pIT3, a cryptic plasmid isolated from the hyperthermophilic crenarchaeon Sulfolobus solfataricus IT3

Plasmid
Santina PratoSimonetta Bartolucci

Abstract

The plasmid pIT3 (4,967 bp) was isolated from the hyperthermophilic archaeon Sulfolobus solfataricus, strain IT3. The completely sequenced plasmid contains six open reading frames (ORFs), the largest (ORF915) spanning more than half of the plasmid and encoding a putative protein with significant similarity to the helicase domain of viral and plasmid primase proteins, as well as to the newly described archaeal primase-polymerase domain. A small ORF, (ORF80), located upstream of this putative polymerase, encodes a putative copy number control protein. Specific transcripts corresponding to the ORF80 and ORF915, were detected by Northern blot analyses, and their transcriptional start sites were determined by primer extension. Moreover, the transfer and the maintenance of the plasmid in other Sulfolobus strains were demonstrated to be effective and stable.

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Citations

Oct 3, 2013·Extremophiles : Life Under Extreme Conditions·Patrizia ContursiGabriella Fiorentino
Aug 1, 2006·Archaea : an International Microbiological Journal·Reidun K LillestølKim Brügger
Feb 25, 2014·Extremophiles : Life Under Extreme Conditions·Patrizia ContursiQunxin She
Feb 1, 2019·World Journal of Microbiology & Biotechnology·Martina AulittoPatrizia Contursi

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