Translator Disclaimer
1 March 2004 Identification of a Second rRNA Gene Unit in the Perkinsus andrewsi Genome
Author Affiliations +
Abstract

Perkinsus species are parasitic protozoa of mollusks, currently classified within the Perkinsozoa, a recently established phylum that is basal to the Apicomplexa and Dinozoa. Ribosomal RNA (rRNA) genes and their intergenic spacers have been used to support the taxonomy of Perkinsus species, the description of new species, and to develop molecular probes for their detection and identification. We previously described ultrastructure, behavior in culture, and partial sequence of the rRNA locus of a Perkinsus species isolated from the baltic clam Macoma balthica. The rRNA genes and intergenic spacers of this Perkinsus isolate differed from those described in the currently accepted species to a degree that led to its designation as a new species, Perkinsus andrewsi. In this study, we identify an additional rRNA gene unit (rRNA-B) in the P. andrewsi holotype, and report the complete sequences of both rRNA gene units. Except for the 5.8S, all regions of the rRNA-B gene unit exhibited sequence differences from that initially described (rRNA-A). Each rRNA gene unit is arranged in a “head-to-tail” tandem repeat. This is the first report demonstrating two distinct rRNA units in a Perkinsus species.

WOLF T. PECHER, JOSÉ A. F. ROBLEDO, and GERARDO R. VASTA "Identification of a Second rRNA Gene Unit in the Perkinsus andrewsi Genome," The Journal of Eukaryotic Microbiology 51(2), 234-245, (1 March 2004). https://doi.org/10.1111/j.1550-7408.2004.tb00553.x
Received: 27 June 2003; Accepted: 9 December 2003; Published: 1 March 2004
JOURNAL ARTICLE
12 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top