Avirulence gene D of Pseudomonas syringae pv. tomato may have undergone horizontal gene transfer

FEBS Letters

Kobayashi, Donald¹  Hanekamp, Theodor¹  Hayes, Scott¹  Stayton, Mark M.¹ 

[1] Department of Molecular Biology, University of Wyoming, Laramie, WY 82071-3944, USA

关键词: Insertion sequence;    IS1240;    avrD;    Pseudomonas syringae pv. tomato;   

DOI  :  10.1016/S0014-5793(97)01089-2

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Avirulence gene D (avrD) is carried on the B-plasmid of the plant pathogen Pseudomonas syringae pv. tomato with plasmid-borne avrD homologs widely distributed among the Pseudomonads. We now report sequences in the soft rot pathogen Erwinia carotovora that cross-hybridize to avrD suggesting a conserved function beyond avirulence. Alternatively, avrD may have been transferred horizontally among species: (i) DNA linked to avrD shows evidence of class II transpositions and contains a novel IS3-related insertion sequence, and (ii) short sequences linked to avrD are similar to pathogenicity genes from a variety of unrelated pathogens. We have also identified the gene cluster that controls B-plasmid stability.

【 授权许可】

Unknown