Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 23927.79 
• Atom Count: 1707 
• Residue Count: 223 
• Unique protein chains: 1

2AH4

guanidinobenzoyl-trypsin acyl-enzyme at 1.13 A resolution

• DOI: 10.2210/pdb2AH4/pdb

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


• Deposited: 2005-07-26 Released: 2006-05-16 
• Deposition Author(s): Radisky, E.S., Lee, J.M., Lu, C.J., Koshland Jr., D.E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.13 Å
• R-Value Free: 0.146 
• R-Value Work: 0.119 

Literature

Insights into the serine protease mechanism from atomic resolution structures of trypsin reaction intermediates

Radisky, E.S., Lee, J.M., Lu, C.J., Koshland Jr., D.E.

(2006) Proc.Natl.Acad.Sci.USA 103: 6835-6840

• PubMed: 16636277 
• DOI: 10.1073/pnas.0601910103
• Primary Citation of Related Structures:  
  2AGI, 2AGG, 2AGE


• PubMed Abstract: 
  

Atomic resolution structures of trypsin acyl-enzymes and a tetrahedral intermediate analog, along with previously solved structures representing the Michaelis complex, are used to reconstruct events in the catalytic cycle of this classic serine protease. Structural comparisons provide insight into active site adjustments involved in catalysis. Subtle motions of the catalytic serine and histidine residues coordinated with translation of the substrate reaction center are seen to favor the forward progress of the acylation reaction. The structures also clarify the attack trajectory of the hydrolytic water in the deacylation reaction.

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Organizational Affiliation: 

Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

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

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SO4	X	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
CA	X	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N
GBS	X	4-GUANIDINOBENZOIC ACID C8 H9 N3 O2 SXTSBZBQQRIYCU-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.13 Å
• R-Value Free: 0.146 
• R-Value Work: 0.119 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 54.446	α = 90.00
b = 57.908	β = 90.00
c = 66.771	γ = 90.00

Software Package:

Software Name	Purpose
SCALA	data scaling
MOSFLM	data reduction
REFMAC	refinement
EPMR	phasing
TRUNCATE	data scaling
TRUNCATE	data reduction
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-07-26 
• Released Date: 2006-05-16 
• Deposition Author(s): Radisky, E.S., Lee, J.M., Lu, C.J., Koshland Jr., D.E.

Revision History 

• Version 1.0: 2006-05-16
  Type: Initial release
• Version 1.1: 2008-04-01
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-10-11
  Type: Refinement description