1uu6
From Proteopedia
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|PDB= 1uu6 |SIZE=350|CAPTION= <scene name='initialview01'>1uu6</scene>, resolution 1.40Å | |PDB= 1uu6 |SIZE=350|CAPTION= <scene name='initialview01'>1uu6</scene>, resolution 1.40Å | ||
|SITE= <scene name='pdbsite=AC1:Pg4+Binding+Site+For+Chain+A'>AC1</scene> | |SITE= <scene name='pdbsite=AC1:Pg4+Binding+Site+For+Chain+A'>AC1</scene> | ||
| - | |LIGAND= <scene name='pdbligand=PG4:TETRAETHYLENE GLYCOL'>PG4</scene> | + | |LIGAND= <scene name='pdbligand=BGC:BETA-D-GLUCOSE'>BGC</scene>, <scene name='pdbligand=PCA:PYROGLUTAMIC+ACID'>PCA</scene>, <scene name='pdbligand=PG4:TETRAETHYLENE+GLYCOL'>PG4</scene> |
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/Cellulase Cellulase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.4 3.2.1.4] | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Cellulase Cellulase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.4 3.2.1.4] </span> |
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1uu6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1uu6 OCA], [http://www.ebi.ac.uk/pdbsum/1uu6 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1uu6 RCSB]</span> | ||
}} | }} | ||
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[[Category: Shaw, A.]] | [[Category: Shaw, A.]] | ||
[[Category: Stahlberg, J.]] | [[Category: Stahlberg, J.]] | ||
| - | [[Category: PG4]] | ||
[[Category: cellulase]] | [[Category: cellulase]] | ||
[[Category: cellulose degradation]] | [[Category: cellulose degradation]] | ||
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[[Category: ligand complex]] | [[Category: ligand complex]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 00:15:22 2008'' |
Revision as of 21:15, 30 March 2008
| |||||||
| , resolution 1.40Å | |||||||
|---|---|---|---|---|---|---|---|
| Sites: | |||||||
| Ligands: | , , | ||||||
| Activity: | Cellulase, with EC number 3.2.1.4 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
X-RAY CRYSTAL STRUCTURE OF THE CATALYTIC DOMAIN OF HUMICOLA GRISEA CEL12A IN COMPLEX WITH A SOAKED CELLOPENTAOSE
Overview
As part of an ongoing enzyme discovery program to investigate the properties and catalytic mechanism of glycoside hydrolase family 12 (GH 12) endoglucanases, a GH family that contains several cellulases that are of interest in industrial applications, we have solved four new crystal structures of wild-type Humicola grisea Cel12A in complexes formed by soaking with cellobiose, cellotetraose, cellopentaose, and a thio-linked cellotetraose derivative (G2SG2). These complex structures allow mapping of the non-covalent interactions between the enzyme and the glucosyl chain bound in subsites -4 to +2 of the enzyme, and shed light on the mechanism and function of GH 12 cellulases. The unhydrolysed cellopentaose and the G2SG2 cello-oligomers span the active site of the catalytically active H.grisea Cel12A enzyme, with the pyranoside bound in subsite -1 displaying a S31 skew boat conformation. After soaking in cellotetraose, the cello-oligomer that is found bound in site -4 to -1 contains a beta-1,3-linkage between the two cellobiose units in the oligomer, which is believed to have been formed by a transglycosylation reaction that has occurred during the ligand soak of the protein crystals. The close fit of this ligand and the binding sites occupied suggest a novel mixed beta-glucanase activity for this enzyme.
About this Structure
1UU6 is a Single protein structure of sequence from Humicola grisea. Full crystallographic information is available from OCA.
Reference
Crystal complex structures reveal how substrate is bound in the -4 to the +2 binding sites of Humicola grisea Cel12A., Sandgren M, Berglund GI, Shaw A, Stahlberg J, Kenne L, Desmet T, Mitchinson C, J Mol Biol. 2004 Oct 1;342(5):1505-17. PMID:15364577
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