3GCB

GAL6 (YEAST BLEOMYCIN HYDROLASE) MUTANT C73A/DELTAK454


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The unusual active site of Gal6/bleomycin hydrolase can act as a carboxypeptidase, aminopeptidase, and peptide ligase.

Zheng, W.Johnston, S.A.Joshua-Tor, L.

(1998) Cell 93: 103-109

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The Gal6 protease is in a class of cysteine peptidases identified by their ability to inactivate the anti-cancer drug bleomycin. The protein forms a barrel structure with the active sites embedded in a channel as in the proteasome. In Gal6 the C term ...

    The Gal6 protease is in a class of cysteine peptidases identified by their ability to inactivate the anti-cancer drug bleomycin. The protein forms a barrel structure with the active sites embedded in a channel as in the proteasome. In Gal6 the C termini lie in the active site clefts. We show that Gal6 acts as a carboxypeptidase on its C terminus to convert itself to an aminopeptidase and peptide ligase. The substrate specificity of the peptidase activity is determined by the position of the C terminus of Gal6 rather than the sequence of the substrate. We propose a model to explain these diverse activities and Gal6's singular ability to inactivate bleomycin.


    Related Citations: 
    • Crystal Structure of a Conserved Protease that Binds DNA: The Bleomycin Hydrolase, Gal6
      Joshua-Tor, L.,Xu, H.E.,Johnston, S.A.,Rees, D.C.
      (1995) Science 269: 945


    Organizational Affiliation

    Center for Biomedical Inventions, Department of Medicine, University of Texas-Southwestern Medical Center, Dallas 75235-8573, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GAL6
A
470Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutations: A90C
Gene Names: LAP3 (BLH1, GAL6, YCP1)
EC: 3.4.22.40
Find proteins for Q01532 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: LAP3
Go to UniProtKB:  Q01532
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
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: 1.87 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.173 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 150.547α = 90.00
b = 150.547β = 90.00
c = 90.134γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-10-21
    Type: Initial release
  • Version 1.1: 2008-03-25
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance