1HEI

STRUCTURE OF THE HEPATITIS C VIRUS RNA HELICASE DOMAIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.320 
  • R-Value Work: 0.220 
  • R-Value Observed: 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 Biol 4: 463-467

  • DOI: 10.1038/nsb0697-463
  • Primary Citation of Related Structures:  
    1HEI

  • 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 molecule with distinct NTPase and RNA binding domains ...

    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: 
    • 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
    • Expression, Isolation, and Characterization of the Hepatitis C Virus ATPase/RNA Helicase
      Jin, L., Peterson, D.L.
      (1995) Arch Biochem Biophys 323: 47

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HCV HELICASEA, B451Hepatitis C virus (isolate 1)Mutation(s): 0 
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 P27958 (Hepatitis C virus genotype 1a (isolate H77))
Explore P27958 
Go to UniProtKB:  P27958
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download Ideal Coordinates CCD File 
C [auth A], D [auth B]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.320 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.220 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.54α = 90
b = 102.73β = 90
c = 119.5γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

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

Revision History  (Full details and data files)

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