Preliminary Characterization of El Tor Vibriophage M4.

Abstract:

AIMS:The aim of the present study is the preliminary characterization of an El Tor vibriophage M4 (ATCC 51352-B4). METHODS:We studied the growth characteristics and sustainability of this phage under various stresses like temperature, pH, and UV. The phage morphology and phage genome were also examined using electron microscopy. RESULTS:Sustainability studies showed that the phage is more stable in acidic conditions, which is very uncommon among vibriophages. Studies also showed that M4 is a thermostable phage and it is inactivated by temperatures above 60°C but, like other phages, UV has a high inactivating effect on it. Morphological and genomic studies by electron microscopy showed that this phage has a long contractile tail and a big head. The genome is linear and about 120 kb in length. The genome also has a high packaging density as the value of Vm (the volume occupied per Da of biological macromolecule) is low for this phage. The phage-bacterial interaction was studied by negative staining as well as ultrathin sectioning methods. CONCLUSIONS:M4 belongs to the Myoviridae family and it is generally thermostable. It is prone to destruction by alkali and UV. It also has a large DNA which is densely packed inside of a big capsid.

journal_name

Intervirology

journal_title

Intervirology

authors

Das S,Ghosh AN

doi

10.1159/000485835

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

149-155

issue

4

eissn

0300-5526

issn

1423-0100

pii

000485835

journal_volume

60

pub_type

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