Integrating vectors for genetic studies in the rare Actinomycete Amycolatopsis marina

TY - JOUR

T1 - Integrating vectors for genetic studies in the rare Actinomycete Amycolatopsis marina

AU - Gao, Hong

AU - Murugesan, Buvani

AU - Hoßbach, Janina

AU - Evans, Stephanie K.

AU - Stark, W. Marshall

AU - Smith, Margaret C.M.

N1 - © The Author(s). 2019

PY - 2019/6/4

Y1 - 2019/6/4

N2 - Background: Few natural product pathways from rare Actinomycetes have been studied due to the difficulty in applying molecular approaches in these genetically intractable organisms. In this study, we sought to identify more integrating vectors, using phage int/attP loci, that would efficiently integrate site-specifically in the rare Actinomycete, Amycolatopsis marina DSM45569. Results: Analysis of the genome of A. marina DSM45569 indicated the presence of attB-like sequences for TG1 and R4 integrases. The TG1 and R4 attBs were active in in vitro recombination assays with their cognate purified integrases and attP loci. Integrating vectors containing either the TG1 or R4 int/attP loci yielded exconjugants in conjugation assays from Escherichia coli to A. marina DSM45569. Site-specific recombination of the plasmids into the host TG1 or R4 attB sites was confirmed by sequencing. Conclusions: The homologous TG1 and R4 attB sites within the genus Amycolatopsis have been identified. The results indicate that vectors based on TG1 and R4 integrases could be widely applicable in this genus.

AB - Background: Few natural product pathways from rare Actinomycetes have been studied due to the difficulty in applying molecular approaches in these genetically intractable organisms. In this study, we sought to identify more integrating vectors, using phage int/attP loci, that would efficiently integrate site-specifically in the rare Actinomycete, Amycolatopsis marina DSM45569. Results: Analysis of the genome of A. marina DSM45569 indicated the presence of attB-like sequences for TG1 and R4 integrases. The TG1 and R4 attBs were active in in vitro recombination assays with their cognate purified integrases and attP loci. Integrating vectors containing either the TG1 or R4 int/attP loci yielded exconjugants in conjugation assays from Escherichia coli to A. marina DSM45569. Site-specific recombination of the plasmids into the host TG1 or R4 attB sites was confirmed by sequencing. Conclusions: The homologous TG1 and R4 attB sites within the genus Amycolatopsis have been identified. The results indicate that vectors based on TG1 and R4 integrases could be widely applicable in this genus.

KW - Amycolatopsis

KW - Integrating vectors

KW - R4 integrase

KW - Rare Actinomycetes

KW - TG1 integrase

UR - http://www.scopus.com/inward/record.url?scp=85066817396&partnerID=8YFLogxK

U2 - 10.1186/s12896-019-0521-y

DO - 10.1186/s12896-019-0521-y

M3 - Article

C2 - 31164159

AN - SCOPUS:85066817396

SN - 1472-6750

VL - 19

JO - BMC Biotechnology

JF - BMC Biotechnology

IS - 1

M1 - 32

ER -