1N8O

Crystal structure of a complex between bovine chymotrypsin and ecotin

• PDB DOI: https://doi.org/10.2210/pdb1N8O/pdb

• Classification: HYDROLASE
• Organism(s): Bos taurus, Escherichia coli K-12
• Mutation(s): No 


• Deposited: 2002-11-21 Released: 2002-12-18 
• Deposition Author(s): Cambillau, C., Spinelli, S., Lauwereys, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.205 
• R-Value Observed: 0.205 

Starting Model: experimental

Literature

Crystal Structure of a Complex Between Bovine Chymotrypsin and Ecotin at 2.0 A Resolution

Cambillau, C., Spinelli, S., Lauwereys, M.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 8-mer - A2B2C2D2 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 8-mer - A2B2C2D1E1 Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 41.38 kDa 
• Atom Count: 3,009 
• Modelled Residue Count: 375 
• Deposited Residue Count: 383 
• Unique protein chains: 4

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chymotrypsin A, A chain	A	13	Bos taurus	Mutation(s): 0  EC: 3.4.21.1
UniProt
Find proteins for P00766 (Bos taurus) Explore P00766  Go to UniProtKB:  P00766

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Chymotrypsin A, b chain	B	131	Bos taurus	Mutation(s): 0  EC: 3.4.21.1
UniProt
Find proteins for P00766 (Bos taurus) Explore P00766  Go to UniProtKB:  P00766

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Chymotrypsin A, C chain	C	97	Bos taurus	Mutation(s): 0  EC: 3.4.21.1
UniProt
Find proteins for P00766 (Bos taurus) Explore P00766  Go to UniProtKB:  P00766

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
ecotin	D [auth E]	142	Escherichia coli K-12	Mutation(s): 0
UniProt
Find proteins for P23827 (Escherichia coli (strain K12)) Explore P23827  Go to UniProtKB:  P23827

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.205 
• R-Value Observed: 0.205 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 95.5	α = 90
b = 63.8	β = 91.7
c = 79.6	γ = 90

Software Package:

Software Name	Purpose
XDS	data scaling
XDS	data reduction
AMoRE	phasing
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2002-12-18 
Deposition Author(s): Cambillau, C., Spinelli, S., Lauwereys, M.

Revision History  

• Version 1.0: 2002-12-18
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Source and taxonomy, Version format compliance
• Version 1.3: 2017-10-11
  Changes: Refinement description
• Version 1.4: 2018-01-24
  Changes: Refinement description
• Version 1.5: 2024-04-03
  Changes: Data collection, Database references, Refinement description
• Version 1.6: 2024-10-30
  Changes: Structure summary