1GOK

Thermostable xylanase I from Thermoascus aurantiacus- Crystal form II


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.14 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Substrate Specificity and Subsite Mobility in T. Aurantiacus Xylanase 10A

Lo 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

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • 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.


    Related Citations: 
    • 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: Struct.,Funct., Genet. 36: 295
    • 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
    • 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
    • Structure Solution of Thermoascus Aurantiacus Xylanase. Structural Studies of Xylanases and Endoglucanases
      Lo Leggio, L.
      (1997) Structural Studies of Xylanases and Endoglucanases --: 194


    Organizational Affiliation

    Centre for Crystallographic Studies, Chemical Institute, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark. leila@ccs.ki.ku.dk




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ENDO-1,4-BETA-XYLANASE
A
303Thermoascus aurantiacusMutation(s): 0 
Gene Names: XYNA
EC: 3.2.1.8
Find proteins for P23360 (Thermoascus aurantiacus)
Go to UniProtKB:  P23360
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
A
L-PEPTIDE LINKINGC5 H7 N O3GLU
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.14 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.180 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 46.220α = 90.00
b = 59.240β = 109.80
c = 51.310γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
AMoREphasing
DENZOdata reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-10-25
    Type: Initial release
  • Version 1.1: 2013-09-04
    Type: Database references, Derived calculations, Non-polymer description, Other, Refinement description, Structure summary, Version format compliance