Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 61.05 kDa 
• Atom Count: 4287 
• Residue Count: 530 
• Unique protein chains: 1

1GQF

Crystal structure of human procaspase-7

• DOI: 10.2210/pdb1GQF/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2001-11-23 Released: 2002-01-04 
• Deposition Author(s): Riedl, S., Bode, W., Fuentes-Prior, P.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Free: 0.285 
• R-Value Work: 0.268 
• R-Value Observed: 0.268 

Literature

Structural basis for the activation of human procaspase-7.

Riedl, S.J., Fuentes-Prior, P., Renatus, M., Kairies, N., Krapp, S., Huber, R., Salvesen, G.S., Bode, W.

(2001) Proc Natl Acad Sci U S A 98: 14790-14795

• PubMed: 11752425 
• DOI: 10.1073/pnas.221580098
• Primary Citation of Related Structures:  
  1GQF


• PubMed Abstract: 
  

Caspases form a family of proteinases required for the initiation and execution phases of apoptosis. Distinct proapoptotic stimuli lead to activation of the initiator caspases-8 and -9, which in turn activate the common executioner caspases-3 and -7 by proteolytic cleavage. Whereas crystal structures of several active caspases have been reported, no three-dimensional structure of an uncleaved caspase zymogen is available so far. We have determined the 2.9-A crystal structure of recombinant human C285A procaspase-7 and have elucidated the activation mechanism of caspases. The overall fold of the homodimeric procaspase-7 resembles that of the active tetrameric caspase-7. Each monomer is organized in two structured subdomains connected by partially flexible linkers, which asymmetrically occupy and block the central cavity, a typical feature of active caspases. This blockage is incompatible with a functional substrate binding site/active site. After proteolytic cleavage within the flexible linkers, the newly formed chain termini leave the cavity and fold outward to form stable structures. These conformational changes are associated with the formation of an intact active-site cleft. Therefore, this mechanism represents a formerly unknown type of proteinase zymogen activation.

---

Organizational Affiliation: 

Abteilung Strukturforschung, Max-Planck-Institut für Biochemie, Am Klopferspitz 18a, D-82152 Martinsried, Germany. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Caspase-7	A, B	265	Homo sapiens	Mutation(s): 1  Gene Names: CASP7, MCH3 EC: 3.4.22.60
Find proteins for P55210 (Homo sapiens) Explore P55210  Go to UniProtKB:  P55210
NIH Common Fund Data Resources
PHAROS:  P55210 GTEx:  ENSG00000165806

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	A, B	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Free: 0.285 
• R-Value Work: 0.268 
• R-Value Observed: 0.268 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 90.21	α = 90
b = 90.21	β = 90
c = 183.02	γ = 120

Software Package:

Software Name	Purpose
CNS	refinement
MOSFLM	data reduction
SCALA	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-11-23 
• Released Date: 2002-01-04 
Deposition Author(s): Riedl, S., Bode, W., Fuentes-Prior, P.

Revision History 

• Version 1.0: 2002-01-04
  Type: Initial release
  
• Version 1.1: 2015-09-16
  Changes: Database references, Derived calculations, Non-polymer description, Other, Refinement description, Structure summary, Version format compliance
• Version 1.2: 2018-11-07
  Changes: Advisory, Data collection, Database references, Experimental preparation, Source and taxonomy, Structure summary