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Halobacterium halobium phage øH.

H Schnabel1, W Zillig, M Pfäffle

  • 1Max-Planck-Institut für Biochemie, 8033 Martinsried bei München, FRG.

The EMBO Journal
|January 1, 1982
PubMed
Summary
This summary is machine-generated.

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Researchers characterized phage øH, a novel virus infecting Halobacterium halobium. This study details its growth, DNA properties, and interaction with host DNA, revealing potential phage variants and a resistant host strain.

Area of Science:

  • Microbiology
  • Virology
  • Archaea Research

Background:

  • Halobacterium halobium is an archaeon with known phages.
  • Understanding phage-host interactions is crucial for microbial genetics.

Purpose of the Study:

  • To characterize a novel phage, øH, infecting Halobacterium halobium.
  • To investigate the genetic properties and replication cycle of phage øH.
  • To explore the interaction between phage øH DNA and Halobacterium halobium DNA.

Main Methods:

  • One-step growth curve analysis to determine phage replication parameters.
  • Molecular characterization of phage øH DNA, including size, structure, and GC content.
  • DNA homology studies using hybridization techniques.
  • Isolation and characterization of phage-resistant host strains.

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Main Results:

  • Phage øH exhibits a 5.5 h eclipse, 7 h latent period, and burst size of 170.
  • Phage øH DNA is linear, double-stranded, with a molecular weight of 39 x 10^6 Da and 65% GC content.
  • Partial homology was found between øH DNA and H. halobium DNA, particularly satellite DNA.
  • Evidence suggests phage variants with rearranged DNA and isolation of a phage-resistant H. halobium strain.

Conclusions:

  • Phage øH is a distinct virus of Halobacterium halobium with unique genomic features.
  • The study proposes a packaging model for øH DNA and highlights potential genomic variability.
  • A mechanism for phage resistance in H. halobium was identified, involving integrated phage DNA.