2QYI | pdb_00002qyi

Crystal structure of a binary complex between an engineered trypsin inhibitor and Bovine trypsin

• PDB DOI: https://doi.org/10.2210/pdb2QYI/pdb

• Classification: Hydrolase/Hydrolase inhibitor
• Organism(s): Bos taurus, Psophocarpus tetragonolobus
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2007-08-15 Released: 2008-08-19 
• Deposition Author(s): Khamrui, S., Dasgupta, J., Dattagupta, J.K., Sen, U.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 
  0.268 (Depositor) 
• R-Value Work: 
  0.208 (Depositor) 

Literature

Crystal structure of a binary complex between an engineered trypsin inhibitor and Bovine trypsin

Sen, U.

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.

Macromolecule Content 

• Total Structure Weight: 87.41 kDa 
• Atom Count: 6,315 
• Modeled Residue Count: 796 
• Deposited Residue Count: 812 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cationic trypsin	A, C	223	Bos taurus	Mutation(s): 0  EC: 3.4.21.4
UniProt
Find proteins for P00760 (Bos taurus) Explore P00760  Go to UniProtKB:  P00760

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Chymotrypsin inhibitor 3	B, D	183	Psophocarpus tetragonolobus	Mutation(s): 1
UniProt
Find proteins for P10822 (Psophocarpus tetragonolobus) Explore P10822  Go to UniProtKB:  P10822

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NI	F [auth B]	NICKEL (II) ION Ni VEQPNABPJHWNSG-UHFFFAOYSA-N
CA	E [auth A], G [auth C]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free:  0.268 (Depositor) 
• R-Value Work:  0.208 (Depositor) 

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 143.694	α = 90
b = 77.437	β = 103
c = 72.907	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
PDB_EXTRACT	data extraction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2008-08-19 
Deposition Author(s): Khamrui, S., Dasgupta, J., Dattagupta, J.K., Sen, U.

Revision History  

• Version 1.0: 2008-08-19
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2021-11-10
  Changes: Database references, Derived calculations
• Version 1.3: 2024-10-16
  Changes: Data collection, Structure summary