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Anal Chem ; 90(10): 6028-6034, 2018 05 15.
Article in English | MEDLINE | ID: mdl-29676898

ABSTRACT

Chemical cross-linking combined with mass spectrometry provides a method to study protein structures and interactions. The introduction of cleavable bonds in a cross-linker provides an avenue to decouple released peptide masses from their precursor species, greatly simplifying the downstream search, allowing for whole proteome investigations to be performed. Typically, these experiments have been challenging to carry out, often utilizing nonstandard methods to fully identify cross-linked peptides. Mango is an open source software tool that extracts precursor masses from chimeric spectra generated using cleavable cross-linkers, greatly simplifying the downstream search. As it is designed to work with chimeric spectra, Mango can be used on traditional high-resolution tandem mass spectrometry (MS/MS) capable mass spectrometers without the need for additional modifications. When paired with a traditional proteomics search engine, Mango can be used to identify several thousand cross-linked peptide pairs searching against the entire Escherichia coli proteome. Mango provides an avenue to perform whole proteome cross-linking experiments without specialized instrumentation or access to nonstandard methods.


Subject(s)
Cross-Linking Reagents/analysis , Peptides/analysis , Software , Cross-Linking Reagents/pharmacology , Escherichia coli/chemistry , Mass Spectrometry , Peptides/pharmacology , Proteome/antagonists & inhibitors , Proteome/metabolism
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