Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

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

Macromolecule Content

• Total Structure Weight: 24440.56 
• Atom Count: 1702 
• Residue Count: 231 
• Unique protein chains: 2

1TPS

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

• DOI: 10.2210/pdb1TPS/pdb

• Classification: HYDROLASE/HYDROLASE INHIBITOR
• Organism(s): Bos taurus


• 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: 1.9 Å
• R-Value Free: 0.197 
• R-Value Work: 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 


• 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.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
TRYPSIN	A	223	Bos taurus	Mutation(s): 0  EC: 3.4.21.4
Find proteins for P00760 (Bos taurus) Go to UniProtKB:  P00760

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
INHIBITOR A90720A	B	8	N/A	Mutation(s): 0
Protein Feature View is not available: No corresponding UniProt sequence found.

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
CA	A	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Modified Residues  3 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
YNM	B	L-PEPTIDE LINKING	C10 H13 N O3		--
OSL	B	NON-POLYMER	C3 H6 O7 S		--
DLE	B	D-PEPTIDE LINKING	C6 H13 N O2		--

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
A9A	IC50: 10 nM PDBBIND

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å
• R-Value Free: 0.197 
• R-Value Work: 0.162 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 63.740	α = 90.00
b = 63.550	β = 90.00
c = 69.100	γ = 90.00

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1994-09-04 
• 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
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
• Version 1.3: 2011-08-10
  Type: Derived calculations