1GOO

Thermostable xylanase I from Thermoascus aurantiacus - Cryocooled glycerol complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.175 

wwPDB Validation   3D Report Full Report


This is version 2.0 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

  • DOI: 10.1016/s0014-5793(01)03177-5
  • Primary Citation of Related Structures:  
    1GOK, 1GOM, 1GOO, 1GOQ, 1GOR, 1K6A

  • 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 its alpha anomeric conformation and provide a rationale for specificity on p-nitrophenyl glycosides at the -1 and -2 subsites ...

    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: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ENDO-1,4-BETA-XYLANASEA303Thermoascus aurantiacusMutation(s): 0 
Gene Names: XYNA
EC: 3.2.1.8
UniProt
Find proteins for P23360 (Thermoascus aurantiacus)
Explore P23360 
Go to UniProtKB:  P23360
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP23360
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL
Download Ideal Coordinates CCD File 
B [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-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: 1.87 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.175 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.61α = 90
b = 58.947β = 111.67
c = 50.752γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-12-03
    Type: Initial release
  • Version 1.1: 2011-08-17
    Changes: Derived calculations, Non-polymer description, Other, Refinement description, Structure summary, Version format compliance
  • Version 1.2: 2014-10-22
    Changes: Database references
  • Version 1.3: 2019-05-08
    Changes: Data collection, Derived calculations, Experimental preparation, Other
  • Version 2.0: 2020-03-11
    Changes: Other, Polymer sequence