Phage T4: Difference between revisions

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==== DNA replication ====
==== DNA replication ====
T4 replisomes have been intensely studied, and work from the Alberts lab led to the "trombone model" for coupling of leading and lagging strand progression.  High resolution structures for part or all of several replisome proteins have been determined (reviewed by Mueser et al. <ref name='PMID: 21129204'/>)


==== Late gene expression ====
==== Late gene expression ====

Revision as of 04:19, 30 May 2011

Bacteriophage T4 is a member of the ICTV family myoviridae, long-tailed viruses with contractile tails. T4 is the namesake of the T4-like virus genus. T4 and its relatives were used for many of the key experiments in the history of molecular biology.

Morphology

Genome Organization

T4 has a circular genetic map[1], but the T4 genome is physically packaged as linear dsDNA. Headful packaging incorporates DNA that is circularly permuted[2] and terminally redundant[3] with respect to the genetic map.

Life cycle

Lytic cycle

Adsorbtion and Injection

Early gene expression

Middle gene expression

DNA replication

T4 replisomes have been intensely studied, and work from the Alberts lab led to the "trombone model" for coupling of leading and lagging strand progression. High resolution structures for part or all of several replisome proteins have been determined (reviewed by Mueser et al. [4])

Late gene expression

Packaging

Lysis

See also

References

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  1. ↑ STREISINGER, G et al. (1964) CHROMOSOME STRUCTURE IN PHAGE T4. I. CIRCULARITY OF THE LINKAGE MAP. Proc. Natl. Acad. Sci. U.S.A. 51 775-9 PubMed
  2. ↑ THOMAS, CA Jr & RUBENSTEIN, I (1964) THE ARRANGEMENTS OF NUCLEOTIDE SEQUENCES IN T2 AND T5 BACTERIOPHAGE DNA MOLECULES. Biophys. J. 4 93-106 PubMed
  3. ↑ Séchaud, J et al. (1965) Chromosome structure in phage T4, II. Terminal redundancy and heterozygosis. Proc. Natl. Acad. Sci. U.S.A. 54 1333-9 PubMed
  4. ↑ Mueser, TC et al. (2010) Structural analysis of bacteriophage T4 DNA replication: a review in the Virology Journal series on bacteriophage T4 and its relatives. Virol. J. 7 359 PubMed