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| | <StructureSection load='4rl1' size='340' side='right'caption='[[4rl1]], [[Resolution|resolution]] 2.00Å' scene=''> | | <StructureSection load='4rl1' size='340' side='right'caption='[[4rl1]], [[Resolution|resolution]] 2.00Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4rl1]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Straw Straw]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4RL1 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4RL1 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4rl1]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptomyces_avermitilis_MA-4680_=_NBRC_14893 Streptomyces avermitilis MA-4680 = NBRC 14893]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4RL1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4RL1 FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">aveA1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=227882 STRAW])</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]] 2Å</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/[Acyl-carrier-protein]_S-malonyltransferase [Acyl-carrier-protein] S-malonyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.1.39 2.3.1.39] </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=4rl1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4rl1 OCA], [https://pdbe.org/4rl1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4rl1 RCSB], [https://www.ebi.ac.uk/pdbsum/4rl1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4rl1 ProSAT]</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=4rl1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4rl1 OCA], [http://pdbe.org/4rl1 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4rl1 RCSB], [http://www.ebi.ac.uk/pdbsum/4rl1 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4rl1 ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/Q79ZN1_STRAW Q79ZN1_STRAW] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Straw]] | + | [[Category: Streptomyces avermitilis MA-4680 = NBRC 14893]] |
| - | [[Category: Wang, F]] | + | [[Category: Wang F]] |
| - | [[Category: Wang, Y]] | + | [[Category: Wang Y]] |
| - | [[Category: Zheng, J]] | + | [[Category: Zheng J]] |
| - | [[Category: Acyltransferase]]
| + | |
| - | [[Category: Ferredoxin-like fold]]
| + | |
| - | [[Category: Hydrolase]]
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| - | [[Category: Transferase]]
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| Structural highlights
Function
Q79ZN1_STRAW
Publication Abstract from PubMed
The loading acyltransferase (AT) domains of modular polyketide synthases (PKSs) control the choice of starter units incorporated into polyketides and are therefore attractive targets for the engineering of modular PKSs. Here, we report the structural and biochemical characterizations of the loading AT from avermectin modular PKS, which accepts more than 40 carboxylic acids as alternative starter units for the biosynthesis of a series of congeners. This first structural analysis of loading ATs from modular PKSs revealed the molecular basis for the relaxed substrate specificity. Residues important for substrate binding and discrimination were predicted by modeling a substrate into the active site. A mutant with altered specificity toward a panel of synthetic substrate mimics was generated by site-directed mutagenesis of the active site residues. The hydrolysis of the N-acetylcysteamine thioesters of racemic 2-methylbutyric acid confirmed the stereospecificity of the avermectin loading AT for an S configuration at the C-2 position of the substrate. Together, these results set the stage for region-specific modification of polyketides through active site engineering of loading AT domains of modular PKSs.
Structural and Functional Analysis of the Loading Acyltransferase from Avermectin Modular Polyketide Synthase.,Wang F, Wang Y, Ji J, Zhou Z, Yu J, Zhu H, Su Z, Zhang L, Zheng J ACS Chem Biol. 2015 Jan 22. PMID:25581064[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Wang F, Wang Y, Ji J, Zhou Z, Yu J, Zhu H, Su Z, Zhang L, Zheng J. Structural and Functional Analysis of the Loading Acyltransferase from Avermectin Modular Polyketide Synthase. ACS Chem Biol. 2015 Jan 22. PMID:25581064 doi:http://dx.doi.org/10.1021/cb500873k
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