3sf5: Difference between revisions
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< | ==Crystal Structure of Helicobacter pylori Urease Accessory Protein UreF/H complex== | ||
<StructureSection load='3sf5' size='340' side='right'caption='[[3sf5]], [[Resolution|resolution]] 2.50Å' scene=''> | |||
== Structural highlights == | |||
or the | <table><tr><td colspan='2'>[[3sf5]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Helicobacter_pylori Helicobacter pylori]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SF5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3SF5 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]] 2.495Å</td></tr> | |||
-- | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=3sf5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3sf5 OCA], [https://pdbe.org/3sf5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3sf5 RCSB], [https://www.ebi.ac.uk/pdbsum/3sf5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3sf5 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/UREF_HELPY UREF_HELPY] Required for maturation of urease via the functional incorporation of the urease nickel metallocenter (By similarity).[HAMAP-Rule:MF_01385] | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Colonization of Helicobacter pylori in the acidic environment of the human stomach depends on the neutralizing activity of urease. Activation of apo-urease involves carboxylation of lysine 219 and insertion of two nickel ions. In H. pylori, this maturation process involves four urease accessory proteins as follows: UreE, UreF, UreG, and UreH. It is postulated that the apo-urease interacts with UreF, UreG, and UreH to form a pre-activation complex that undergoes GTP-dependent activation of urease. The crystal structure of the UreF-UreH complex reveals conformational changes in two distinct regions of UreF upon complex formation. First, the flexible C-terminal residues of UreF become ordered, forming an extra helix alpha10 and a loop structure stabilized by hydrogen bonds involving Arg-250. Second, the first turn of helix alpha2 uncoils to expose a conserved residue, Tyr-48. Substitution of R250A or Y48A in UreF abolishes the formation of the heterotrimeric complex of UreG-UreF-UreH and abolishes urease maturation. Our results suggest that the C-terminal residues and helix alpha2 of UreF are essential for the recruitment of UreG for the formation of the pre-activation complex. The molecular mass of the UreF-UreH complex determined by static light scattering was 116 +/- 2.3 kDa, which is consistent with the quaternary structure of a dimer of heterodimers observed in the crystal structure. Taking advantage of the unique 2-fold symmetry observed in both the crystal structures of H. pylori urease and the UreF-UreH complex, we proposed a topology model of the pre-activation complex for urease maturation. | |||
Assembly of Preactivation Complex for Urease Maturation in Helicobacter pylori: CRYSTAL STRUCTURE OF UreF-UreH PROTEIN COMPLEX.,Fong YH, Wong HC, Chuck CP, Chen YW, Sun H, Wong KB J Biol Chem. 2011 Dec 16;286(50):43241-9. Epub 2011 Oct 19. PMID:22013070<ref>PMID:22013070</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 3sf5" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Urease accessory protein|Urease accessory protein]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
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< | |||
[[Category: Helicobacter pylori]] | [[Category: Helicobacter pylori]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: | [[Category: Chen YW]] | ||
[[Category: | [[Category: Fong YH]] | ||
[[Category: | [[Category: Wong KB]] | ||