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DNA gyrase could be a crucial regulatory factor for growth and survival of Mycobacterium leprae

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Title: DNA gyrase could be a crucial regulatory factor for growth and survival of Mycobacterium leprae
Authors: Kim, Hyun Browse this author
Fukutomi, Yasuo Browse this author
Nakajima, Chie Browse this author →KAKEN DB
Kim, Youn Uck Browse this author
Mori, Shigetarou Browse this author
Shibayama, Keigo Browse this author
Nakata, Noboru Browse this author
Suzuki, Yasuhiko Browse this author →KAKEN DB
Keywords: DNA gyrase
Mycobacterium leprae
Issue Date: 25-Jul-2019
Publisher: Nature Publishing Group
Journal Title: Scientific reports
Volume: 9
Start Page: 10815
Publisher DOI: 10.1038/s41598-019-47364-5
Abstract: Leprosy, an important infectious disease in humans caused by Mycobacterium leprae (Mle), remains endemic in many countries. Notably, the pathogen cannot be cultured in vitro, except in mouse footpads in vivo. The molecular basis of these characteristics and the mechanisms remain unknown. Consequently, analysis of Mle growth and survival is urgently needed to develop novel therapies against leprosy, including rapid, simple, and specific methods to detect infection. Here, we demonstrated the functional role and contribution of Mle-DNA gyrase, which regulates DNA topology, DNA replication, and chromosome segregation to promote bacterial growth and survival, in Mle growth and survival in vitro and in vivo. The optimum temperature for Mle-DNA gyrase activity was 30 degrees C. When the DNA gyrB-gyrA genes in Mycobacterium smegmatis were replaced with the Mle gyrase genes by allelic exchange, the recombinants could not grow at 37 degrees C. Moreover, using radiorespirometry analysis for viability of Mle bacilli, we found that Mle growth was more vigorous at 25-30 degrees C than at 37 degrees C, but was inhibited above 40 degrees C. These results propose that DNA gyrase is a crucial factor for Mle growth and survival and its sensitivity to temperature may be exploited in heat-based treatment of leprosy.
Type: article
Appears in Collections:国際連携研究教育局 : GI-CoRE (Global Institution for Collaborative Research and Education : GI-CoRE) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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