1GOQ

Thermostable xylanase I from Thermoascus aurantiacus - Room temperature xylobiose complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.167 

wwPDB Validation 3D Report Full Report



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

  • DOI: 10.1016/s0014-5793(01)03177-5
  • Structures With Same Primary Citation

  • 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: 
    • Anisotropic Refinement of the Structure of Thermoascus Aurantiacus Xylanase I
      Teixeira, S., Lo Leggio, L., Pickersgill, R., Cardin, C.
      (2001) Acta Crystallogr D Biol Crystallogr 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
    • 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
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
XYP
Query on XYP

Download CCD File 
A
BETA-D-XYLOPYRANOSE
C5 H10 O5
SRBFZHDQGSBBOR-KKQCNMDGSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
A
L-PEPTIDE LINKINGC5 H7 N O3GLN
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.167 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.06α = 90
b = 59.56β = 110.8
c = 51.13γ = 90
Software Package:
Software NamePurpose
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-12-07
    Type: Initial release
  • Version 1.1: 2014-10-22
    Changes: Database references, Derived calculations, Non-polymer description, Other, Version format compliance
  • Version 1.2: 2019-05-08
    Changes: Data collection, Derived calculations, Experimental preparation, Other
  • Version 2.0: 2020-03-11
    Changes: Data collection, Other, Polymer sequence