当前位置： SCI文献检索 > PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA期刊下所有文献 > Virulence genes A, G, and D mediate the double-stranded border cleavage of T-DNA from the Agrobacterium Ti plasmid.

Virulence genes A, G, and D mediate the double-stranded border cleavage of T-DNA from the Agrobacterium Ti plasmid.

Abstract：

:Agrobacterium tumefaciens transfers the T-DNA portion of its Ti plasmid to the nuclear genome of plant cells. Upon cocultivation of A. tumefaciens strain A348 with regenerating tobacco leaf protoplasts, restriction endonuclease fragments of the T-DNA were generated that are consistent with double-stranded cleavage of the T-DNA at the border sequences. The T-DNA border cleavage was also induced by acetosyringone, a compound that induces many of the virulence genes. T-DNA cleavage did not occur in Agrobacterium strains harboring Tn3-HoHo1 insertions in the virA, -D, or -G genes. Insertion mutations in virB, -C, or -E did not have any effect on the T-DNA cleavage. Complementation of the mutations in virA, -D, or -G with cosmids containing the respective wild-type genes restored the T-DNA cleavage. Since virA and -G are essential in regulating the expression of other vir genes in response to plant signal molecules, the virD gene product(s) appear to mediate double-stranded T-DNA border cleavage.

journal_name

Proc Natl Acad Sci U S A

journal_title

Proceedings of the National Academy of Sciences of the United States of America

authors

Veluthambi K,Jayaswal RK,Gelvin SB

doi

10.1073/pnas.84.7.1881

subject

Has Abstract

pub_date

1987-04-01 00:00:00

pages

1881-5

issue

7

eissn

0027-8424

issn

1091-6490

journal_volume

84

pub_type

杂志文章

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