Complete Genome Sequence of Actinosynnema pretiosum X47, An Industrial Strain that Produces the Antibiotic Ansamitocin AP-3

Complete Genome Sequence of Actinosynnema pretiosum X47, An Industrial Strain that Produces the... Ansamitocins are extraordinarily potent antitumor agents. Ansamitocin P-3 (AP-3), which is produced by Actinosynnema pretiosum, has been developed as a cytotoxic drug for breast cancer. Despite its importance, AP-3 is of limited applicability because of the low production yield. A. pretiosum strain X47 was developed from A. pretiosum ATCC 31565 by mutation breeding and shows a relatively high AP-3 yield. Here, we analyzed the A. pretiosum X47 genome, which is ~8.13 Mb in length with 6693 coding sequences, 58 tRNA genes, and 15 rRNA genes. The DNA sequence of the ansamitocin biosynthetic gene cluster is highly similar to that of the corresponding cluster in A. pretiosum ATCC 31565, with 99.9% identity. However, RT-qPCR analysis showed that the expression levels of ansamitocin biosynthetic genes were significantly increased in X47 compared with the levels in the wild-type strain, consistent with the higher yield of AP-3 in X47. The annotated complete genome sequence of this strain will facilitate understanding the molecular mechanisms of ansamitocin biosynthesis and regulation in A. pretiosum and help further genetic engineering studies to enhance the production of AP-3. Introduction with antibodies, has been approved by the U.S. Food and Drug Administration (FDA) as a cytotoxic drug for breast Ansamitocins http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Current Microbiology Springer Journals

Complete Genome Sequence of Actinosynnema pretiosum X47, An Industrial Strain that Produces the Antibiotic Ansamitocin AP-3

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Publisher
Springer US
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Life Sciences; Microbiology; Biotechnology
ISSN
0343-8651
eISSN
1432-0991
D.O.I.
10.1007/s00284-018-1521-1
Publisher site
See Article on Publisher Site

Abstract

Ansamitocins are extraordinarily potent antitumor agents. Ansamitocin P-3 (AP-3), which is produced by Actinosynnema pretiosum, has been developed as a cytotoxic drug for breast cancer. Despite its importance, AP-3 is of limited applicability because of the low production yield. A. pretiosum strain X47 was developed from A. pretiosum ATCC 31565 by mutation breeding and shows a relatively high AP-3 yield. Here, we analyzed the A. pretiosum X47 genome, which is ~8.13 Mb in length with 6693 coding sequences, 58 tRNA genes, and 15 rRNA genes. The DNA sequence of the ansamitocin biosynthetic gene cluster is highly similar to that of the corresponding cluster in A. pretiosum ATCC 31565, with 99.9% identity. However, RT-qPCR analysis showed that the expression levels of ansamitocin biosynthetic genes were significantly increased in X47 compared with the levels in the wild-type strain, consistent with the higher yield of AP-3 in X47. The annotated complete genome sequence of this strain will facilitate understanding the molecular mechanisms of ansamitocin biosynthesis and regulation in A. pretiosum and help further genetic engineering studies to enhance the production of AP-3. Introduction with antibodies, has been approved by the U.S. Food and Drug Administration (FDA) as a cytotoxic drug for breast Ansamitocins

Journal

Current MicrobiologySpringer Journals

Published: Jun 1, 2018

References

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