3TXS

Crystal Structure of phage 44RR small terminase gp16


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.81 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and function of the small terminase component of the DNA packaging machine in T4-like bacteriophages.

Sun, S.Gao, S.Kondabagil, K.Xiang, Y.Rossmann, M.G.Rao, V.B.

(2012) Proc.Natl.Acad.Sci.USA 109: 817-822

  • DOI: 10.1073/pnas.1110224109
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Tailed DNA bacteriophages assemble empty procapsids that are subsequently filled with the viral genome by means of a DNA packaging machine situated at a special fivefold vertex. The packaging machine consists of a "small terminase" and a "large termi ...

    Tailed DNA bacteriophages assemble empty procapsids that are subsequently filled with the viral genome by means of a DNA packaging machine situated at a special fivefold vertex. The packaging machine consists of a "small terminase" and a "large terminase" component. One of the functions of the small terminase is to initiate packaging of the viral genome, whereas the large terminase is responsible for the ATP-powered translocation of DNA. The small terminase subunit has three domains, an N-terminal DNA-binding domain, a central oligomerization domain, and a C-terminal domain for interacting with the large terminase. Here we report structures of the central domain in two different oligomerization states for a small terminase from the T4 family of phages. In addition, we report biochemical studies that establish the function for each of the small terminase domains. On the basis of the structural and biochemical information, we propose a model for DNA packaging initiation.


    Organizational Affiliation

    Department of Biological Sciences, Purdue University, 240 S. Martin Jischke Drive, West Lafayette, IN 47907-2032, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Terminase DNA packaging enzyme small subunit
A, B, C, D
94Aeromonas virus 44RR2Mutation(s): 0 
Gene Names: 16
Find proteins for Q6U9F0 (Aeromonas virus 44RR2)
Go to UniProtKB:  Q6U9F0
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.81 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.187 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 140.605α = 90.00
b = 140.605β = 90.00
c = 53.639γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data collection
PHASERphasing
HKL-2000data scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-12-28
    Type: Initial release
  • Version 1.1: 2012-01-25
    Type: Database references
  • Version 1.2: 2012-02-22
    Type: Database references