1HEI

STRUCTURE OF THE HEPATITIS C VIRUS RNA HELICASE DOMAIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.320 
  • R-Value Work: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the hepatitis C virus RNA helicase domain.

Yao, N.Hesson, T.Cable, M.Hong, Z.Kwong, A.D.Le, H.V.Weber, P.C.

(1997) Nat.Struct.Mol.Biol. 4: 463-467


  • PubMed Abstract: 
  • Helicases are nucleotide triphosphate (NTP)-dependent enzymes responsible for unwinding duplex DNA and RNA during genomic replication. The 2.1 A resolution structure of the HCV helicase from the positive-stranded RNA hepatitis C virus reveals a molec ...

    Helicases are nucleotide triphosphate (NTP)-dependent enzymes responsible for unwinding duplex DNA and RNA during genomic replication. The 2.1 A resolution structure of the HCV helicase from the positive-stranded RNA hepatitis C virus reveals a molecule with distinct NTPase and RNA binding domains. The structure supports a mechanism of helicase activity involving initial recognition of the requisite 3' single-stranded region on the nucleic acid substrate by a conserved arginine-rich sequence on the RNA binding domain. Comparison of crystallographically independent molecules shows that rotation of the RNA binding domain involves conformational changes within a conserved TATPP sequence and untwisting of an extended antiparallel beta-sheet. Location of the TATPP sequence at the end of an NTPase domain beta-strand structurally homologous to the 'switch region' of many NTP-dependent enzymes offers the possibility that domain rotation is coupled to NTP hydrolysis in the helicase catalytic cycle.


    Related Citations: 
    • Expression, Isolation, and Characterization of the Hepatitis C Virus ATPase/RNA Helicase
      Jin, L.,Peterson, D.L.
      (1995) Arch.Biochem.Biophys. 323: 47
    • The Qrxgrxgrxxxg Motif of the Vaccinia Virus Dexh Box RNA Helicase Nph-II is Required for ATP Hydrolysis and RNA Unwinding But not for RNA Binding
      Gross, C.H.,Shuman, S.
      (1996) J.Virol. 70: 1706


    Organizational Affiliation

    Structural Chemistry and Virology Department, Schering-Plough Research Institute, Kensworth, New Jersey 07033, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HCV HELICASE
A, B
451Hepatitis C virus genotype 1aMutation(s): 0 
Find proteins for P27958 (Hepatitis C virus genotype 1a)
Go to UniProtKB:  P27958
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.320 
  • R-Value Work: 0.220 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 81.540α = 90.00
b = 102.730β = 90.00
c = 119.500γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORrefinement
SCALEPACKdata scaling
DENZOdata reduction
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1997-03-31 
  • Released Date: 1998-10-07 
  • Deposition Author(s): Yao, N., Weber, P.

Revision History 

  • Version 1.0: 1998-10-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance