In:
Applied and Environmental Microbiology, American Society for Microbiology, Vol. 72, No. 9 ( 2006-09), p. 5728-5733
Abstract:
Streptomyces sp. linear plasmids and linear chromosomes usually contain
conserved terminal palindromic sequences bound by the conserved telomeric proteins Tap and Tp, encoded by the tap and tpg genes, respectively, as well as plasmid loci required for
DNA replication in circular mode when the telomeres are deleted. These consist of iterons and an adjacent rep gene. By using PCR, we found that 8 of 17 newly detected linear plasmids in Streptomyces strains lack typical telomeric tap and tpg sequences. Instead, two novel telomeres in plasmids pRL1
and pRL2 from the eight strains and one conserved telomere in pFRL1 from the other strains were identified, while multiple short
palindromes were also found in the plasmids. The complete nucleotide sequence of pRL2 revealed a gene encoding a protein containing two
domains, resembling Tap of Streptomyces and a helicase of Thiobacillus , and an adjacent gene encoding a protein similar
to Tpg of Streptomyces and a portion of the telomere terminal
protein pTP of adenoviruses. No typical iterons- rep loci were
found in the three plasmids. These results indicate an unexpected diversity of telomere palindromic sequences and replication genes among Streptomyces linear
plasmids.
Type of Medium:
Online Resource
ISSN:
0099-2240
,
1098-5336
DOI:
10.1128/AEM.00707-06
Language:
English
Publisher:
American Society for Microbiology
Publication Date:
2006
detail.hit.zdb_id:
223011-2
detail.hit.zdb_id:
1478346-0
SSG:
12
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