5K20

Caspase-7 S239E Phosphomimetic

• PDB DOI: https://doi.org/10.2210/pdb5K20/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2016-05-18 Released: 2017-01-11 
• Deposition Author(s): Eron, S.J., Hardy, J.A.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.228 
• R-Value Work: 0.191 
• R-Value Observed: 0.195 

Literature

PAK2 Phosphorylation Inhibits Caspase-7 by Two Divergent Mechanisms: Slowing Activation and Blocking Substrate Binding

Eron, S.J., Hardy, J.A.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 4-mer - A2B2 

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

Biological Assembly Evidence: gel filtration, mass spectrometry, native gel electrophoresis

Macromolecule Content

• Total Structure Weight: 71.05 kDa 
• Atom Count: 3,831 
• Modelled Residue Count: 465 
• Deposited Residue Count: 622 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Caspase-7 large subunit	A, C	198	Homo sapiens	Mutation(s): 0  Gene Names: CASP7, MCH3 EC: 3.4.22.60
UniProt & NIH Common Fund Data Resources
Find proteins for P55210 (Homo sapiens) Explore P55210  Go to UniProtKB:  P55210
PHAROS:  P55210 GTEx:  ENSG00000165806

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Caspase-7 small subunit	B, D	113	Homo sapiens	Mutation(s): 1  Gene Names: CASP7, MCH3 EC: 3.4.22.60
UniProt & NIH Common Fund Data Resources
Find proteins for P55210 (Homo sapiens) Explore P55210  Go to UniProtKB:  P55210
PHAROS:  P55210 GTEx:  ENSG00000165806

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FMT	E [auth A], F [auth C], G [auth C]	FORMIC ACID C H2 O2 BDAGIHXWWSANSR-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.228 
• R-Value Work: 0.191 
• R-Value Observed: 0.195 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 88.757	α = 90
b = 88.757	β = 90
c = 185.141	γ = 120

Software Package:

Software Name	Purpose
HKL-2000	data reduction
SCALA	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2017-01-11 
Deposition Author(s): Eron, S.J., Hardy, J.A.

---

Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM080532

Revision History  

• Version 1.0: 2017-01-11
  Type: Initial release
  
• Version 1.1: 2017-09-20
  Changes: Author supporting evidence
• Version 1.2: 2017-11-01
  Changes: Author supporting evidence
• Version 1.3: 2019-12-25
  Changes: Author supporting evidence
• Version 1.4: 2023-09-27
  Changes: Advisory, Data collection, Database references, Refinement description