4ics: Difference between revisions

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== Structural highlights ==
== Structural highlights ==
<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>
<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" 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>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.97&#8491;</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'>[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>
</table>
</table>
== Function ==
== Function ==
[https://www.uniprot.org/uniprot/A0A0H2UN95_STRPN A0A0H2UN95_STRPN]  
[https://www.uniprot.org/uniprot/A0A0H2UN95_STRPN A0A0H2UN95_STRPN]  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The 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<ref>PMID:23999297</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4ics" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Aminopeptidase 3D structures|Aminopeptidase 3D structures]]
*[[Aminopeptidase 3D structures|Aminopeptidase 3D structures]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>

Latest revision as of 14:53, 1 March 2024

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

4ics is a 2 chain structure with sequence from Streptococcus pneumoniae TIGR4. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.97Å
Ligands:, ,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

A0A0H2UN95_STRPN

See Also

4ics, resolution 1.97Å

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