An antibody free approach to probe the presence of poly-ubiquitin chains on C. elegans sperm derived organelles after fertilization - Sorbonne Université Access content directly
Journal Articles microPublication Biology Year : 2023

An antibody free approach to probe the presence of poly-ubiquitin chains on C. elegans sperm derived organelles after fertilization

Abstract

Upon C. elegans’s oocyte fertilization, the sperm brings mitochondria and membranous organelles (MOs) which are rapidly eliminated by autophagy. Their poly-ubiquitylation is suspected to be a signal for their recognition and degradation but mitochondria poly-ubiquitylation remains debated. Using fluorescent Tandem-repeated Ubiquitin-Binding Entities (TUBEs) we confirmed the presence of K48- and K63-ubiquitin chains on MOs contrasting with the absence of signal on sperm mitochondria. This new and sensitive approach confirmed the poly-ubiquitylation of the MOs while providing additional arguments for the absence of substantial poly-ubiquitylation of sperm-derived mitochondria, suggesting that K63- and K48-poly-ubiquitylation are unlikely acting as a common targeting signal for their degradation.

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Dates and versions

hal-04222284 , version 1 (29-01-2024)

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Justine Cailloce, Fanny Husson, Vincent Galy, Jorge Merlet. An antibody free approach to probe the presence of poly-ubiquitin chains on C. elegans sperm derived organelles after fertilization. microPublication Biology, 2023, ⟨10.17912/micropub.biology.000972⟩. ⟨hal-04222284⟩
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