Research Project: Memeli Hücre Yüzeyi Proteinlerinin Geniş Kapsamlı Proteomik Analizi için Yeni Metot Geliştirilmesi
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Contributors
Funders
ID
TB.00298
Authors
Yunt, Zeynep Sabahat
Teaching Faculty
Publications
Proximal biotinylation-based combinatory approach for isolating integral plasma membrane proteins
(American Chemical Society, 2020) Akdağ, Mehmet; Kamacıoğlu, Altuğ; Qureshi, Mohammad Haroon; Yunt, Zeynep Sabahat; Akarlar, Büşra; Department of Molecular Biology and Genetics; No; College of Sciences
Comprehensive profiling of the cell-surface proteome has been challenging due to the lack of tools for an effective and reproducible way to isolate plasma membrane proteins from mammalian cells. Here we employ a proximity-dependent biotinylation approach to label and isolate plasma membrane proteins without an extra in vitro labeling step, which we call Plasma Membrane-BiolD. The lipid-modified BirA* enzyme (MyrPalm BirA*) was targeted to the inner leaflet of the plasma membrane, where it effectively biotinylated plasma membrane proteins. Biotinylated proteins were then affinity-purified and analyzed by mass spectrometry. Our analysis demonstrates that combining conventional sucrose density gradient centrifugation and Plasma Membrane-BioID is ideal to overcome the inherent limitations of the identification of integral membrane proteins, and it yields highly pure plasma components for downstream proteomic analysis.
