3NIY

Crystal structure of native xylanase 10B from Thermotoga petrophila RKU-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.58 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.160 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Thermal-induced conformational changes in the product release area drive the enzymatic activity of xylanases 10B: Crystal structure, conformational stability and functional characterization of the xylanase 10B from Thermotoga petrophila RKU-1.

Santos, C.R.Meza, A.N.Hoffmam, Z.B.Silva, J.C.Alvarez, T.M.Ruller, R.Giesel, G.M.Verli, H.Squina, F.M.Prade, R.A.Murakami, M.T.

(2010) Biochem Biophys Res Commun 403: 214-219

  • DOI: https://doi.org/10.1016/j.bbrc.2010.11.010
  • Primary Citation of Related Structures:  
    3NIY, 3NJ3

  • PubMed Abstract: 

    Endo-xylanases play a key role in the depolymerization of xylan and recently, they have attracted much attention owing to their potential applications on biofuels and paper industries. In this work, we have investigated the molecular basis for the action mode of xylanases 10B at high temperatures using biochemical, biophysical and crystallographic methods. The crystal structure of xylanase 10B from hyperthermophilic bacterium Thermotoga petrophila RKU-1 (TpXyl10B) has been solved in the native state and in complex with xylobiose. The complex crystal structure showed a classical binding mode shared among other xylanases, which encompasses the -1 and -2 subsites. Interestingly, TpXyl10B displayed a temperature-dependent action mode producing xylobiose and xylotriose at 20°C, and exclusively xylobiose at 90°C as assessed by capillary zone electrophoresis. Moreover, circular dichroism spectroscopy suggested a coupling effect of temperature-induced structural changes with this particular enzymatic behavior. Molecular dynamics simulations supported the CD analysis suggesting that an open conformational state adopted by the catalytic loop (Trp297-Lys326) provokes significant modifications in the product release area (+1,+2 and +3 subsites), which drives the enzymatic activity to the specific release of xylobiose at high temperatures.


  • Organizational Affiliation

    Laboratório Nacional de Biociências (LNBio), Centro Nacional de Pesquisa em Energia e Materiais, Campinas, SP, Brazil.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Endo-1,4-beta-xylanase
A, B
341Thermotoga petrophila RKU-1Mutation(s): 0 
Gene Names: Tpet_0854
EC: 3.2.1.8
UniProt
Find proteins for A5IL00 (Thermotoga petrophila (strain ATCC BAA-488 / DSM 13995 / JCM 10881 / RKU-1))
Explore A5IL00 
Go to UniProtKB:  A5IL00
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA5IL00
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
C [auth A],
D [auth A],
E [auth A],
F [auth A],
J [auth B]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
ACT
Query on ACT

Download Ideal Coordinates CCD File 
G [auth A],
H [auth A],
I [auth A],
K [auth B],
L [auth B]
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.58 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.160 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.538α = 84.54
b = 58.554β = 70.82
c = 61.579γ = 68.87
Software Package:
Software NamePurpose
MAR345dtbdata collection
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-05-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-08
    Changes: Refinement description
  • Version 1.3: 2024-02-21
    Changes: Data collection, Database references, Derived calculations