View source for 6bsn


==Structure of proline utilization A (PutA) with proline bound in remote sites==
<StructureSection load='6bsn' size='340' side='right'caption='[[6bsn]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6bsn]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Bradyrhizobium_diazoefficiens_USDA_110 Bradyrhizobium diazoefficiens USDA 110]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6BSN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6BSN 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]] 2.15&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FDA:DIHYDROFLAVINE-ADENINE+DINUCLEOTIDE'>FDA</scene>, <scene name='pdbligand=PRO:PROLINE'>PRO</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=6bsn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6bsn OCA], [https://pdbe.org/6bsn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6bsn RCSB], [https://www.ebi.ac.uk/pdbsum/6bsn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6bsn ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q89E26_BRADU Q89E26_BRADU] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Proline utilization A (PutA) is a bifunctional flavoenzyme that catalyzes the two-step oxidation of l-proline to l-glutamate using spatially separated proline dehydrogenase (PRODH) and l-glutamate-gamma-semialdehyde dehydrogenase (GSALDH) active sites. Substrate inhibition of the coupled PRODH-GSALDH reaction by proline is a common kinetic feature of PutAs, yet the structural basis for this phenomenon remains unknown. To understand the mechanism of substrate inhibition, we determined the 2.15 A resolution crystal structure of Bradyrhizobium japonicum PutA complexed with proline. Proline was discovered in five locations remote from the PRODH active site. Most notably, strong electron density indicated that proline bound tightly to the GSAL binding site of the GSALDH active site. The pose and interactions of proline bound in this site are remarkably similar to those of the natural aldehyde substrate, GSAL, implying that proline inhibits the GSALDH reaction of PutA. Kinetic measurements show that proline is a competitive inhibitor of the PutA GSALDH reaction. Together, the structural and kinetic data show that substrate inhibition of the PutA coupled reaction is due to proline binding in the GSAL site.

Structural Basis for the Substrate Inhibition of Proline Utilization A by Proline.,Korasick DA, Pemberton TA, Arentson BW, Becker DF, Tanner JJ Molecules. 2017 Dec 23;23(1). pii: molecules23010032. doi:, 10.3390/molecules23010032. PMID:29295473<ref>PMID:29295473</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6bsn" style="background-color:#fffaf0;"></div>

==See Also==
*[[Proline utilization A|Proline utilization A]]
== References ==
<references/>
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</StructureSection>
[[Category: Bradyrhizobium diazoefficiens USDA 110]]
[[Category: Large Structures]]
[[Category: Korasick DA]]
[[Category: Tanner JJ]]