tRNA genes were found in Piscirickettsia salmonis 16S-23S rDNA spacer region (ITS).

Abstract:

:Piscirickettsia salmonis is the etiological agent of Salmonid Rickettsial Septicemia, a disease affecting salmon aquaculture industry. We analyzed the 16S-23S rDNA spacer region (internal transcribed spacer, ITS) of Chilean P. salmonis isolates LF-89 and EM-90. Two main ITS amplification products were obtained by PCR using L1 and G1 primers, differing from that described where only one ITS region was found. By Southern blot, it was established that these two amplification products contained sequences related to P. salmonis ITS. Sequence analysis confirmed that P. salmonis had two ITS regions: ITS A and ITS B. In both isolates, the smaller (ITS B) corresponded to ITS sequences previously described for each one, and the larger (ITS A) were almost the same as their respective ITS B sequences interrupted by an insert which contained two tRNAs genes: tRNA-Ile and tRNA-Ala.

journal_name

FEMS Microbiol Lett

authors

Casanova A,Obreque J,Sandino AM,Jashés M

doi

10.1111/j.1574-6968.2001.tb10576.x

keywords:

subject

Has Abstract

pub_date

2001-04-01 00:00:00

pages

19-22

issue

1

eissn

0378-1097

issn

1574-6968

pii

S0378109701000295

journal_volume

197

pub_type

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