Plant DNA Repair and Agrobacterium T-DNA Integration.
Int J Mol Sci
; 22(16)2021 Aug 06.
Article
em En
| MEDLINE
| ID: mdl-34445162
ABSTRACT
Agrobacterium species transfer DNA (T-DNA) to plant cells where it may integrate into plant chromosomes. The process of integration is thought to involve invasion and ligation of T-DNA, or its copying, into nicks or breaks in the host genome. Integrated T-DNA often contains, at its junctions with plant DNA, deletions of T-DNA or plant DNA, filler DNA, and/or microhomology between T-DNA and plant DNA pre-integration sites. T-DNA integration is also often associated with major plant genome rearrangements, including inversions and translocations. These characteristics are similar to those often found after repair of DNA breaks, and thus DNA repair mechanisms have frequently been invoked to explain the mechanism of T-DNA integration. However, the involvement of specific plant DNA repair proteins and Agrobacterium proteins in integration remains controversial, with numerous contradictory results reported in the literature. In this review I discuss this literature and comment on many of these studies. I conclude that either multiple known DNA repair pathways can be used for integration, or that some yet unknown pathway must exist to facilitate T-DNA integration into the plant genome.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Plantas
/
DNA Bacteriano
/
DNA de Plantas
/
Reparo do DNA
/
Agrobacterium
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article