6IFE

A Glycoside Hydrolase Family 43 beta-Xylosidase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.162 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Biochemical and structural properties of a low-temperature-active glycoside hydrolase family 43 beta-xylosidase: Activity and instability at high neutral salt concentrations.

Zhang, R.Li, N.Liu, Y.Han, X.Tu, T.Shen, J.Xu, S.Wu, Q.Zhou, J.Huang, Z.

(2019) Food Chem 301: 125266-125266

  • DOI: 10.1016/j.foodchem.2019.125266
  • Primary Citation of Related Structures:  
    6IFE

  • PubMed Abstract: 
  • β-Xylosidase, of the glycoside hydrolase family 43 from Bacillus sp. HJ14, was expressed in Escherichia coli. Recombinant β-xylosidase (rHJ14GH43) exhibited maximum activity at 25 °C, approximately 15, 45, and 88% of maximum activity at 0, 10, and 20 °C, respectively, and poor stability at temperatures over 20 °C ...

    β-Xylosidase, of the glycoside hydrolase family 43 from Bacillus sp. HJ14, was expressed in Escherichia coli. Recombinant β-xylosidase (rHJ14GH43) exhibited maximum activity at 25 °C, approximately 15, 45, and 88% of maximum activity at 0, 10, and 20 °C, respectively, and poor stability at temperatures over 20 °C. rHJ14GH43 showed moderate or high activity, but poor stability, in NaCl, KCl, NaNO 3 , KNO 3 , Na 2 SO 4 , and (NH 4 ) 2 SO 4 at concentrations from 3.0 to 30.0% (w/v). The crystal structure of rHJ14GH43 was resolved and showed higher structural flexibility due to fewer salt bridges and hydrogen bonds compared to mesophilic and thermophilic β-xylosidases. High structural flexibility is presumed to be a key factor for catalytic adaptations to low temperatures and high salt concentrations. Approximately one-third of the surface of rHJ14GH43 is positively charged, which may be the primary factor responsible for poor stability in high neutral salt environments.


    Organizational Affiliation

    Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Yunnan Normal University, Kunming 650500, PR China; College of Life Sciences, Yunnan Normal University, Kunming 650500, PR China; Key Laboratory of Yunnan for Biomass Energy and Biotechnology of Environment, Yunnan, Kunming 650500, PR China. Electronic address: huangzunxi@163.com.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-xylosidaseA, B553Bacillus pumilusMutation(s): 0 
Gene Names: B4107_1875
EC: 3.2.1.37
Find proteins for A0A4V8GZZ0 (Bacillus pumilus)
Explore A0A4V8GZZ0 
Go to UniProtKB:  A0A4V8GZZ0
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.162 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 123.637α = 90
b = 106.135β = 122.51
c = 105.884γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
HKL-3000phasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina31660445

Revision History  (Full details and data files)

  • Version 1.0: 2019-03-13
    Type: Initial release
  • Version 1.1: 2019-09-25
    Changes: Data collection, Database references
  • Version 1.2: 2019-10-02
    Changes: Data collection, Database references, Source and taxonomy