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Ubiquitin (Ub) modification of proteins plays a prominent role in the regulation of multiple cell processes, including endoplasmic reticulum-associated degradation (ERAD). Until recently, ubiquitination of substrates was thought to occur only via isopeptide bonds, typically to lysine residues. Several recent studies suggest that Ub can also be coupled to nonlysine residues by ester/thiolester bonds; however, the molecular basis for these novel modifications remains elusive. To probe the mechanism and importance of nonlysine ubiquitination, we have studied the viral ligase murine K3 (mK3), which facilitates the polyubiquitination of hydroxylated amino acids serine/threonine on its ERAD substrate. In this paper, we identify Ube2j2 as the primary cellular E2 recruited by the mK3 ligase, and this E2-E3 pair is capable of conjugating Ub on lysine or serine residues of substrates. However, surprisingly, Ube2j2-mK3 preferentially promotes ubiquitination of hydroxylated amino acids via ester bonds even when lysine residues are present on wild-type substrates, thus establishing physiological relevance of this novel ubiquitination strategy.
Pubmed ID: 19951915 RIS Download
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THIS RESOURCE IS NO LONGER IN SERVICE, documented on August 17, 2021. An Antibody supplier.
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View all literature mentionsCommercial supplier of antibodies, reagents, and dyes for research.
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THIS RESOURCE IS NO LONGER IN SERVICE. Documented January 29, 2018.
From website: "Note that the eXpress software is also no longer being developed. We recommend you use kallisto instead." Kallisto can be found at http://pachterlab.github.io/kallisto/.
Software for streaming quantification for high-throughput DNA/RNA sequencing.
Can be used in any application where abundances of target sequences need to be estimated from short reads sequenced from them.
Cell line HEK293T is a Transformed cell line with a species of origin Homo sapiens (Human)
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