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==Crystal structure of Oryza sativa Os4BGlu18 monolignol beta-glucosidase== | ==Crystal structure of Oryza sativa Os4BGlu18 monolignol beta-glucosidase== | ||
<StructureSection load='7d6a' size='340' side='right'caption='[[7d6a]]' scene=''> | <StructureSection load='7d6a' size='340' side='right'caption='[[7d6a]], [[Resolution|resolution]] 1.70Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7D6A OCA]. For a <b>guided tour on the structure components</b> use [ | <table><tr><td colspan='2'>[[7d6a]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Oryza_sativa_Japonica_Group Oryza sativa Japonica Group]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7D6A OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7D6A FirstGlance]. <br> | ||
</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.7Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MES:2-(N-MORPHOLINO)-ETHANESULFONIC+ACID'>MES</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=7d6a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7d6a OCA], [https://pdbe.org/7d6a PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7d6a RCSB], [https://www.ebi.ac.uk/pdbsum/7d6a PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7d6a ProSAT]</span></td></tr> | |||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/BGL18_ORYSJ BGL18_ORYSJ] Hydrolyzes glycosides and monolignol glucosides (PubMed:25219312). Can hydrolyze para-nitrophenyl beta-D-glucopyranoside (pNPGlc) in vitro (PubMed:23811195, PubMed:25219312). Hydrolyzes para-nitrophenyl beta-D-fucopyranoside, para-nitrophenyl beta-D-galactopyranoside and para-nitrophenyl beta-D-xylopyranoside in vitro (PubMed:25219312). Hydrolyzes the monolignol glucosides coniferin and syringin with high catalytic efficiencies (PubMed:25219312).<ref>PMID:23811195</ref> <ref>PMID:25219312</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Monolignol glucosides are storage forms of monolignols, which are polymerized to lignin to strengthen plant cell walls. The conversion of monolignol glucosides to monolignols is catalyzed by monolignol beta-glucosidases. Rice Os4BGlu18 beta-glucosidase catalyzes hydrolysis of the monolignol glucosides, coniferin, syringin, and p-coumaryl alcohol glucoside more efficiently than other natural substrates. To understand more clearly the basis for substrate specificity of a monolignol beta-glucosidase, the structure of Os4BGlu18 was determined by X-ray crystallography. Crystals of Os4BGlu18 and its complex with delta-gluconolactone diffracted to 1.7 and 2.1 A resolution, respectively. Two protein molecules were found in the asymmetric unit of the P212121 space group of their isomorphous crystals. The Os4BGlu18 structure exhibited the typical (beta/alpha)8 TIM barrel of glycoside hydrolase family 1 (GH1), but the four variable loops and two disulfide bonds appeared significantly different from other known structures of GH1 beta-glucosidases. Molecular docking studies of the Os4BGlu18 structure with monolignol substrate ligands placed the glycone in a similar position to the delta-gluconolactone in the complex structure and revealed the interactions between protein and ligands. Molecular docking, multiple sequence alignment, and homology modeling identified amino acid residues at the aglycone-binding site involved in substrate specificity for monolignol beta-glucosides. Thus, the structural basis of substrate recognition and hydrolysis by monolignol beta-glucosidases was elucidated. | |||
Structural analysis of rice Os4BGlu18 monolignol beta-glucosidase.,Baiya S, Pengthaisong S, Kitjaruwankul S, Ketudat Cairns JR PLoS One. 2021 Jan 20;16(1):e0241325. doi: 10.1371/journal.pone.0241325. , eCollection 2021. PMID:33471829<ref>PMID:33471829</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 7d6a" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Beta-glucosidase 3D structures|Beta-glucosidase 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Oryza sativa Japonica Group]] | |||
[[Category: Baiya S]] | [[Category: Baiya S]] | ||
[[Category: Ketudat Cairns JR]] | [[Category: Ketudat Cairns JR]] | ||
[[Category: Pengthaisong S]] | [[Category: Pengthaisong S]] | ||
Revision as of 19:27, 29 November 2023
Crystal structure of Oryza sativa Os4BGlu18 monolignol beta-glucosidaseCrystal structure of Oryza sativa Os4BGlu18 monolignol beta-glucosidase
Structural highlights
FunctionBGL18_ORYSJ Hydrolyzes glycosides and monolignol glucosides (PubMed:25219312). Can hydrolyze para-nitrophenyl beta-D-glucopyranoside (pNPGlc) in vitro (PubMed:23811195, PubMed:25219312). Hydrolyzes para-nitrophenyl beta-D-fucopyranoside, para-nitrophenyl beta-D-galactopyranoside and para-nitrophenyl beta-D-xylopyranoside in vitro (PubMed:25219312). Hydrolyzes the monolignol glucosides coniferin and syringin with high catalytic efficiencies (PubMed:25219312).[1] [2] Publication Abstract from PubMedMonolignol glucosides are storage forms of monolignols, which are polymerized to lignin to strengthen plant cell walls. The conversion of monolignol glucosides to monolignols is catalyzed by monolignol beta-glucosidases. Rice Os4BGlu18 beta-glucosidase catalyzes hydrolysis of the monolignol glucosides, coniferin, syringin, and p-coumaryl alcohol glucoside more efficiently than other natural substrates. To understand more clearly the basis for substrate specificity of a monolignol beta-glucosidase, the structure of Os4BGlu18 was determined by X-ray crystallography. Crystals of Os4BGlu18 and its complex with delta-gluconolactone diffracted to 1.7 and 2.1 A resolution, respectively. Two protein molecules were found in the asymmetric unit of the P212121 space group of their isomorphous crystals. The Os4BGlu18 structure exhibited the typical (beta/alpha)8 TIM barrel of glycoside hydrolase family 1 (GH1), but the four variable loops and two disulfide bonds appeared significantly different from other known structures of GH1 beta-glucosidases. Molecular docking studies of the Os4BGlu18 structure with monolignol substrate ligands placed the glycone in a similar position to the delta-gluconolactone in the complex structure and revealed the interactions between protein and ligands. Molecular docking, multiple sequence alignment, and homology modeling identified amino acid residues at the aglycone-binding site involved in substrate specificity for monolignol beta-glucosides. Thus, the structural basis of substrate recognition and hydrolysis by monolignol beta-glucosidases was elucidated. Structural analysis of rice Os4BGlu18 monolignol beta-glucosidase.,Baiya S, Pengthaisong S, Kitjaruwankul S, Ketudat Cairns JR PLoS One. 2021 Jan 20;16(1):e0241325. doi: 10.1371/journal.pone.0241325. , eCollection 2021. PMID:33471829[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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