Arines FM, Li M. An optimized protocol to analyze membrane protein degradation in yeast using quantitative western blot and flow cytometry.
STAR Protoc 2022;
3:101274. [PMID:
35403002 PMCID:
PMC8987394 DOI:
10.1016/j.xpro.2022.101274]
[Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/30/2022] Open
Abstract
Membrane proteins (MPs) are essential in many cellular functions. To maintain proteostasis, MPs are downregulated via ubiquitination and degradation. Here, we describe an optimized protocol to analyze MP degradation using quantitative western blot and flow cytometry-based approaches. We use the degradation of Ypq1, a vacuole membrane lysine transporter, to demonstrate the protocol, which can be adapted for other organelle MPs and thus provide useful tools to study MP regulation in yeast and other model organisms.
For complete details on the use and execution of this protocol, please refer to Arines et al. (2021) and Yang et al. (2020).
Two complementary protocols for quantifying membrane protein degradation in yeast
Measures the decrease of full-length protein by quantitative western blot
Quantifies the quenching of GFP fluorescence by flow cytometry
Adaptable to other fluorescent protein tags and mammalian cells
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