3CSR

Crystal and cryoEM structural studies of a cell wall degrading enzyme in the bacteriophage phi29 tail

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 

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Literature

Crystal and cryoEM structural studies of a cell wall degrading enzyme in the bacteriophage phi29 tail.

Xiang, Y., Morais, M.C., Cohen, D.N., Bowman, V.D., Anderson, D.L., Rossmann, M.G.

(2008) Proc Natl Acad Sci U S A 105: 9552-9557

  • DOI: 10.1073/pnas.0803787105
  • Primary Citation of Related Structures:  
    3CT5, 3CSZ, 3CT0, 3CT1, 3CSQ, 3CSR

  • PubMed Abstract: 

    • The small bacteriophage phi29 must penetrate the approximately 250-A thick external peptidoglycan cell wall and cell membrane of the Gram-positive Bacillus subtilis, before ejecting its dsDNA genome through its tail into the bacterial cytoplasm. The tail of bacteriophage phi29 is noncontractile and approximately 380 A long ...

    The small bacteriophage phi29 must penetrate the approximately 250-A thick external peptidoglycan cell wall and cell membrane of the Gram-positive Bacillus subtilis, before ejecting its dsDNA genome through its tail into the bacterial cytoplasm. The tail of bacteriophage phi29 is noncontractile and approximately 380 A long. A 1.8-A resolution crystal structure of gene product 13 (gp13) shows that this tail protein has spatially well separated N- and C-terminal domains, whose structures resemble lysozyme-like enzymes and metallo-endopeptidases, respectively. CryoEM reconstructions of the WT bacteriophage and mutant bacteriophages missing some or most of gp13 shows that this enzyme is located at the distal end of the phi29 tail knob. This finding suggests that gp13 functions as a tail-associated, peptidoglycan-degrading enzyme able to cleave both the polysaccharide backbone and peptide cross-links of the peptidoglycan cell wall. Comparisons of the gp13(-) mutants with the phi29 mature and emptied phage structures suggest the sequence of events that occur during the penetration of the tail through the peptidoglycan layer.

    Organizational Affiliation: 

    Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Morphogenesis protein 1 A159N/AMutation(s): 0 
Gene Names: 13
Find proteins for P15132 (Bacillus phage phi29)
Explore P15132 
Go to UniProtKB:  P15132
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 30.906α = 90
b = 69.506β = 90
c = 71.255γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
CrystalCleardata collection
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-07-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance