1JMU

Crystal Structure of the Reovirus mu1/sigma3 Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the reovirus membrane-penetration protein, Mu1, in a complex with is protector protein, Sigma3.

Liemann, S.Chandran, K.Baker, T.S.Nibert, M.L.Harrison, S.C.

(2002) Cell 108: 283-295


  • PubMed Abstract: 
  • Cell entry by nonenveloped animal viruses requires membrane penetration without membrane fusion. The reovirus penetration agent is the outer-capsid protein, Mu1. The structure of Mu1, complexed with its "protector" protein, Sigma3, and the fit of thi ...

    Cell entry by nonenveloped animal viruses requires membrane penetration without membrane fusion. The reovirus penetration agent is the outer-capsid protein, Mu1. The structure of Mu1, complexed with its "protector" protein, Sigma3, and the fit of this Mu1(3)Sigma3(3) heterohexameric complex into the cryoEM image of an intact virion, reveal molecular events essential for viral penetration. Autolytic cleavage divides Mu1 into myristoylated Mu1N and Mu1C. A long hydrophobic pocket can receive the myristoyl group. Dissociation of Mu1N, linked to a major conformational change of the entire Mu1 trimer, must precede myristoyl-group insertion into the cellular membrane. A myristoyl switch, coupling exposure of the fatty acid chain, autolytic cleavage of Mu1N, and long-range molecular rearrangement of Mu1C, thus appears to be part of the penetration mechanism.


    Organizational Affiliation

    Howard Hughes Medical Institute, Children's Hospital, Harvard Medical School, 320 Longwood Avenue, Boston, MA 02115, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN MU-1
A, C, E
41Reovirus type 1 (strain Lang)Gene Names: M2
Find proteins for P11077 (Reovirus type 1 (strain Lang))
Go to UniProtKB:  P11077
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PROTEIN MU-1
B, D, F
666Reovirus type 1 (strain Lang)Gene Names: M2
Find proteins for P11077 (Reovirus type 1 (strain Lang))
Go to UniProtKB:  P11077
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
SIGMA 3 PROTEIN
G, H, I
366Reovirus type 1 (strain Lang)Gene Names: S4
Find proteins for P07939 (Reovirus type 1 (strain Lang))
Go to UniProtKB:  P07939
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
G, H, I
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
B, D, F, G, H, I
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
BOG
Query on BOG

Download SDF File 
Download CCD File 
B, D, F
B-OCTYLGLUCOSIDE
C14 H28 O6
HEGSGKPQLMEBJL-RKQHYHRCSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
ACE
Query on ACE
G, H, I
NON-POLYMERC2 H4 O

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.216 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 180.294α = 90.00
b = 184.942β = 90.00
c = 284.324γ = 90.00
Software Package:
Software NamePurpose
MLPHAREphasing
DENZOdata reduction
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-02-06
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance