View source for 7shj


==Crystal structure of Acinetobacter baumannii ZnuA in the metal-free state==
<StructureSection load='7shj' size='340' side='right'caption='[[7shj]], [[Resolution|resolution]] 2.13&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7shj]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Acinetobacter_baumannii Acinetobacter baumannii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7SHJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7SHJ 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]] 2.13&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NA:SODIUM+ION'>NA</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=7shj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7shj OCA], [https://pdbe.org/7shj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7shj RCSB], [https://www.ebi.ac.uk/pdbsum/7shj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7shj ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A0A6B2IEQ3_ACIBA A0A6B2IEQ3_ACIBA] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Acinetobacter baumannii is a Gram-negative nosocomial pathogen associated with significant disease. Crucial to the survival and pathogenesis of A. baumannii is the ability to acquire essential micronutrients such as Zn(II). Recruitment of Zn(II) by A. baumannii is mediated, at least in part, by the periplasmic solute-binding protein ZnuA and the ATP-binding cassette transporter ZnuBC. Here, we combined genomic, biochemical, and structural approaches to characterize A. baumannii AB5075_UW ZnuA. Bioinformatic analyses using a diverse collection of A. baumannii genomes determined that ZnuA is highly conserved, with the binding site comprised by three strictly conserved histidine residues. The structure of metal-free ZnuA was determined at 2.1 A resolution, with molecular dynamics analyses revealing loop alpha2beta2, which harbors the putative Zn(II)-coordinating residue His41, to be highly mobile in the metal-free state. The contribution of the putative binding site histidine residues to Zn(II) interaction was further probed by mutagenesis. Analysis of ZnuA mutant variants was performed by quantitative metal binding assays, differential scanning fluorimetry, and affinity measurements, which showed that all three histidine residues contributed to Zn(II)-recruitment, albeit to different extents. Collectively, these analyses provide insight into the mechanism of Zn(II)-binding by A. baumannii ZnuA and expand our understanding of the functional diversity of Zn(II)-recruiting proteins.

Structural and biochemical characterization of Acinetobacter baumannii ZnuA.,Alquethamy S, Ganio K, Luo Z, Hossain SI, Hayes AJ, Ve T, Davies MR, Deplazes E, Kobe B, McDevitt CA J Inorg Biochem. 2022 Jun;231:111787. doi: 10.1016/j.jinorgbio.2022.111787. Epub , 2022 Mar 8. PMID:35303613<ref>PMID:35303613</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7shj" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Acinetobacter baumannii]]
[[Category: Large Structures]]
[[Category: Kobe B]]
[[Category: Luo Z]]
[[Category: McDevitt CA]]