Chemotaxis away from thiocyanic and isothiocyanic esters in<i>Pseudomonas aeruginosa</i>

Ohga, T; Masduki, Agus; Kato, Junichi; Ohtake, Hisao

doi:10.1111/j.1574-6968.1993.tb06488.x

Cited by 27 publications

(2 citation statements)

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“…As for NCS Ϫ , none of the reported studies could detect biological activities on the analyzed bacteria and fungi (15,32). On the other hand, a limited number of studies have demonstrated that bacteria belonging to Pseudomonas genus showed a negative chemotaxis to CH 3 SCN (33,34). Based on this finding, we hypothesized that CH 3 SCN synthesized by Arabidopsis also had biological activities toward bacteria.…”

Section: In Vitro Antibacterial Activities Of Ncsmentioning

confidence: 95%

Arabidopsis HARMLESS TO OZONE LAYER Protein Methylates a Glucosinolate Breakdown Product and Functions in Resistance to Pseudomonas syringae pv. maculicola

Nagatoshi

Nakamura

2009

Journal of Biological Chemistry

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Almost all of the chlorine-containing gas emitted from natural sources is methyl chloride (CH 3 Cl), which contributes to the destruction of the stratospheric ozone layer. Methyl chloride (CH 3 Cl) is the most abundant halohydrocarbon emitted into the atmosphere and constitutes about 17% of the chlorine currently in the stratosphere (1). CH 3 Cl is derived mainly from natural sources and contributes to the destruction of the stratospheric ozone layer. As the total abundance of ozone-depleting gases such as chlorofluorocarbons in the atmosphere has begun to decrease in recent years as a result of The Montreal Protocol on Substances That Deplete the Ozone Layer, the impact of CH 3 Cl emission from natural sources will become greater on the atmospheric chemistry. CH 3 Cl emission into the atmosphere has been estimated at 1,700 -13,600 Gg/year (1), which underscores the great uncertainty of the estimation. Oceans (2), biomass burning (3), woodrotting fungi, and coastal salt marshes (4) are the major sources of CH 3 Cl production. Recently, it was reported that large amounts of CH 3 Cl are emitted from tropical and subtropical plants, which are hence considered as the major sources of CH 3 Cl (5-7). It was estimated that the CH 3 Cl emission from tropical plants could account for 30 -50% of the global CH 3 Cl emission (8). To accomplish an accurate estimation of CH 3 Cl production in the atmosphere through "bottom-up" approaches, elucidating the mechanisms and physiological functions of CH 3 Cl emission from plants will be important.The biological synthesis of methyl halides has been demonstrated mainly by biochemical analyses. The enzymatic activities that transfer a methyl group from S-adenosyl-L-methionine (SAM) 2 to halide ions (Cl Ϫ , Br Ϫ , I Ϫ ), which synthesize methyl halides, were first discovered in cell-free extracts of Phellinus pomaceus (a white rot fungus), Endocladia muricata (a marine red alga), and Mesembryanthemum crystallinum (ice plant, a halophytic plant) (9). Enzyme purification and cDNA cloning of the methyl chloride transferase (MCT) was first reported with Batis maritima, a halophytic plant that grows abundantly in salt marshes. As high concentrations of ions such as Cl Ϫ are often detrimental to plants, halophytic plants are considered to possess various salt tolerance mechanisms. MCT was hypothesized to control and regulate the internal concentration of Cl Ϫ , rich in the habitat in which halophytic plant grows (10, 11).In the meantime, purification of thiol methyltransferase (TMT), which methylates bisulfide (HS 2 The abbreviations used are: SAM, S-adenosyl-L-methionine; GC-ECD, gas chromatography equipped with an electron capture detector; GC-MS, gas chromatography/mass spectrometry; HOL, harmless to ozone layer; HPLC, high performance liquid chromatography; MCT, methyl chloride transferase; MS, Murashige-Skoog; RT, reverse transcription; SAH, S-adenosyl-Lhomocysteine; TMT, thiol methyltransferase.

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Section: In Vitro Antibacterial Activities Of Ncsmentioning

confidence: 95%

Arabidopsis HARMLESS TO OZONE LAYER Protein Methylates a Glucosinolate Breakdown Product and Functions in Resistance to Pseudomonas syringae pv. maculicola

Nagatoshi

Nakamura

2009

Journal of Biological Chemistry

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“…The assignment of P. aeruginosa PAO1 chemoreceptors to their respective chemosensory pathways was reported by Ortega et al (10). thiocyanic esters (32,33). More recent work has brought insight into the molecular mechanisms involved and has led to the identification of many of the corresponding chemoreceptors (Table 1).…”

Section: Molecular Mechanisms and Chemoreceptors For Chemotaxismentioning

confidence: 80%

Pseudomonas aeruginosa as a Model To Study Chemosensory Pathway Signaling

Matilla

Martín‐Mora

Gavira

et al. 2021

Microbiol Mol Biol Rev

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SUMMARY Bacteria have evolved a variety of signal transduction mechanisms that generate different outputs in response to external stimuli. Chemosensory pathways are widespread in bacteria and are among the most complex signaling mechanisms, requiring the participation of at least six proteins. These pathways mediate flagellar chemotaxis, in addition to controlling alternative functions such as second messenger levels or twitching motility. The human pathogen Pseudomonas aeruginosa has four different chemosensory pathways that carry out different functions and are stimulated by signal binding to 26 chemoreceptors. Recent research employing a diverse range of experimental approaches has advanced enormously our knowledge on these four pathways, establishing P. aeruginosa as a primary model organism in this field. In the first part of this article, we review data on the function and physiological relevance of chemosensory pathways as well as their involvement in virulence, whereas the different transcriptional and posttranscriptional regulatory mechanisms that govern pathway function are summarized in the second part. The information presented will be of help to advance the understanding of pathway function in other organisms.

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PseudomonasMotility and Chemotaxis

Kato

2008

Pseudomonas

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Chemotaxis away from thiocyanic and isothiocyanic esters inPseudomonas aeruginosa

Cited by 27 publications

References 12 publications

Arabidopsis HARMLESS TO OZONE LAYER Protein Methylates a Glucosinolate Breakdown Product and Functions in Resistance to Pseudomonas syringae pv. maculicola

Arabidopsis HARMLESS TO OZONE LAYER Protein Methylates a Glucosinolate Breakdown Product and Functions in Resistance to Pseudomonas syringae pv. maculicola

Pseudomonas aeruginosa as a Model To Study Chemosensory Pathway Signaling

PseudomonasMotility and Chemotaxis

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