1TPS

ATOMIC STRUCTURE OF THE TRYPSIN-A90720A COMPLEX: A UNIFIED APPROACH TO STRUCTURE AND FUNCTION

• PDB DOI: https://doi.org/10.2210/pdb1TPS/pdb

• Classification: HYDROLASE/HYDROLASE INHIBITOR
• Organism(s): Bos taurus, Cyanobacteriota
• Mutation(s): No 


• Deposited: 1994-09-04 Released: 1995-01-26 
• Deposition Author(s): Lee, A.Y., Clardy, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.197 
• R-Value Work: 0.162 
• R-Value Observed: 0.162 

Literature

Atomic structure of the trypsin-A90720A complex: a unified approach to structure and function.

Lee, A.Y., Smitka, T.A., Bonjouklian, R., Clardy, J.

(1994) Chem Biol 1: 113-117

• PubMed: 9383379 
• DOI: https://doi.org/10.1016/1074-5521(94)90049-3
• Primary Citation of Related Structures:  
  1TPS


• PubMed Abstract: 
  

  A90720A is a potent serine proteinase inhibitor produced by the terrestrial blue-green alga Microchaete loktakensis. Most of its structure has been defined by spectroscopic and degradative studies, but the configurations of several stereochemical centers are unknown, and its mode of inhibition of serine proteinases is not understood. We therefore examined the structure of the compound in a complex with trypsin.

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Organizational Affiliation: 

Department of Chemistry, Baker Laboratory, Cornell University, Ithaca, NY 14853-1301, USA.

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 24.44 kDa 
• Atom Count: 1,870 
• Modelled Residue Count: 231 
• Deposited Residue Count: 231 
• Unique protein chains: 2

Macromolecules

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

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
INHIBITOR A90720A	B	8	Cyanobacteriota	Mutation(s): 0

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.197 
• R-Value Work: 0.162 
• R-Value Observed: 0.162 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 63.74	α = 90
b = 63.55	β = 90
c = 69.1	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1995-01-26 
Deposition Author(s): Lee, A.Y., Clardy, J.

Revision History  

• Version 1.0: 1995-01-26
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
• Version 1.3: 2011-08-10
  Changes: Derived calculations