View source for 7xtf


==Crystal Structure of PL-5 family polysaccharide lyase PanPL-Y226F mutant from Pandoraea apista in apo form at pH5.5==
<StructureSection load='7xtf' size='340' side='right'caption='[[7xtf]], [[Resolution|resolution]] 1.73&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7xtf]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Pandoraea_apista Pandoraea apista]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7XTF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7XTF 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]] 1.73&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</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=7xtf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7xtf OCA], [https://pdbe.org/7xtf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7xtf RCSB], [https://www.ebi.ac.uk/pdbsum/7xtf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7xtf ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A0A5E5PAL9_9BURK A0A5E5PAL9_9BURK] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Dynamics is an essential process to drive an enzyme to perform a function. When a protein sequence encodes for its three-dimensional structure and hence its function, it essentially defines the intrinsic dynamics of the molecule. The static X-ray crystal structure was thought to shed little insight into the molecule's dynamics until the recently available tool "Ensemble refinement" (ER). Here, we report the structure-function-dynamics of PanPL, an alginate-specific, endolytic, allosteric polysaccharide lyase belonging to the PL-5 family from Pandoraea apista. The crystal structures determined in apo and tetra-ManA bound forms reveal that the PanPL maintains a closed state with an N-terminal loop lid (N-loop-lid) arched over the active site. The B-factor analyses and ER congruently reveal how pH influences the functionally relevant atomic fluctuations at the N-loop-lid. The ER unveils enhanced fluctuations at the N-loop-lid upon substrate binding. The normal-mode analysis finds that the functional states are confined. The 1 mus simulation study suggests the existence of a hidden open state. The longer N-loop-lid selects a mechanism to adopt a closed state and undergo fluctuations to facilitate the substrate binding. Here, our work demonstrates the distinct modes of dynamics; both intrinsic and substrate-induced conformational changes are vital for enzyme functioning and allostery.

Distinct Modes of Hidden Structural Dynamics in the Functioning of an Allosteric Polysaccharide Lyase.,Dash P, Acharya R ACS Cent Sci. 2022 Jul 27;8(7):933-947. doi: 10.1021/acscentsci.2c00277. Epub, 2022 Jul 6. PMID:35912344<ref>PMID:35912344</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7xtf" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Pandoraea apista]]
[[Category: Acharya R]]
[[Category: Dash P]]