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4axh

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Revision as of 07:31, 11 August 2016

Structure and mechanism of the first inverting alkylsulfatase specific for secondary alkylsulfatases

Structural highlights

4axh is a 2 chain structure with sequence from Pseudomonas sp. dsm 6611. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	2yhe, 4av7
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Publication Abstract from PubMed

A highly enantioselective and stereoselective secondary alkylsulfatase from Pseudomonas sp. DSM6611 (Pisa1) was heterologously expressed in Escherichia coli BL21, and purified to homogeneity for kinetic and structural studies. Structure determination of Pisa1 by X-ray crystallography showed that the protein belongs to the family of metallo-beta-lactamases with a conserved binuclear Zn(2+) cluster in the active site. In contrast to a closely related alkylsulfatase from Pseudomonas aeruginosa (SdsA1), Pisa1 showed a preference for secondary rather than primary alkyl sulfates, and enantioselectively hydrolyzed the (R)-enantiomer of rac-2-octyl sulfate, yielding (S)-2-octanol with inversion of absolute configuration as a result of C-O bond cleavage. In order to elucidate the mechanism of inverting sulfate ester hydrolysis, for which no counterpart in chemical catalysis exists, we designed variants of Pisa1 guided by three-dimensional structure and docking experiments. In the course of these studies, we identified an invariant histidine (His317) near the sulfate-binding site as the general acid for crucial protonation of the sulfate leaving group. Additionally, amino acid replacements in the alkyl chain-binding pocket generated an enzyme variant that lost its stereoselectivity towards rac-2-octyl sulfate. These findings are discussed in light of the potential use of this enzyme family for applications in biocatalysis. DATABASE: The atomic coordinates and structural factors have been deposited in the Protein Data Bank under the accession codes 2YHE (wild type, crystal form I), 4AV7 (double variant Ser233-->Tyr/Ph250-->Gly) and 4AXH (wild type, crystal form II) STRUCTURED DIGITAL ABSTRACT: Pisa1 and Pisa1 bind by x-ray crystallography (View interaction).

Structure and mechanism of an inverting alkylsulfatase from Pseudomonas sp. DSM6611 specific for secondary alkyl sulfates.,Knaus T, Schober M, Kepplinger B, Faccinelli M, Pitzer J, Faber K, Macheroux P, Wagner U FEBS J. 2012 Dec;279(23):4374-84. doi: 10.1111/febs.12027. Epub 2012 Nov 7. PMID:23061549^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Knaus T, Schober M, Kepplinger B, Faccinelli M, Pitzer J, Faber K, Macheroux P, Wagner U. Structure and mechanism of an inverting alkylsulfatase from Pseudomonas sp. DSM6611 specific for secondary alkyl sulfates. FEBS J. 2012 Dec;279(23):4374-84. doi: 10.1111/febs.12027. Epub 2012 Nov 7. PMID:23061549 doi:http://dx.doi.org/10.1111/febs.12027

1 Structural highlights
2 Publication Abstract from PubMed
3 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4axh"

@@ Line 1: / Line 1: @@
 ==Structure and mechanism of the first inverting alkylsulfatase specific for secondary alkylsulfatases==
 <StructureSection load='4axh' size='340' side='right' caption='[[4axh]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2yhe|2yhe]], [[4av7|4av7]]</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4axh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4axh OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4axh RCSB], [http://www.ebi.ac.uk/pdbsum/4axh PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4axh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4axh OCA], [http://pdbe.org/4axh PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4axh RCSB], [http://www.ebi.ac.uk/pdbsum/4axh PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4axh ProSAT]</span></td></tr>
 </table>
 <div style="background-color:#fffaf0;">
@@ Line 15: / Line 16: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4axh" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>

4axh

From Proteopedia

Revision as of 07:31, 11 August 2016

Structure and mechanism of the first inverting alkylsulfatase specific for secondary alkylsulfatases

Structural highlights

Publication Abstract from PubMed

References

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