| Structural highlights
1gz1 is a 1 chain structure with sequence from Atcc 16454. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Ligands: | , , , , |
| Related: | 1bvw, 1hgw, 1hgy, 1oc5, 1oc6, 1oc7, 1ocb, 1ocj, 1ocn, 1qjw, 1qk0, 1qk2, 2bvw |
| Activity: | Cellulose 1,4-beta-cellobiosidase (non-reducing end), with EC number 3.2.1.91 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The enzymatic degradation of cellulose continues to be one of the most important enzyme-catalysed reactions. Glycoside hydrolases from family GH-6 hydrolyse cellulose with inversion of the configuration of the anomeric carbon. Whilst the catalytic proton donor has been clearly identified (Asp226 in Humicola insolens Cel6A), the identification and even the existence of a potential Bronsted base remains unclear. Equally controversial is the role of surface-loop flexibility. Here, the structure of the D416A mutant of the H. insolens cellobiohydrolase Cel6A in complex with a non-hydrolysable thiooligosaccharide methyl cellobiosyl-4-thio-beta-cellobioside at 1.9 A resolution is presented. Substrate distortion in the -1 subsite, to a (2)S(0) skew-boat conformation, is observed, similar to that seen in the analogous Trichoderma reesei Cel6A structure [Zou et al. (1999), Structure, 7, 1035-1045], but the active-centre N-terminal loop of the H. insolens enzyme is found in a more open conformation than described for previous structures.
Structure of the Humicola insolens cellobiohydrolase Cel6A D416A mutant in complex with a non-hydrolysable substrate analogue, methyl cellobiosyl-4-thio-beta-cellobioside, at 1.9 A.,Varrot A, Frandsen TP, Driguez H, Davies GJ Acta Crystallogr D Biol Crystallogr. 2002 Dec;58(Pt 12):2201-4. Epub 2002, Nov 23. PMID:12454501[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Varrot A, Frandsen TP, Driguez H, Davies GJ. Structure of the Humicola insolens cellobiohydrolase Cel6A D416A mutant in complex with a non-hydrolysable substrate analogue, methyl cellobiosyl-4-thio-beta-cellobioside, at 1.9 A. Acta Crystallogr D Biol Crystallogr. 2002 Dec;58(Pt 12):2201-4. Epub 2002, Nov 23. PMID:12454501
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