Substrate Specificity and Subsite Mobility in T. Aurantiacus Xylanase 10ALo Leggio, L., Kalogiannis, S., Eckert, K., Teixeira, S.C.M., Bhat, M.K., Andrei, C., Pickersgill, R.W., Larsen, S.
(2001) FEBS Lett. 509: 303
- PubMed: 11741607
- Primary Citation of Related Structures:
- PubMed Abstract:
- Superfamilies: The 4/7 Superfamily of Beta/ Alpha-Barrel Glycosidases and the Right-Handed Parallel Beta-Helix Superfamily
Pickersgill, R.,Harris, G.,Lo Leggio, L.,Mayans, O.,Jenkins, J.
(1998) Biochem.Soc.Trans. 26: 190
- Anisotropic Refinement of the Structure of Thermoascus Aurantiacus Xylanase I
Teixeira, S.,Lo Leggio, L.,Pickersgill, R.,Cardin, C.
(2001) Acta Crystallogr.,Sect.D 57: 385
- High Resolution Structure and Sequence of T. Aurantiacus Xylanase I: Implications for the Evolution of Thermostability in Family 10 Xylanases and Enzymes with Beta/Alpha Barrel Architecture
Lo Leggio, L.,Kalogiannis, S.,Bhat, M.K.,Pickersgill, R.W.
(1999) Proteins 36: 295
- Structure Solution of Thermoascus Aurantiacus Xylanase. Structural Studies of Xylanases and Endoglucanases
Lo Leggio, L.
(1997) Structural Studies of Xylanases and Endoglucanases --: 194
The substrate specificity of Thermoascus aurantiacus xylanase 10A (TAX) has been investigated both biochemically and structurally. High resolution crystallographic analyses at 291 K and 100 K of TAX complexes with xylobiose show that the ligand is in ...
The substrate specificity of Thermoascus aurantiacus xylanase 10A (TAX) has been investigated both biochemically and structurally. High resolution crystallographic analyses at 291 K and 100 K of TAX complexes with xylobiose show that the ligand is in its alpha anomeric conformation and provide a rationale for specificity on p-nitrophenyl glycosides at the -1 and -2 subsites. Trp 275, which is disordered in uncomplexed structures, is stabilised by its interaction with xylobiose. Two structural subsets in family 10 are identified, which differ by the presence or absence of a short helical stretch in the eighth betaalpha-loop of the TIM barrel, the loop bearing Trp 275. This structural difference is discussed in the context of Trp 275 mobility and xylanase function.
Centre for Crystallographic Studies, Chemical Institute, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark. firstname.lastname@example.org