Proteomics

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Proteomic analysis of purified protein derivative of mycobacterium tuberculosis

ABSTRACT: Proteomic analysis of Connaught Tuberculin 68 (PPD-CT68), a tuberculin preparation generated froM. tuberculosis, was carried out in this study. PPD-CT68 is the protein component of a commercially available tuberculin preparation, Tubersol, which is used for tuberculin skin testing. Using a high resolution LTQ-Orbitrap Velos mass spectrometer, we identified 265 different proteins. The identified proteins were compared with those identified from PPD M. bovis, PPD M. avium and PPD-S2 from previous mass spectrometry-based studies. In all, 142 proteins were fo PPDs (i.e. proteins in either PPD-CT68 or PPD-S2), 37 proteins were found to be shared with M. avium PPD and 80 were shared with M. bovis PPD. Alignment of PPD-CT68 proteins with proteins encoded by 24 lung infecting bacteria revealed a number of similar proteins (206 bacterial proteins shared epitopes with 47 PPD-CT68 proteins), which could potentially be involved in causing cross-reactivity

INSTRUMENT(S): LTQ Orbitrap

ORGANISM(S): Mycobacterium Tuberculosis H37rv

SUBMITTER: Akhilesh Pandey  

PROVIDER: PXD000377 | Pride | 2014-01-23

REPOSITORIES: Pride

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Dataset's files

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TB_PPD1.msf Msf
TB_PPD1.pep.pep.xml Pepxml
TB_PPD1.raw Raw
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Publications

<h4>Background</h4>Purified protein derivative (PPD) has been used for more than half a century as an antigen for the diagnosis of tuberculosis infection based on delayed type hypersensitivity. Although designated as "purified," in reality, the composition of PPD is highly complex and remains ill-defined. In this report, high resolution mass spectrometry was applied to understand the complexity of its constituent components. A comparative proteomic analysis of various PPD preparations and their  ...[more]

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