2O9Q | pdb_00002o9q

The crystal structure of Bovine Trypsin complexed with a small inhibition peptide ORB2K

• PDB DOI: https://doi.org/10.2210/pdb2O9Q/pdb

• Classification: HYDROLASE
• Organism(s): Bos taurus
• Mutation(s): No 


• Deposited: 2006-12-14 Released: 2007-12-25 
• Deposition Author(s): Li, J., Zhang, C., Xu, X., Wang, J., Gong, W., Lai, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 
  0.195 (Depositor), 0.199 (DCC) 
• R-Value Work: 
  0.155 (Depositor), 0.156 (DCC) 
• R-Value Observed: 
  0.157 (Depositor) 

Starting Model: experimental

Literature

From protease inhibitor to antibiotics: single point mutation makes tremendous functional shift

Li, J., Zhang, C., Xu, X., Wang, J., Yang, H., Xu, C., Ma, D., Wang, Y., Gong, W., Lai, R.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 25.55 kDa 
• Atom Count: 2,078 
• Modeled Residue Count: 237 
• Deposited Residue Count: 240 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cationic trypsin	A	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
ORB2K	B [auth C]	17	N/A	Mutation(s): 0

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	D [auth A], E [auth A], F [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
CA	C [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free:  0.195 (Depositor), 0.199 (DCC) 
• R-Value Work:  0.155 (Depositor), 0.156 (DCC) 
• R-Value Observed: 0.157 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 46.016	α = 90
b = 63.451	β = 90
c = 69.684	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection
HKL-2000	data reduction
HKL-2000	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-12-25 
Deposition Author(s): Li, J., Zhang, C., Xu, X., Wang, J., Gong, W., Lai, R.

Revision History  

• Version 1.0: 2007-12-25
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2017-10-18
  Changes: Refinement description
• Version 1.3: 2023-10-25
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.4: 2024-11-13
  Changes: Structure summary