Analysis of mutations in the ninR region of bacteriophage lambda that bypass a requirement for lambda N antitermination.

Abstract:

:Two mutations in the ninR region of bacteriophage lambda that bypass a requirement for antitermination have been studied. One mutation, byp, has been cloned and mapped by marker rescue to a 417-base-pair segment in the ninR region of the genome. Analysis of the byp mutation by using promoter detection vectors, DNA sequencing, and S1 nuclease analysis showed that the byp mutation created a new promoter that transcribed gene Q. The second mutation analyzed was the deletion nin3. Sequence analysis revealed that 2,485 base pairs of the ninR region were removed, beginning within the ren gene and ending in an open reading frame termed ninG. The tR2 and tR3 terminators, and probably others, were removed by the nin3 deletion, thereby allowing the phage to be N independent and to grow in hosts defective for Nus antitermination factors.

journal_name

J Bacteriol

journal_title

Journal of bacteriology

authors

Costantino N,Zuber M,Court D

doi

10.1128/jb.172.8.4610-4615.1990

subject

Has Abstract

pub_date

1990-08-01 00:00:00

pages

4610-5

issue

8

eissn

0021-9193

issn

1098-5530

journal_volume

172

pub_type

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