Dataset Information

Monitoring global protein thiol-oxidation and protein S-mycothiolation in Corynebacterium diphtheriae under hypochlorite stress

ABSTRACT: Mycothiol (AcCys-GlcN-Ins, MSH) is the major thiol-redox buffer in Actinomycetes, including Mycobacterium and Corynebacterium species. Protein S-mycothiolation controls the activities of several redox enzymes that function in detoxification of ROS and methionine sulfoxides, including the thiol peroxidase Tpx, the mycothiol peroxidase Mpx and the methionine sulfoxide reductase MsrA. Here we investigated the level of protein S-mycothiolation in Corynebacterium diphtheriae DSM43989 under oxidative stress as well as its NaOCl stress response.

INSTRUMENT(S): LTQ Orbitrap Velos

ORGANISM(S): Corynebacterium Diphtheriae

SUBMITTER: Melanie Hillion

LAB HEAD: Haike Antelmann

PROVIDER: PXD003321 | Pride | 2017-07-17

REPOSITORIES: Pride

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Publications

The glyceraldehyde-3-phosphate dehydrogenase GapDH of Corynebacterium diphtheriae is redox-controlled by protein S-mycothiolation under oxidative stress.

Hillion Melanie M Imber Marcel M Pedre Brandán B Bernhardt Jörg J Saleh Malek M Loi Vu Van VV Maaß Sandra S Becher Dörte D Astolfi Rosado Leonardo L Adrian Lorenz L Weise Christoph C Hell Rüdiger R Wirtz Markus M Messens Joris J Antelmann Haike H

Scientific reports 20170710 1

Mycothiol (MSH) is the major low molecular weight (LMW) thiol in Actinomycetes and functions in post-translational thiol-modification by protein S-mycothiolation as emerging thiol-protection and redox-regulatory mechanism. Here, we have used shotgun-proteomics to identify 26 S-mycothiolated proteins in the pathogen Corynebacterium diphtheriae DSM43989 under hypochlorite stress that are involved in energy metabolism, amino acid and nucleotide biosynthesis, antioxidant functions and translation. T ...[more]

PMID: 28694441

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Project description:This proteomic study This proteomic study focuses on the role of reversible thiol oxidation after hexyl aminolevulinate mediated PDT (HAL-PDT). The human epidermoid carcinoma cell line A431 was used as model system and red light as light source, a clinical relevant in vitro model. The light dose dependent cell cytotoxicity was measured by resazurin assay. The most clinical relevant dose, LD100, was used for the proteomic part of the study and cells where harvested 30 min after treatment. The reversibly oxidized thiol proteins were selected by biotinylation and identified by mass spectrometry. This proteomic technique revealed over 1100 thiol proteins which were reversibly oxidized after HAL-PDT. Identified proteins were analysed by bioinformatics (IPA and GO) and a list of reliable identified proteins (282 proteins) where further analysed. Both the cellular location and function was determined for these proteins. In addition, 18 of the proteins where identified as redox regulated, 36 to be a part of the apoptotic pathway and 9 to be both redox regulated and a part of apoptotic pathway. From these results we suggest redox regulated proteins as a trigger mechanism for PDT induced apoptosis.focuses on the role of reversible thiol oxidation after hexyl aminolevulinate mediated PDT (HAL-PDT). The human epidermoid carcinoma cell line A431 was used as model system and red light as light source, a clinical relevant in vitro model. The light dose dependent cell cytotoxicity was measured by resazurin assay. The most clinical relevant dose, LD100, was used for the proteomic part of the study and cells where harvested 30 min after treatment. The reversibly oxidized thiol proteins were selected by biotinylation and identified by mass spectrometry. This proteomic technique revealed over 1100 thiol proteins which were reversibly oxidized after HAL-PDT. Identified proteins were analysed by bioinformatics (IPA and GO) and a list of reliable identified proteins (282 proteins) where further analysed. Both the cellular location and function was determined for these proteins. In addition, 18 of the proteins where identified as redox regulated, 36 to be a part of the apoptotic pathway and 9 to be both redox regulated and a part of apoptotic pathway. From these results we suggest redox regulated proteins as a trigger mechanism for PDT induced apoptosis.

			Action	DRS
	Cdip_Control1_protXML	Other
	Cdip_Control2_protXML	Other
	Cdip_Stress1_protXML	Other
	Cdip_Stress2_protXML	Other
	Cdip_Stress3_protXML	Other