4AUC

Bovine chymosin in complex with Pepstatin A

• PDB DOI: https://doi.org/10.2210/pdb4AUC/pdb

• Classification: HYDROLASE/HYDROLASE INHIBITOR
• Organism(s): Bos taurus, Actinomyces
• Expression System: Aspergillus niger
• Mutation(s): No 


• Deposited: 2012-05-16 Released: 2013-05-29 
• Deposition Author(s): Langholm Jensen, J., Navarro Poulsen, J.C., Jacobsen, J., van den Brink, J.M., Qvist, K.B., Larsen, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.197 
• R-Value Work: 0.174 
• R-Value Observed: 0.175 

Starting Model: experimental

Literature

The Structure of Bovine Chymosin in Complex with Pepstatin A

Langholm Jensen, J., Navarro Poulsen, J.C., Jacobsen, J., van den Brink, J.M., Qvist, K.B., Larsen, S.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Macromolecule Content

• Total Structure Weight: 36.74 kDa 
• Atom Count: 2,945 
• Modelled Residue Count: 329 
• Deposited Residue Count: 329 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CHYMOSIN	A	323	Bos taurus	Mutation(s): 0  EC: 3.4.23.4
UniProt
Find proteins for P00794 (Bos taurus) Explore P00794  Go to UniProtKB:  P00794

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
PEPSTATIN A	B	6	Actinomyces	Mutation(s): 0

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CD	D [auth A]	CADMIUM ION Cd WLZRMCYVCSSEQC-UHFFFAOYSA-N
EDO	E [auth A], F [auth A], G [auth A], H [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
NA	C [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.197 
• R-Value Work: 0.174 
• R-Value Observed: 0.175 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 93.5	α = 90
b = 93.5	β = 90
c = 89	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XDS	data scaling
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-05-29 
Deposition Author(s): Langholm Jensen, J., Navarro Poulsen, J.C., Jacobsen, J., van den Brink, J.M., Qvist, K.B., Larsen, S.

Revision History  

• Version 1.0: 2013-05-29
  Type: Initial release
  
• Version 1.1: 2018-01-17
  Changes: Database references
• Version 2.0: 2023-12-20
  Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Other, Refinement description
• Version 2.1: 2024-11-13
  Changes: Structure summary