Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 35795.77 
• Atom Count: 2473 
• Residue Count: 305 
• Unique protein chains: 3

1AFE

HUMAN ALPHA-THROMBIN INHIBITION BY CBZ-PRO-AZALYS-ONP

• DOI: 10.2210/pdb1AFE/pdb

• Classification: HYDROLASE/HYDROLASE INHIBITOR
• Organism(s): Homo sapiens, Hirudo medicinalis


• Deposited: 1997-03-06 Released: 1997-12-03 
• Deposition Author(s): De Simone, G., Balliano, G., Milla, P., Gallina, C., Giordano, C., Tarricone, C., Rizzi, M., Bolognesi, M., Ascenzi, P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å

Literature

Human alpha-thrombin inhibition by the highly selective compounds N-ethoxycarbonyl-D-Phe-Pro-alpha-azaLys p-nitrophenyl ester and N-carbobenzoxy-Pro-alpha-azaLys p-nitrophenyl ester: a kinetic, thermodynamic and X-ray crystallographic study.

De Simone, G., Balliano, G., Milla, P., Gallina, C., Giordano, C., Tarricone, C., Rizzi, M., Bolognesi, M., Ascenzi, P.

(1997) J.Mol.Biol. 269: 558-569

• PubMed: 9217260 
• DOI: 10.1006/jmbi.1997.1037
• Primary Citation of Related Structures:  
  1AE8


• PubMed Abstract: 
  

Kinetics, thermodynamics and structural aspects of human alpha-thrombin (thrombin) inhibition by newly synthesized low molecular weight derivatives of alpha-azalysine have been investigated. The thrombin catalyzed hydrolysis of N-ethoxycarbonyl-D-Phe-Pro-alpha-azaLys p-nitrophenyl ester (Eoc-D-Phe-Pro-azaLys-ONp) and N-carbobenzoxy-Pro-alpha-azaLys p-nitrophenyl ester (Cbz-Pro-azaLys-ONp) was investigated at pH 6.2 and 21.0 degrees C, and analyzed in parallel with that of N-alpha-(N,N-dimethylcarbamoyl)-alpha-azalysine p-nitrophenyl ester (Dmc-azaLys-ONp). Decarboxylation following the enzymatic hydrolysis of these p-nitrophenyl esters gave the corresponding 1-peptidyl-2(4-aminobutyl) hydrazines (peptidyl-Abh) showing properties of thrombin competitive inhibitors. Therefore, thermodynamics for the reversible binding of D-Phe-Pro-Abh, Cbz-Pro-Abh and Dmc-Abh to thrombin was examined. These results are consistent with the minimum four-step catalytic mechanism for product inhibition of serine proteinases. Eoc-D-Phe-Pro-azaLys-ONp and Eoc-D-Phe-Pro-Abh display a sub-micromolar affinity for thrombin together with a high selectivity versus homologous plasmatic and pancreatic serine proteinases acting on cationic substrates. The three-dimensional structures of the reversible non-covalent thrombin:Eoc-D-Phe-Pro-Abh and thrombin:Cbz-Pro-Abh complexes have been determined by X-ray crystallography at 2.0 A resolution (R-factor = 0.169 and 0.179, respectively), and analyzed in parallel with that of the thrombin:Dmc-azaLys acyl-enzyme adduct. Both Eoc-D-Phe-Pro-Abh and Cbz-Pro-Abh competitive inhibitors are accommodated in the thrombin active center, spanning the region between the aryl binding site and the S1 primary specificity subsite.

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Organizational Affiliation: 

Department of Chemistry, University of Napoli, Italy.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
ALPHA-THROMBIN (SMALL SUBUNIT)	L	36	Homo sapiens	Mutation(s): 0  Gene Names: F2 EC: 3.4.21.5
Find proteins for P00734 (Homo sapiens) Go to Gene View: F2 Go to UniProtKB:  P00734

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
ALPHA-THROMBIN (LARGE SUBUNIT)	H	259	Homo sapiens	Mutation(s): 0  Gene Names: F2 EC: 3.4.21.5
Find proteins for P00734 (Homo sapiens) Go to Gene View: F2 Go to UniProtKB:  P00734

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
HIRUGEN	I	10	Hirudo medicinalis	Mutation(s): 0
Find proteins for P01050 (Hirudo medicinalis) Go to UniProtKB:  P01050

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ALZ	H	2-[N'-(4-AMINO-BUTYL)-HYDRAZINOCARBONYL]-PYRROLIDINE-1-CARBOXYLIC ACID BENZYL ESTER C17 H26 N4 O3 MOCIXHUQBOUBAK-HNNXBMFYSA-N
NAG	H	N-ACETYL-D-GLUCOSAMINE C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
TYS	I	L-PEPTIDE LINKING	C9 H11 N O6 S		TYR

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• Space Group: C 1 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 71.130	α = 90.00
b = 72.610	β = 99.66
c = 72.650	γ = 90.00

Software Package:

Software Name	Purpose
TNT	refinement
CCP4	model building
CCP4	data scaling
CCP4	phasing
ROTAVATA)	data scaling
MOSFLM	data reduction
ROTAVATA-AGROVATA	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-03-06 
• Released Date: 1997-12-03 
• Deposition Author(s): De Simone, G., Balliano, G., Milla, P., Gallina, C., Giordano, C., Tarricone, C., Rizzi, M., Bolognesi, M., Ascenzi, P.

Revision History 

• Version 1.0: 1997-12-03
  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: 2012-04-11
  Type: Non-polymer description