Article Commentary: Identifying the Sequence and Distinguishing the Oxidized—Methionine from Phenylalanine Peptides by MALDI TOF/TOF Mass Spectrometry in an Antarctic Bacterium Pseudomonas Syringae
This short note highlights a procedure to distinguish the residues having similar masses, oxidized methionine and phenylalanine containing peptides using MALDI TOF/TOF. The isotope intensities give a preliminary recognition of peptides containing oxidized methionine. In the peptides with partial oxi...
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crsagepubl:10.4137/pri.s3158 2023-05-15T14:06:44+02:00 Article Commentary: Identifying the Sequence and Distinguishing the Oxidized—Methionine from Phenylalanine Peptides by MALDI TOF/TOF Mass Spectrometry in an Antarctic Bacterium Pseudomonas Syringae Jagannadham, M. V. 2009 http://dx.doi.org/10.4137/pri.s3158 http://journals.sagepub.com/doi/pdf/10.4137/PRI.S3158 http://journals.sagepub.com/doi/full-xml/10.4137/PRI.S3158 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license Proteomics Insights volume 2, page PRI.S3158 ISSN 1178-6418 1178-6418 Molecular Biology Biochemistry journal-article 2009 crsagepubl https://doi.org/10.4137/pri.s3158 2022-04-14T04:48:18Z This short note highlights a procedure to distinguish the residues having similar masses, oxidized methionine and phenylalanine containing peptides using MALDI TOF/TOF. The isotope intensities give a preliminary recognition of peptides containing oxidized methionine. In the peptides with partial oxidation of methionine a mass difference of 16 Da can be observed in the mass finger print of the peptide. Neutral loss of methane sulphenate (CH 3 SOH) in the MS/MS spectra is the most abundant ion in the peptide containing oxidized methionine, whereas this fragment ion is not produced from phenylalanine containing peptide. The mass spectra of methionine, oxidized methionine and phenylalanine containing peptides were examined from the proteins of Pseudomonas syringae Lz4W, whose genome sequence is not known. Article in Journal/Newspaper Antarc* Antarctic SAGE Publications (via Crossref) Antarctic Proteomics Insights 2 PRI.S3158 |
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Open Polar |
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SAGE Publications (via Crossref) |
op_collection_id |
crsagepubl |
language |
English |
topic |
Molecular Biology Biochemistry |
spellingShingle |
Molecular Biology Biochemistry Jagannadham, M. V. Article Commentary: Identifying the Sequence and Distinguishing the Oxidized—Methionine from Phenylalanine Peptides by MALDI TOF/TOF Mass Spectrometry in an Antarctic Bacterium Pseudomonas Syringae |
topic_facet |
Molecular Biology Biochemistry |
description |
This short note highlights a procedure to distinguish the residues having similar masses, oxidized methionine and phenylalanine containing peptides using MALDI TOF/TOF. The isotope intensities give a preliminary recognition of peptides containing oxidized methionine. In the peptides with partial oxidation of methionine a mass difference of 16 Da can be observed in the mass finger print of the peptide. Neutral loss of methane sulphenate (CH 3 SOH) in the MS/MS spectra is the most abundant ion in the peptide containing oxidized methionine, whereas this fragment ion is not produced from phenylalanine containing peptide. The mass spectra of methionine, oxidized methionine and phenylalanine containing peptides were examined from the proteins of Pseudomonas syringae Lz4W, whose genome sequence is not known. |
format |
Article in Journal/Newspaper |
author |
Jagannadham, M. V. |
author_facet |
Jagannadham, M. V. |
author_sort |
Jagannadham, M. V. |
title |
Article Commentary: Identifying the Sequence and Distinguishing the Oxidized—Methionine from Phenylalanine Peptides by MALDI TOF/TOF Mass Spectrometry in an Antarctic Bacterium Pseudomonas Syringae |
title_short |
Article Commentary: Identifying the Sequence and Distinguishing the Oxidized—Methionine from Phenylalanine Peptides by MALDI TOF/TOF Mass Spectrometry in an Antarctic Bacterium Pseudomonas Syringae |
title_full |
Article Commentary: Identifying the Sequence and Distinguishing the Oxidized—Methionine from Phenylalanine Peptides by MALDI TOF/TOF Mass Spectrometry in an Antarctic Bacterium Pseudomonas Syringae |
title_fullStr |
Article Commentary: Identifying the Sequence and Distinguishing the Oxidized—Methionine from Phenylalanine Peptides by MALDI TOF/TOF Mass Spectrometry in an Antarctic Bacterium Pseudomonas Syringae |
title_full_unstemmed |
Article Commentary: Identifying the Sequence and Distinguishing the Oxidized—Methionine from Phenylalanine Peptides by MALDI TOF/TOF Mass Spectrometry in an Antarctic Bacterium Pseudomonas Syringae |
title_sort |
article commentary: identifying the sequence and distinguishing the oxidized—methionine from phenylalanine peptides by maldi tof/tof mass spectrometry in an antarctic bacterium pseudomonas syringae |
publisher |
SAGE Publications |
publishDate |
2009 |
url |
http://dx.doi.org/10.4137/pri.s3158 http://journals.sagepub.com/doi/pdf/10.4137/PRI.S3158 http://journals.sagepub.com/doi/full-xml/10.4137/PRI.S3158 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
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Antarc* Antarctic |
op_source |
Proteomics Insights volume 2, page PRI.S3158 ISSN 1178-6418 1178-6418 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.4137/pri.s3158 |
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Proteomics Insights |
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2 |
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PRI.S3158 |
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1766278785245642752 |