2PTC

THE GEOMETRY OF THE REACTIVE SITE AND OF THE PEPTIDE GROUPS IN TRYPSIN, TRYPSINOGEN AND ITS COMPLEXES WITH INHIBITORS

• PDB DOI: https://doi.org/10.2210/pdb2PTC/pdb
• Entry: 2PTC supersedes: 1PTC

• Classification: COMPLEX (PROTEINASE/INHIBITOR)
• Organism(s): Bos taurus
• Mutation(s): No 


• Deposited: 1982-09-27 Released: 1983-01-18 
• Deposition Author(s): Huber, R., Deisenhofer, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Work: 0.187 

Literature

The Geometry of the Reactive Site and of the Peptide Groups in Trypsin, Trypsinogen and its Complexes with Inhibitors

Marquart, M., Walter, J., Deisenhofer, J., Bode, W., Huber, R.

(1983) Acta Crystallogr B 39: 480

Biological Assembly 1  

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

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

Biological Assembly 2  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Hetero 8-mer - A4B4 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 29.89 kDa 
• Atom Count: 2,241 
• Modelled Residue Count: 281 
• Deposited Residue Count: 281 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
BETA-TRYPSIN	A [auth E]	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
TRYPSIN INHIBITOR	B [auth I]	58	Bos taurus	Mutation(s): 0
UniProt
Find proteins for P00974 (Bos taurus) Explore P00974  Go to UniProtKB:  P00974

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA	C [auth E]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Work: 0.187 
• Space Group: I 2 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 75.5	α = 90
b = 84.4	β = 90
c = 122.9	γ = 90

Structure Validation

Entry History 

Deposition Data

• Released Date: 1983-01-18 
Deposition Author(s): Huber, R., Deisenhofer, J.
• This entry supersedes: 1PTC

Revision History  

• Version 1.0: 1983-01-18
  Type: Initial release
  
• Version 1.1: 2008-03-25
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-06-05
  Changes: Data collection, Database references, Derived calculations, Other
• Version 1.4: 2024-10-30
  Changes: Structure summary