View source for 3ogs


==Complex structure of beta-galactosidase from Trichoderma reesei with IPTG==
<StructureSection load='3ogs' size='340' side='right'caption='[[3ogs]], [[Resolution|resolution]] 1.75&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3ogs]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Trichoderma_reesei Trichoderma reesei]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3OGS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3OGS FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.75&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=GLC:ALPHA-D-GLUCOSE'>GLC</scene>, <scene name='pdbligand=IPT:ISOPROPYL-1-BETA-D-THIOGALACTOSIDE'>IPT</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</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=3ogs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ogs OCA], [https://pdbe.org/3ogs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3ogs RCSB], [https://www.ebi.ac.uk/pdbsum/3ogs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3ogs ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q70SY0_HYPJE Q70SY0_HYPJE] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
We have determined the crystal structure of Trichoderma reesei (Hypocrea jecorina) beta-galactosidase (Tr-beta-gal) at a 1.2A resolution and its complex structures with galactose, IPTG and PETG at 1.5, 1.75 and 1.4A resolutions, respectively. Tr-beta-gal is a potential enzyme for lactose hydrolysis in the dairy industry and belongs to family 35 of the glycoside hydrolases (GH-35). The high resolution crystal structures of this six-domain enzyme revealed interesting features about the structure of Tr-beta-gal. We discovered conformational changes in the two loop regions in the active site, implicating a conformational selection-mechanism for the enzyme. In addition, the Glu200, an acid/base catalyst showed two different conformations which undoubtedly affect the pK(a) value of this residue and the catalytic mechanism. The electron density showed extensive glycosylation, suggesting a structure stabilizing role for glycans. The longest glycan showed an electron density that extends to the eighth monosaccharide unit in the extended chain. The Tr-beta-gal structure also showed a well-ordered structure for a unique octaserine motif on the surface loop of the fifth domain.

Crystal structures of Trichoderma reesei beta-galactosidase reveal conformational changes in the active site.,Maksimainen M, Hakulinen N, Kallio JM, Timoharju T, Turunen O, Rouvinen J J Struct Biol. 2011 Apr;174(1):156-63. Epub 2010 Dec 3. PMID:21130883<ref>PMID:21130883</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3ogs" style="background-color:#fffaf0;"></div>

==See Also==
*[[Galactosidase 3D structures|Galactosidase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Trichoderma reesei]]
[[Category: Maksimainen M]]
[[Category: Rouvinen J]]