4U3A

Crystal structure of CtCel5E


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.42 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Biochemical Characterization and Structural Analysis of a Bifunctional Cellulase/Xylanase from Clostridium thermocellum

Yuan, S.F.Wu, T.H.Lee, H.L.Hsieh, H.Y.Lin, W.L.Yang, B.Chang, C.K.Li, Q.Gao, J.Huang, C.H.Ho, M.C.Guo, R.T.Liang, P.H.

(2015) J.Biol.Chem. 290: 5739-5748

  • DOI: 10.1074/jbc.M114.604454
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We expressed an active form of CtCel5E (a bifunctional cellulase/xylanase from Clostridium thermocellum), performed biochemical characterization, and determined its apo- and ligand-bound crystal structures. From the structures, Asn-93, His-168, His-1 ...

    We expressed an active form of CtCel5E (a bifunctional cellulase/xylanase from Clostridium thermocellum), performed biochemical characterization, and determined its apo- and ligand-bound crystal structures. From the structures, Asn-93, His-168, His-169, Asn-208, Trp-347, and Asn-349 were shown to provide hydrogen-bonding/hydrophobic interactions with both ligands. Compared with the structures of TmCel5A, a bifunctional cellulase/mannanase homolog from Thermotoga maritima, a flexible loop region in CtCel5E is the key for discriminating substrates. Moreover, site-directed mutagenesis data confirmed that His-168 is essential for xylanase activity, and His-169 is more important for xylanase activity, whereas Asn-93, Asn-208, Tyr-270, Trp-347, and Asn-349 are critical for both activities. In contrast, F267A improves enzyme activities.


    Organizational Affiliation

    the Industrial Enzymes National Engineering Laboratory, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China guo_rt@tib.cas.cn.,the Institute of Biochemical Sciences, and From the Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan, phliang@gate.sinica.edu.tw.,From the Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan.,the Institute of Biochemical Sciences, and From the Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan, joeho@gate.sinica.edu.tw.,the Institute of Biotechnology, National Taiwan University, Taipei 10617, Taiwan and.,the Institute of Biochemical Sciences, and.,the Industrial Enzymes National Engineering Laboratory, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Endoglucanase H
A, B
403Clostridium thermocellum (strain ATCC 27405 / DSM 1237 / NBRC 103400 / NCIMB 10682 / NRRL B-4536 / VPI 7372)Mutation(s): 0 
Gene Names: celH
EC: 3.2.1.4
Find proteins for P16218 (Clostridium thermocellum (strain ATCC 27405 / DSM 1237 / NBRC 103400 / NCIMB 10682 / NRRL B-4536 / VPI 7372))
Go to UniProtKB:  P16218
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.42 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.201 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 74.930α = 90.00
b = 74.930β = 90.00
c = 254.195γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-01-14
    Type: Initial release
  • Version 1.1: 2015-02-18
    Type: Database references
  • Version 1.2: 2015-03-11
    Type: Database references
  • Version 1.3: 2017-08-30
    Type: Data collection, Database references, Derived calculations, Source and taxonomy
  • Version 1.4: 2017-10-04
    Type: Data collection