4ics: Difference between revisions
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==Crystal structure of PepS from Streptococcus pneumoniae in complex with a substrate== | ==Crystal structure of PepS from Streptococcus pneumoniae in complex with a substrate== | ||
<StructureSection load='4ics' size='340' side='right' caption='[[4ics]], [[Resolution|resolution]] 1.97Å' scene=''> | <StructureSection load='4ics' size='340' side='right'caption='[[4ics]], [[Resolution|resolution]] 1.97Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4ics]] is a 2 chain structure with sequence from [ | <table><tr><td colspan='2'>[[4ics]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus_pneumoniae_TIGR4 Streptococcus pneumoniae TIGR4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ICS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4ICS FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GLY:GLYCINE'>GLY</scene>, <scene name='pdbligand=TRP:TRYPTOPHAN'>TRP</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GLY:GLYCINE'>GLY</scene>, <scene name='pdbligand=TRP:TRYPTOPHAN'>TRP</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=4ics FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ics OCA], [https://pdbe.org/4ics PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4ics RCSB], [https://www.ebi.ac.uk/pdbsum/4ics PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4ics ProSAT]</span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/A0A0H2UN95_STRPN A0A0H2UN95_STRPN] | |||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
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==See Also== | ==See Also== | ||
*[[Aminopeptidase|Aminopeptidase]] | *[[Aminopeptidase 3D structures|Aminopeptidase 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: | [[Category: Streptococcus pneumoniae TIGR4]] | ||
[[Category: | [[Category: Kim KK]] | ||
[[Category: | [[Category: Lee S]] | ||
[[Category: | [[Category: Ta MH]] | ||
Revision as of 12:01, 9 November 2022
Crystal structure of PepS from Streptococcus pneumoniae in complex with a substrateCrystal structure of PepS from Streptococcus pneumoniae in complex with a substrate
Structural highlights
FunctionPublication Abstract from PubMedThe specificity of proteases for the residues in and length of substrates is key to understanding their regulatory mechanism, but little is known about length selectivity. Crystal structure analyses of the bacterial aminopeptidase PepS, combined with functional and single-molecule FRET assays, have elucidated a molecular basis for length selectivity. PepS exists in open and closed conformations. Substrates can access the binding hole in the open conformation, but catalytic competency is only achieved in the closed conformation by formation of the S1 binding pocket and proximal movement of Glu343, a general base, to the cleavage site. Hence, peptides longer than the depth of the binding hole block the transition from the open to the closed conformation, and thus length selection is a prerequisite for catalytic activation. A triple-sieve interlock mechanism is proposed featuring the coupling of length selectivity with residue specificity and active-site positioning. Structure-based elucidation of the regulatory mechanism for aminopeptidase activity.,Ta HM, Bae S, Han S, Song J, Ahn TK, Hohng S, Lee S, Kim KK Acta Crystallogr D Biol Crystallogr. 2013 Sep;69(Pt 9):1738-47. doi:, 10.1107/S0907444913012651. Epub 2013 Aug 15. PMID:23999297[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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