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Next Generation Sequencing Facilitates Quantitative Analysis of Klebsiella pneumoniae strain HKE9, HKE9-M-rpoS,HKE9-C-M-ropS

ABSTRACT: Compared with HKE9, HKE9-M-rpoS (rpoS knockout in hypervirulent Klebsiella pneumoniae strain HKE9) had 624 genes expressed significantly different, among which 148 genes were significantly up-regulated and 476 genes were significantly down-regulated, 586 genes on chromosomes, 10 genes on circular plasmid and 28 genes on linear plasmid; HKE9-C-M-rpoS had 746 genes expressed significantly different, among which 286 genes were significantly up-regulated and 460 genes were significantly down-regulated, 727 genes on chromosomes, 11 genes on circular plasmid and 8 genes on linear plasmid. Compared with HKE9-M-rpoS, HKE9-C-M-rpoS (rpoS complement in strain HKE9-M-rpoS) had 509 genes expressed significantly different, among which 324 genes were significantly up-regulated and 185 genes were significantly down-regulated, 458 genes on chromosomes, 3 genes on circular plasmid and 48 genes on linear plasmid.

ORGANISM(S): Klebsiella pneumoniae

PROVIDER: GSE224709 | GEO | 2023/11/15

REPOSITORIES: GEO

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Project description:The alternative sigma factor RpoS plays a central role in the critical host-adaptive response of the Lyme disease spirochete, Borrelia burgdorferi. We previously identified bbd18 as a negative regulator of RpoS but could not inactivate bbd18 in wild-type spirochetes. In the current study we employed an inducible bbd18 gene to demonstrate the essential nature of BBD18 for viability of wild-type spirochete viability in vitro and at a unique point in vivo. Transcriptomic analyses of BBD18 depleted cells demonstrated global induction of RpoS-dependent genes prior to lysis, with the absolute requirement for BBD18, both in vitro and in vivo, circumvented by deletion of rpoS. The increased expression of plasmid prophage genes and the presence of phage particles in the supernatants of lysing cultures indicate that RpoS regulates phage lysis-lysogeny decisions. Through this work we identify a mechanistic link between endogenous transducing prophages and the RpoS-dependent adaptive response of the Lyme disease spirochete. The alternative sigma factor RpoS plays a central role in the critical host-adaptive response of the Lyme disease spirochete, Borrelia burgdorferi. We previously identified bbd18 as a negative regulator of RpoS but could not inactivate bbd18 in wild-type spirochetes. In the current study we employed an inducible bbd18 gene to demonstrate the essential nature of BBD18 for viability of wild-type spirochete viability in vitro and at a unique point in vivo. Transcriptomic analyses of BBD18 depleted cells demonstrated global induction of RpoS-dependent genes prior to lysis, with the absolute requirement for BBD18, both in vitro and in vivo, circumvented by deletion of rpoS. The increased expression of plasmid prophage genes and the presence of phage particles in the supernatants of lysing cultures indicate that RpoS regulates phage lysis-lysogeny decisions. Through this work we identify a mechanistic link between endogenous transducing prophages and the RpoS-dependent adaptive response of the Lyme disease spirochete.

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Next Generation Sequencing Facilitates Quantitative Analysis of Klebsiella pneumoniae strain HKE9, HKE9-M-rpoS,HKE9-C-M-ropS

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