1ORF

The Oligomeric Structure of Human Granzyme A Reveals the Molecular Determinants of Substrate Specificity


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The oligomeric structure of human granzyme A is a determinant of its extended substrate specificity.

Bell, J.K.Goetz, D.H.Mahrus, S.Harris, J.L.Fletterick, R.J.Craik, C.S.

(2003) Nat.Struct.Mol.Biol. 10: 527-534

  • DOI: 10.1038/nsb944

  • PubMed Abstract: 
  • The cell death-inducing serine protease granzyme A (GzmA) has a unique disulfide-linked quaternary structure. The structure of human GzmA bound to a tripeptide CMK inhibitor, determined at a resolution of 2.4 A, reveals that the oligomeric state cont ...

    The cell death-inducing serine protease granzyme A (GzmA) has a unique disulfide-linked quaternary structure. The structure of human GzmA bound to a tripeptide CMK inhibitor, determined at a resolution of 2.4 A, reveals that the oligomeric state contributes to substrate selection by limiting access to the active site for potential macromolecular substrates and inhibitors. Unlike other serine proteases, tetrapeptide substrate preferences do not correlate well with natural substrate cleavage sequences. This suggests that the context of the cleavage sequence within a macromolecular substrate imposes another level of selection not observed with the peptide substrates. Modeling of inhibitors bound to the GzmA active site shows that the dimer also contributes to substrate specificity in a unique manner by extending the active-site cleft. The crystal structure, along with substrate library profiling and mutagenesis, has allowed us to identify and rationally manipulate key components involved in GzmA substrate specificity.


    Organizational Affiliation

    Department of Pharmaceutical Chemistry, University of California, San Francisco, California 94143, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Granzyme A
A
234Homo sapiensMutation(s): 1 
Gene Names: GZMA (CTLA3, HFSP)
EC: 3.4.21.78
Find proteins for P12544 (Homo sapiens)
Go to Gene View: GZMA
Go to UniProtKB:  P12544
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
0G6
Query on 0G6

Download SDF File 
Download CCD File 
A
D-phenylalanyl-N-[(2S,3S)-6-{[amino(iminio)methyl]amino}-1-chloro-2-hydroxyhexan-3-yl]-L-prolinamide
PPACK
C21 H34 Cl N6 O3
DVFLYEYCMMLBTQ-VSZNYVQBSA-O
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000020 (0G6)
Query on PRD_000020
AD-Phe-Pro-Arg-CH2ClPeptide-like / Inhibitor

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.191 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 115.034α = 90.00
b = 145.022β = 90.00
c = 39.555γ = 90.00
Software Package:
Software NamePurpose
EPMRphasing
DENZOdata reduction
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-07-01
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.3: 2013-02-27
    Type: Other