2P0R | pdb_00002p0r

Structure of Human Calpain 9 in complex with Leupeptin

• PDB DOI: https://doi.org/10.2210/pdb2P0R/pdb

• Classification: HYDROLASE/HYDROLASE INHIBITOR
• Organism(s): Homo sapiens, Streptomyces roseus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2007-03-01 Released: 2007-03-20 
• Deposition Author(s): Davis, T.L., Paramanathan, R., Walker, J.R., Butler-Cole, C., Finerty Jr., P.J., Weigelt, J., Sundstrom, M., Arrowsmith, C.H., Edwards, A.M., Bochkarev, A., Dhe-Paganon, S., Structural Genomics Consortium (SGC)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 
  0.269 (Depositor), 0.272 (DCC) 
• R-Value Work: 
  0.210 (Depositor), 0.216 (DCC) 
• R-Value Observed: 
  0.213 (Depositor) 

Starting Model: experimental

Literature

Structures of Human Minicalpains bound to Inhibitors

Davis, T.L., Paramanathan, R., Walker, J.R., Butler-Cole, C., Finerty Jr., P.J., Weigelt, J., Sundstrom, M., Arrowsmith, C.H., Edwards, A.M., Bochkarev, A., Dhe-Paganon, S.

To be published.

Biological Assembly 1  

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

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

Macromolecule Content 

• Total Structure Weight: 76.12 kDa 
• Atom Count: 5,437 
• Modeled Residue Count: 646 
• Deposited Residue Count: 674 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Calpain-9	A, B	333	Homo sapiens	Mutation(s): 0  Gene Names: CAPN9, NCL4 EC: 3.4.22.52 (PDB Primary Data), 3.4.22 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for O14815 (Homo sapiens) Explore O14815  Go to UniProtKB:  O14815
PHAROS:  O14815 GTEx:  ENSG00000135773

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
leupeptin	C [auth D], D [auth E]	4	Streptomyces roseus	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA	E [auth A], F [auth A], G [auth A], H [auth B], I [auth B]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
AR7	C [auth D], D [auth E]	PEPTIDE-LIKE	C6 H17 N4 O2		ARG

Biologically Interesting Molecules (External Reference) 

1 Unique

Entity ID: 2
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_000216	C [auth D], D [auth E]	LEUPEPTIN	Oligopeptide / Enzyme inhibitor

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free:  0.269 (Depositor), 0.272 (DCC) 
• R-Value Work:  0.210 (Depositor), 0.216 (DCC) 
• R-Value Observed: 0.213 (Depositor) 

Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 97.165	α = 90
b = 97.165	β = 90
c = 173.378	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-03-20 
Deposition Author(s): Davis, T.L., Paramanathan, R., Walker, J.R., Butler-Cole, C., Finerty Jr., P.J., Weigelt, J., Sundstrom, M., Arrowsmith, C.H., Edwards, A.M., Bochkarev, A., Dhe-Paganon, S., Structural Genomics Consortium (SGC)

Revision History  

• Version 1.0: 2007-03-20
  Type: Initial release
  
• Version 1.1: 2008-05-01
  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: 2023-08-30
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.5: 2024-10-30
  Changes: Structure summary