed that the ATP synthase in this species has a noncanonical structure and different catalytic sites in which the catalytically essential arginine finger is provided not by the alpha-subunit adjacent to the catalytic nucleotide-binding site as in all species investigated to date, but rather by a protein, p18, found only in the euglenozoa. A crystal structure at 3.2-A resolution of the catalytic domain of the same enzyme demonstrates that this proposal is incorrect. In many respects, the structure is similar to the structures of F1-ATPases determined previously. The alpha3beta3-spherical portion of the catalytic domain in which the three catalytic sites are found, plus the central stalk, are highly conserved, and the arginine finger is provided conventionally by the alpha-subunits adjacent to each of the three catalytic sites found in the beta-subunits. Thus, the enzyme has a conventional catalytic mechanism. The structure differs from previous described structures by the presence of a p18 subunit, identified only in the euglenozoa, associated with the external surface of each of the three alpha-subunits, thereby elaborating the F1-domain. Subunit p18 is a pentatricopeptide repeat (PPR) protein with three PPRs and appears to have no function in the catalytic mechanism of the enzyme. ATP synthase from Trypanosoma brucei has an elaborated canonical F1-domain and conventional catalytic sites.,Montgomery MG, Gahura O, Leslie AGW, Zikova A, Walker JE Proc Natl Acad Sci U S A. 2018 Feb 27;115(9):2102-2107. doi:, 10.1073/pnas.1720940115. Epub 2018 Feb 12. PMID:29440423[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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