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Depletion of Myofibril-Associated Proteins Using Selective Protein Extraction as a Tool in Cardiac Proteomics

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Tissue Proteomics

Abstract

Muscle tissue poses a particular challenge to proteomic analysis due to a very wide range of protein abundances arising from the dominant expression of myofilament-related proteins. We address this issue by describing proteomic analysis with liquid chromatography–mass spectrometry (LC-MS) and sequential window acquisition of all theoretical mass spectra (SWATH), of guinea pig cardiac tissue prepared in two homogenization buffers: (1) An SDS-based buffer designed to extract “all” tissue proteins and (2) a long-established EDTA-containing buffer thought to preferentially extract non-myofibril-related proteins. We use gene ontology (GO) annotation-based assessment of subcellular localization to indicate if these enriched proteins congregate in the cytoplasm or in organellar lumens. This technique results in the preferential quantitation of less abundant non-myofibrillar proteins and, for future studies, offers the opportunity for more complete analyses of changes in heart tissue protein expression with biological circumstance.

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Acknowledgments

This work was supported by the Medical Research Council (MR/L009560/1 and G0902091). The authors would like to thank Sir Philip Cohen for helpful discussions.

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Correspondence to Achim Treumann .

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Treumann, A. et al. (2017). Depletion of Myofibril-Associated Proteins Using Selective Protein Extraction as a Tool in Cardiac Proteomics. In: Sarwal, M., Sigdel, T. (eds) Tissue Proteomics. Methods in Molecular Biology, vol 1788. Humana Press, New York, NY. https://doi.org/10.1007/7651_2017_73

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  • DOI: https://doi.org/10.1007/7651_2017_73

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  • Publisher Name: Humana Press, New York, NY

  • Print ISBN: 978-1-4939-7852-6

  • Online ISBN: 978-1-4939-7854-0

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