Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Biological Assembly 3  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 assigned by authors.

Macromolecule Content

• Total Structure Weight: 59.88 kDa 
• Atom Count: 534 
• Modelled Residue Count: 531 
• Deposited Residue Count: 567 
• Unique protein chains: 1

1A1Q

HEPATITIS C VIRUS NS3 PROTEINASE

• PDB DOI: 10.2210/pdb1A1Q/pdb

• Classification: HYDROLASE
• Organism(s): Hepacivirus C
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1997-12-12 Released: 1998-03-25 
• Deposition Author(s): Love, R.A., Parge, H.E., Wickersham, J.A., Hostomsky, Z., Habuka, N., Moomaw, E.W., Adachi, T., Hostomska, Z.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.320 
• R-Value Work: 0.225 
• R-Value Observed: 0.225 

Literature

The crystal structure of hepatitis C virus NS3 proteinase reveals a trypsin-like fold and a structural zinc binding site.

Love, R.A., Parge, H.E., Wickersham, J.A., Hostomsky, Z., Habuka, N., Moomaw, E.W., Adachi, T., Hostomska, Z.

(1996) Cell 87: 331-342

• PubMed: 8861916 
• DOI: 10.1016/s0092-8674(00)81350-1
• Primary Citation of Related Structures:  
  1A1Q


• PubMed Abstract: 
  

During replication of hepatitis C virus (HCV), the final steps of polyprotein processing are performed by a viral proteinase located in the N-terminal one-third of nonstructural protein 3. The structure of NS3 proteinase from HCV BK strain was determined by X-ray crystallography at 2.4 angstrom resolution. NS3P folds as a trypsin-like proteinase with two beta barrels and a catalytic triad of His-57, Asp-81, Ser-139. The structure has a substrate-binding site consistent with the cleavage specificity of the enzyme. Novel features include a structural zinc-binding site and a long N-terminus that interacts with neighboring molecules by binding to a hydrophobic surface patch.

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Organizational Affiliation: 

Agouron Pharmaceuticals, Inc., San Diego, California 92121, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
NS3 PROTEINASE	A, B, C	189	Hepacivirus C	Mutation(s): 0  Gene Names: CDNA EC: 3.4.22 (UniProt), 3.4.21.98 (UniProt), 3.6.1.15 (UniProt), 3.6.4.13 (UniProt), 2.7.7.48 (UniProt)
UniProt
Find proteins for P26663 (Hepatitis C virus genotype 1b (isolate BK)) Explore P26663  Go to UniProtKB:  P26663

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	D [auth A], E [auth B], F [auth C]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.320 
• R-Value Work: 0.225 
• R-Value Observed: 0.225 
• Space Group: H 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 133	α = 90
b = 133	β = 90
c = 223	γ = 120

Software Package:

Software Name	Purpose
PHASES	phasing
X-PLOR	model building
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-12-12 
• Released Date: 1998-03-25 
Deposition Author(s): Love, R.A., Parge, H.E., Wickersham, J.A., Hostomsky, Z., Habuka, N., Moomaw, E.W., Adachi, T., Hostomska, Z.

Revision History  

• Version 1.0: 1998-03-25
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance