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Composition of the λ plasmid heritable replication complex

Potrykus, Katarzyna and Barańska, Sylwia and Węgrzyn, Alicja and Węgrzyn, Grzegorz (2002) Composition of the λ plasmid heritable replication complex. Biochemical Journal, 364 (3). pp. 857-862. ISSN 1042-0991

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Official URL: http://www.biochemj.org/content/364/3/857


Previous studies indicated during replication of plasmids derived from bacteriophage λ (the so-called λ plasmids), that, once assembled, replication complex can be inherited by one of the two daughter plasmid copies after each replication round, and may function in subsequent replication rounds. It seems that similar processes occur during replication of other DNA molecules, including chromosomes of the yeast Saccharomyces cerevisiae. However, apart from some suggestions based on genetic experiments, composition of the λ heritable replication complex remains unknown. In amino acid-starved Escherichia coli relA mutants, replication of λ plasmid DNA is carried out exclusively by the heritable replication complex as assembly of new complexes is impaired due to inhibition of protein synthesis. Here, using a procedure based on in vivo cross-linking, cell lysis, immunoprecipitation with specific sera, de-cross-linking and PCR analysis, we demonstrate that the λ heritable replication complex consists of O, P, DnaB and, perhaps surprisingly, DnaK proteins.

Item Type:Article
Subjects:Q Science > QH Natural history > QH301 Biology
Q Science > QH Natural history > QH426 Genetics
Q Science > QR Microbiology
Divisions:Laboratory of Molecular Biology (in Gdansk)
ID Code:922
Deposited By: PhD Piotr Golec
Deposited On:29 Sep 2015 12:46
Last Modified:29 Sep 2015 12:46

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