8azb: Difference between revisions

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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[8azb]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_subtilis_subsp._subtilis_str._168 Bacillus subtilis subsp. subtilis str. 168]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8AZB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8AZB FirstGlance]. <br>
<table><tr><td colspan='2'>[[8azb]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_subtilis_subsp._subtilis_str._168 Bacillus subtilis subsp. subtilis str. 168]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8AZB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8AZB 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=8azb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8azb OCA], [https://pdbe.org/8azb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8azb RCSB], [https://www.ebi.ac.uk/pdbsum/8azb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8azb ProSAT]</span></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]] 1.4&#8491;</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=8azb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8azb OCA], [https://pdbe.org/8azb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8azb RCSB], [https://www.ebi.ac.uk/pdbsum/8azb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8azb ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[https://www.uniprot.org/uniprot/DPPE_BACSU DPPE_BACSU] Probably part of the ABC transporter DppBCDE involved in dipeptide transport.<ref>PMID:1766370</ref>  
[https://www.uniprot.org/uniprot/DPPE_BACSU DPPE_BACSU] Probably part of the ABC transporter DppBCDE involved in dipeptide transport.<ref>PMID:1766370</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Peptide transporters play important nutritional and cell signalling roles in Bacillus subtilis, which are pronounced during stationary phase adaptations and development. Three high-affinity ATP-binding cassette (ABC) family transporters are involved in peptide uptake - the oligopeptide permease (Opp), another peptide permease (App) and a less well-characterized dipeptide permease (Dpp). Here we report crystal structures of the extracellular substrate binding proteins, OppA and DppE, which serve the Opp and Dpp systems, respectively. The structure of OppA was determined in complex with endogenous peptides, modelled as Ser-Asn-Ser-Ser, and with the sporulation-promoting peptide Ser-Arg-Asn-Val-Thr, which bind with K (d) values of 0.4 and 2 microM, respectively, as measured by isothermal titration calorimetry. Differential scanning fluorescence experiments with a wider panel of ligands showed that OppA has highest affinity for tetra- and penta-peptides. The structure of DppE revealed the unexpected presence of a murein tripeptide (MTP) ligand, l-Ala-d-Glu-meso-DAP, in the peptide binding groove. The mode of MTP binding in DppE is different to that observed in the murein peptide binding protein, MppA, from Escherichia coli, suggesting independent evolution of these proteins from an OppA-like precursor. The presence of MTP in DppE points to a role for Dpp in the uptake and recycling of cell wall peptides, a conclusion that is supported by analysis of the genomic context of dpp, which revealed adjacent genes encoding enzymes involved in muropeptide catabolism in a gene organization that is widely conserved in Firmicutes.
Peptide transport in Bacillus subtilis - structure and specificity in the extracellular solute binding proteins OppA and DppE.,Hughes AM, Darby JF, Dodson EJ, Wilson SJ, Turkenburg JP, Thomas GH, Wilkinson AJ Microbiology (Reading). 2022 Dec;168(12). doi: 10.1099/mic.0.001274. PMID:36748525<ref>PMID:36748525</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8azb" style="background-color:#fffaf0;"></div>
== References ==
== References ==
<references/>
<references/>

Latest revision as of 08:15, 7 February 2024

Crystal Structure of the peptide binding protein DppE from Bacillus subtilis in the unliganded state

8azb, resolution 1.40Å

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