Human cathepsin G

Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.190 

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This is version 1.4 of the entry. See complete history


The 1.8 A crystal structure of human cathepsin G in complex with Suc-Val-Pro-PheP-(OPh)2: a Janus-faced proteinase with two opposite specificities.

Hof, P.Mayr, I.Huber, R.Korzus, E.Potempa, J.Travis, J.Powers, J.C.Bode, W.

(1996) EMBO J 15: 5481-5491

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The crystal structure of human neutrophil cathepsin G, complexed with the peptidyl phosphonate inhibitor Suc-Val-Pro-PheP-(OPh)2, has been determined to a resolution of 1.8 A using Patterson search techniques. The cathepsin G structure shows the polypeptide fold characteristic of trypsin-like serine proteinases and is especially similar to rat mast cell proteinase II. Unique to cathepsin G, however, is the presence of Glu226 (chymotrypsinogen numbering), which is situated at the bottom of the S1 specificity pocket, dividing it into two compartments. For this reason, the benzyl side chain of the inhibitor PheP residue does not fully occupy the pocket but is, instead, located at its entrance. Its positively charged equatorial edge is involved in a favourable electrostatic interaction with the negatively charged carboxylate group of Glu226. Arrangement of this Glu226 carboxylate would also allow accommodation of a Lys side chain in this S1 pocket, in agreement with the recently observed cathepsin G preference for Lys and Phe at P1. The cathepsin G complex with the covalently bound phosphonate inhibitor mimics a tetrahedral substrate intermediate. A comparison of the Arg surface distributions of cathepsin G, leukocyte elastase and rat mast cell protease II shows no simple common recognition pattern for a mannose-6-phosphate receptor-independent targeting mechanism for sorting of these granular proteinases.

  • Organizational Affiliation

    Max-Planck-Institut für Biochemie, Planegg-Martinsried, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CATHEPSIN G224Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P08311 (Homo sapiens)
Explore P08311 
Go to UniProtKB:  P08311
PHAROS:  P08311
GTEx:  ENSG00000100448 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08311
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 1ZG

Download Ideal Coordinates CCD File 
B [auth A]N-(3-carboxypropanoyl)-L-valyl-N-{(1R)-1-[(S)-hydroxy(oxido)phosphanyl]-2-phenylethyl}-L-prolinamide
C22 H32 N3 O8 P
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.190 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.04α = 90
b = 63.61β = 90
c = 79.72γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
ROTAVATAdata reduction
Agrovatadata reduction
X-PLORmodel building
CCP4data scaling
ROTAVATAdata scaling

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-07-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.3: 2012-12-12
    Changes: Other
  • Version 1.4: 2024-04-03
    Changes: Data collection, Database references, Derived calculations, Refinement description