Rhizobium etli CFN42 contains at least three plasmids of the repABC family:: a structural and evolutionary analysis

被引:29
作者
Cevallos, MA
Porta, H
Izquierdo, J
Tun-Garrido, C
García-de-los-Santos, A
Dávila, G
Brom, S
机构
[1] Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Programa Evoluc Mol, Cuernavaca 62191, Morelos, Mexico
[2] Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Biol Mol Plantas, Cuernavaca 62191, Morelos, Mexico
[3] Univ Nacl Autonoma Mexico, Ctr Invest Fijac Nitrogeno, Programa Genet Mol Plasmidos Bacterianos, Cuernavaca 62191, Morelos, Mexico
关键词
repABC plasmid; plasmid evolution; Rhizobium etli; incompatibility;
D O I
10.1016/S0147-619X(02)00119-1
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
In this paper, we report the identification of replication/partition regions of plasmid p42a and p42b of Rhizobium etli CFN42. Sequence analysis reveals that both replication/partition regions belong to the repABC family. Phylogenetic analysis of all the complete repA BC replication/partition regions reported to date, shows that repABC plasmids coexisting in the same strain arose most likely by lateral transfer instead of by duplication followed by divergence. A model explaining how new incompatibility groups originate, is proposed. (C) 2002 Elsevier Science (USA). All rights reserved.
引用
收藏
页码:104 / 116
页数:13
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