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6sxu

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Revision as of 10:28, 18 March 2020

GH51 a-l-arabinofuranosidase soaked with cyclic sulfate inhibitor

Structural highlights

6sxu is a 2 chain structure with sequence from Atcc 12980. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , ,
Gene:	abfA (ATCC 12980)
Activity:	Non-reducing end alpha-L-arabinofuranosidase, with EC number 3.2.1.55
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[IABF_GEOSE] Involved in the degradation of arabinan and is a key enzyme in the complete degradation of the plant cell wall. Catalyzes the cleavage of terminal alpha-(1->5)-arabinofuranosyl bonds in different hemicellulosic homopolysaccharides (branched and debranched arabinans). It acts preferentially on aryl-alpha-L-arabinofuranosides, and is much less effective on aryl-beta-D-xylopyranosides.^[1] ^[2] ^[3] ^[4]

Publication Abstract from PubMed

Identifying and characterizing the enzymes responsible for an observed activity within a complex eukaryotic catabolic system remains one of the most significant challenges in the study of biomass-degrading systems. The debranching of both complex hemicellulosic and pectinaceous polysaccharides requires the production of alpha-L-arabinofuranosidases among a wide variety of co-expressed carbohydrate-active enzymes. To selectively detect and identify alpha-L-arabinofuranosidases produced by fungi grown on complex biomass, potential covalent inhibitors and probes which mimic alpha-L-arabinofuranosides were sought. The conformational free energy landscapes of free alpha-L-arabinofuranose and several rationally designed covalent alpha-L-arabinofuranosidase inhibitors were analyzed. A synthetic route to these inhibitors was subsequently developed based on a key Wittig-Still rearrangement. Through a combination of kinetic measurements, intact mass spectrometry, and structural experiments, the designed inhibitors were shown to efficiently label the catalytic nucleophiles of retaining GH51 and GH54 alpha-L-arabinofuranosidases. Activity-based probes elaborated from an inhibitor with an aziridine warhead were applied to the identification and characterization of alpha-L-arabinofuranosidases within the secretome of A. niger grown on arabinan. This method was extended to the detection and identification of alpha-L-arabinofuranosidases produced by eight biomass-degrading basidiomycete fungi grown on complex biomass. The broad applicability of the cyclophellitol-derived activity-based probes and inhibitors presented here make them a valuable new tool in the characterization of complex eukaryotic carbohydrate-degrading systems and in the high-throughput discovery of alpha-L-arabinofuranosidases.

Rational Design of Mechanism-Based Inhibitors and Activity-Based Probes for the Identification of Retaining alpha-L-Arabinofuranosidases.,McGregor N, Artola M, Nin-Hill A, Linzel D, Haon M, Reijngoud J, Ram AFJ, Rosso MN, van der Marel GA, Codee JDC, van Wezel GP, Berrin JG, Rovira C, Overkleeft HS, Davies GJ J Am Chem Soc. 2020 Feb 13. doi: 10.1021/jacs.9b11351. PMID:32053363^[5]

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

References

↑ Shallom D, Belakhov V, Solomon D, Gilead-Gropper S, Baasov T, Shoham G, Shoham Y. The identification of the acid-base catalyst of alpha-arabinofuranosidase from Geobacillus stearothermophilus T-6, a family 51 glycoside hydrolase. FEBS Lett. 2002 Mar 13;514(2-3):163-7. PMID:11943144
↑ Shallom D, Belakhov V, Solomon D, Shoham G, Baasov T, Shoham Y. Detailed kinetic analysis and identification of the nucleophile in alpha-L-arabinofuranosidase from Geobacillus stearothermophilus T-6, a family 51 glycoside hydrolase. J Biol Chem. 2002 Nov 15;277(46):43667-73. Epub 2002 Sep 6. PMID:12221104 doi:http://dx.doi.org/10.1074/jbc.M208285200
↑ Hovel K, Shallom D, Niefind K, Belakhov V, Shoham G, Baasov T, Shoham Y, Schomburg D. Crystal structure and snapshots along the reaction pathway of a family 51 alpha-L-arabinofuranosidase. EMBO J. 2003 Oct 1;22(19):4922-32. PMID:14517232 doi:10.1093/emboj/cdg494
↑ Gilead S, Shoham Y. Purification and characterization of alpha-L-arabinofuranosidase from Bacillus stearothermophilus T-6. Appl Environ Microbiol. 1995 Jan;61(1):170-4. PMID:7887599
↑ McGregor N, Artola M, Nin-Hill A, Linzel D, Haon M, Reijngoud J, Ram AFJ, Rosso MN, van der Marel GA, Codee JDC, van Wezel GP, Berrin JG, Rovira C, Overkleeft HS, Davies GJ. Rational Design of Mechanism-Based Inhibitors and Activity-Based Probes for the Identification of Retaining alpha-L-Arabinofuranosidases. J Am Chem Soc. 2020 Feb 13. doi: 10.1021/jacs.9b11351. PMID:32053363 doi:http://dx.doi.org/10.1021/jacs.9b11351

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6sxu"

@@ Line 3: / Line 3: @@
 <StructureSection load='6sxu' size='340' side='right'caption='[[6sxu]], [[Resolution|resolution]] 1.40&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6sxu]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6SXU OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6SXU FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6sxu]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_12980 Atcc 12980]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6SXU OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6SXU FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=IPA:ISOPROPYL+ALCOHOL'>IPA</scene>, <scene name='pdbligand=LX5:[(1~{S},2~{S},3~{S},4~{S})-2-(hydroxymethyl)-3,4-bis(oxidanyl)cyclopentyl]+hydrogen+sulfate'>LX5</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene></td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">abfA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1422 ATCC 12980])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Non-reducing_end_alpha-L-arabinofuranosidase Non-reducing end alpha-L-arabinofuranosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.55 3.2.1.55] </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=6sxu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6sxu OCA], [http://pdbe.org/6sxu PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6sxu RCSB], [http://www.ebi.ac.uk/pdbsum/6sxu PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6sxu ProSAT]</span></td></tr>
@@ Line 23: / Line 24: @@
 __TOC__
 </StructureSection>
+[[Category: Atcc 12980]]
 [[Category: Large Structures]]
 [[Category: Non-reducing end alpha-L-arabinofuranosidase]]

6sxu

From Proteopedia

Revision as of 10:28, 18 March 2020

GH51 a-l-arabinofuranosidase soaked with cyclic sulfate inhibitor

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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