3JTQ

Mutations in Cephalosporin Acylase Affecting Stability and Autoproteolysis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural features of cephalosporin acylase reveal the basis of autocatalytic activation.

Cho, K.J.Kim, J.K.Lee, J.H.Shin, H.J.Park, S.S.Kim, K.H.

(2009) Biochem.Biophys.Res.Commun. 390: 342-348

  • DOI: 10.1016/j.bbrc.2009.09.134
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cephalosporin acylase (CA), a member of the N-terminal nucleophile hydrolase family, is activated through two steps of intramolecular autoproteolysis, the first mediated by a serine residue, and the second by a glutamate, which releases the pro-segme ...

    Cephalosporin acylase (CA), a member of the N-terminal nucleophile hydrolase family, is activated through two steps of intramolecular autoproteolysis, the first mediated by a serine residue, and the second by a glutamate, which releases the pro-segment and produces an active enzyme. In this study, we have determined the crystal structures of mutants which could affect primary or secondary auto-cleavage and of sequential intermediates of a slow-processing mutant at 2.0-2.5A resolutions. The pro-segments of the mutants undergo dynamic conformational changes during activation and adopt surprisingly different loop conformations from one another. However, the autoproteolytic site was found to form a catalytically competent conformation with a solvent water molecule, which was essentially conserved in the CA mutants.


    Organizational Affiliation

    Department of Life Sciences and Biotechnology, Korea University, Seoul 136-701, Republic of Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutaryl 7-aminocephalosporanic acid acylase
A
169Pseudomonas sp. GK16Mutation(s): 0 
Find proteins for A4ZVL3 (Pseudomonas sp. GK16)
Go to UniProtKB:  A4ZVL3
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Glutaryl 7-aminocephalosporanic acid acylase
B
528Pseudomonas sp. GK16Mutation(s): 1 
Find proteins for A4ZVL3 (Pseudomonas sp. GK16)
Go to UniProtKB:  A4ZVL3
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.209 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 73.836α = 90.00
b = 73.836β = 90.00
c = 384.184γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
DENZOdata reduction
PDB_EXTRACTdata extraction
HKL-2000data reduction
CNSphasing
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-01-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-01
    Type: Refinement description