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Comparative genomics of the late gene cluster from Lactobacillus phages.

Abstract：

:Three prophage sequences were identified in the Lactobacillus johnsoni strain NCC533. Prophage Lj965 predicted a gene map very similar to those of pac-site Streptococcus thermophilus phages over its DNA packaging and head and tail morphogenesis modules. Sequence similarity linked the putative DNA packaging and head morphogenesis genes at the protein level. Prophage Lj965/S. thermophilus phage Sfi11/Lactococcus lactis phage TP901-1 on one hand and Lactobacillus delbrueckii phage LL-H/Lactobacillus plantarum phage phig1e/Listeria monocytogenes phage A118 on the other hand defined two sublines of structural gene clusters in pac-site Siphoviridae from low-GC Gram-positive bacteria. Bacillus subtilis phage SPP1 linked both sublines. The putative major head and tail proteins from Lj965 shared weak sequence similarity with phages from Gram-negative bacteria. A clearly independent line of structural genes in Siphoviridae from low-GC Gram-positive bacteria is defined by temperate cos-site phages including Lactobacillus gasseri phage adh, which also shared sequence similarity with phage D3 infecting a Gram-negative bacterium. A phylogenetic tree analysis demonstrated that the ClpP-like protein identified in four cos-site Siphoviridae from Lactobacillus, Lactococcus, Streptococcus, and Pseudomonas showed graded sequence relationships. The tree suggested that the ClpP-like proteins from the phages were not acquired by horizontal gene transfer from their corresponding bacterial hosts.

journal_name

Virology

journal_title

Virology

authors

Desiere F,Pridmore RD,Brüssow H

doi

10.1006/viro.2000.0498

subject

Has Abstract

pub_date

2000-09-30 00:00:00

pages

294-305

issue

2

eissn

0042-6822

issn

1096-0341

pii

S0042-6822(00)90498-7

journal_volume

275

pub_type

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