A Versatile Strategy for the Semisynthetic Production of Ser65 Phosphorylated Ubiquitin and Its Biochemical and Structural Characterisation

Autor:	Cong, Han, Kuan-Chuan, Pao, Agne, Kazlauskaite, Miratul M K, Muqit, Satpal, Virdee
Rok vydání:	2015
Předmět:	inorganic chemicals Models Molecular Protein Conformation Ubiquitin phosphorylation Ubiquitin-Protein Ligases Phosphoproteins enzyme catalysis Communications Enzyme Activation Serine synthetic methods ligases Disulfides
Zdroj:	Chembiochem
ISSN:	1439-7633
Popis:	Ubiquitin phosphorylation is emerging as an important regulatory layer in the ubiquitin system. This is exemplified by the phosphorylation of ubiquitin on Ser65 by the Parkinson's disease-associated kinase PINK1, which mediates the activation of the E3 ligase Parkin. Additional phosphorylation sites on ubiquitin might also have important cellular roles. Here we report a versatile strategy for preparing phosphorylated ubiquitin. We biochemically and structurally characterise semisynthetic phospho-Ser65-ubiquitin. Unexpectedly, we observed disulfide bond formation between ubiquitin molecules, and hence a novel crystal form. The method outlined provides a direct approach to study the combinatorial effects of phosphorylation on ubiquitin function. Our analysis also suggests that disulfide engineering of ubiquitin could be a useful strategy for obtaining alternative crystal forms of ubiquitin species thereby facilitating structural validation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=pmid________::f468fadf62ccd558bd16154f9b1252b0 https://pubmed.ncbi.nlm.nih.gov/26010437 Zobrazit plný text záznamu Plný text