PMID: 11934489Apr 6, 2002Paper

A linear plasmid temperature-sensitive for replication in Streptomyces hygroscopicus 10-22

FEMS Microbiology Letters
Xiuhua PangZixin Deng

Abstract

Streptomyces hygroscopicus 10-22 harbors a conjugative, autonomously replicating linear plasmid pHZ6 of ca. 70 kb, which shows no obvious homology with chromosomal DNA and is temperature-sensitive for replication, being stable in the host at 28 degrees C but easily lost at 37 degrees C. On a lawn of the wild-type S. hygroscopicus 10-22 cured of pHZ6, pHZ6 elicit pocks. Temperature sensitivity seemed to be a unique property for pHZ6 among six linear plasmids tested, including the well-known linear plasmids SLP2 in Streptomyces lividans 1326 and SCP1 in Streptomyces coelicolor A3(2). The distinct identity of pHZ6 from previously identified pHZ1-pHZ5 was demonstrated by the profile of relevant plasmids in six well-defined strains originated from S. hygroscopicus 10-22.

References

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