Dataset Information

Whole-cell proteome of Metallosphaera javensis strain AS-7 and Microcaldus variisymbioticus strain ARM1

ABSTRACT: Identification of the proteins from tryptic digests of Metallosphaera javensis strain AS-7 and Microcaldus variisymbioticus strain ARM1 whole-cell proteome followed by nanoLC/OrbitrapFusion MS analysis.

ORGANISM(S): Cellular Organisms

SUBMITTER: Satoshi Nakagawa

PROVIDER: PXD052059 | JPOST Repository | Wed Aug 21 00:00:00 BST 2024

REPOSITORIES: jPOST

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Dataset's files

Source:

			Action	DRS
	AS7ARM1.xlsx	Xlsx
	AS7ARM1_1.raw	Raw

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Publications

N-linked protein glycosylation in Nanobdellati (formerly DPANN) archaea and their hosts.

Nakagawa Satoshi S Sakai Hiroyuki D HD Shimamura Shigeru S Takamatsu Yoshiki Y Kato Shingo S Yagi Hirokazu H Yanaka Saeko S Yagi-Utsumi Maho M Kurosawa Norio N Ohkuma Moriya M Kato Koichi K Takai Ken K

Journal of bacteriology 20240828 9

Members of the kingdom Nanobdellati, previously known as DPANN archaea, are characterized by ultrasmall cell sizes and reduced genomes. They primarily thrive through ectosymbiotic interactions with specific hosts in diverse environments. Recent successful cultivations have emphasized the importance of adhesion to host cells for understanding the ecophysiology of Nanobdellati. Cell adhesion is often mediated by cell surface carbohydrates, and in archaea, this may be facilitated by t ...[more]

PMID: 39194224

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Project description:Thermomacidophilic archaea, such as Metallosphaera sedula, are lithoautotrophs that occupy metal-rich environments. In previous studies, a M. sedula mutant lacking the primary copper efflux transporter, CopA, became copper sensitive. In contrast, the basis for supra-normal copper resistance remained unclear in the spontaneous M. sedula mutant, CuR1. Here, transcriptomic analysis of copper-shocked cultures indicated that CuR1 had a unique regulatory response to metal challenge corresponding to up-regulation of 55 genes. Genome re-sequencing identified 17 confirmed mutations unique to CuR1 that were likely to change gene function. Of these, 12 mapped to genes with annotated function associated with transcription, metabolism or transport. These mutations included 7 non-synonymous substitutions, 4 insertions and 1 deletion. One of the insertion mutations mapped to pseudogene, Msed_1517, and extended its reading frame an additional 209 amino acids. The extended mutant allele was identified as a homolog of Pho4, a family of phosphate symporters that include the bacterial PitA proteins. Orthologs of this allele were apparent in related extremely thermoacidophilic species, suggesting M. sedula was naturally lacking this gene. Phosphate transport studies combined with physiologic analysis demonstrated M. sedula PitA was a low affinity high velocity secondary transporter implicated in copper resistance and arsenate sensitivity. Genetic analysis demonstrated spontaneous arsenate resistant mutants derived from CuR1 all underwent mutation in pitA and non-selectively became copper resistant. Taken together, these results point to archaeal PitA as a key requirement for the increased metal resistance of strain CuR1 and its accelerated capacity for copper bioleaching. The study comprises 5 samples, described in detail below. WT_CuR1: Differential transcriptional response of Metallosphaera sedula DSM 5348, WT, to the supra-normal copper resistant spontaneous Metallosphaera sedula mutant, CuR1 under normal growth conditions. This experiment was done to analyze the differential transcription of WT cells compared with CuR1 cells at mid log phase. WT-15_CuR1-15: Differential transcription of Metallosphaera cells under sub-inhibitory copper challenge (2.0 mM). This experiment was done to analyze the differential transcription of Metallosphaera sedula WT and CuR1 15 minutes post copper challenge. The copper cultures were harvested 15 minutes after the shock. WT-60_CuR1-60: Differential transcription of Metallosphaera cells under sub-inhibitory copper challenge (2.0 mM). This experiment was done to analyze the differential transcription of Metallosphaera sedula WT and CuR1 60 minutes post copper challenge. The copper cultures were harvested 60 minutes after the shock. WT-15_WT-60: Differential transcription of Metallosphaera cells under sub-inhibitory copper challenge (2.0 mM). This experiment was done to analyze the differential transcription of Metallosphaera sedula WT 15 and 60 minutes post copper challenge. The copper cultures were harvested 15 and 60 minutes after the shock, respectively. CuR1-15_CuR1-60: Differential transcription of Metallosphaera cells under sub-inhibitory copper challenge (2.0 mM). This experiment was done to analyze the differential transcription of Metallosphaera sedula CuR1 15 and 60 minutes post copper challenge. The copper cultures were harvested 15 and 60 minutes after the shock, respectively.

Dataset Information

Whole-cell proteome of Metallosphaera javensis strain AS-7 and Microcaldus variisymbioticus strain ARM1

Dataset's files

Publications

<i>N</i>-linked protein glycosylation in <i>Nanobdellati</i> (formerly DPANN) archaea and their hosts.

Similar Datasets

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