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pubmed-article:15917623rdf:typepubmed:Citationlld:pubmed
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pubmed-article:15917623pubmed:dateCreated2005-5-26lld:pubmed
pubmed-article:15917623pubmed:abstractTextUbiquitin-activating enzyme is the archetype for a family of enzymes catalyzing the ATP-coupled activation of ubiquitin and other class 1 ubiquitin-like proteins required for their subsequent conjugation to cellular targets. The general physical and mechanistic features of the E1 family appear well conserved. Formation of an obligatory E1-ubiquitin thiol ester intermediate forms the basis of a one-step covalent purification of the enzyme on ubiquitin-linked affinity columns that has been adapted for the isolation of E1 paralogs. We describe the facile purification of active E1 from outdated human red blood cells in yields (2-4 nmol/U of blood) that make this an attractive alternative to expression of the proteolytically labile recombinant protein. In addition, two stoichiometric activity assays are described that rely on formation of the E1 125I-ubiquitin thiol ester and ubiquitin [2,8-3H]adenylate intermediates.lld:pubmed
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pubmed-article:15917623pubmed:statusMEDLINElld:pubmed
pubmed-article:15917623pubmed:issn1064-3745lld:pubmed
pubmed-article:15917623pubmed:authorpubmed-author:HaasArthur...lld:pubmed
pubmed-article:15917623pubmed:issnTypePrintlld:pubmed
pubmed-article:15917623pubmed:volume301lld:pubmed
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pubmed-article:15917623pubmed:pagination23-35lld:pubmed
pubmed-article:15917623pubmed:dateRevised2007-11-14lld:pubmed
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pubmed-article:15917623pubmed:year2005lld:pubmed
pubmed-article:15917623pubmed:articleTitlePurification of E1 and E1-like enzymes.lld:pubmed
pubmed-article:15917623pubmed:affiliationDepartment of Biochemistry and Molecular Biology, Louisiana State University Health Science Center, New Orleans, USA.lld:pubmed
pubmed-article:15917623pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:15917623pubmed:publicationTypeResearch Support, U.S. Gov't, P.H.S.lld:pubmed
pubmed-article:15917623pubmed:publicationTypeResearch Support, N.I.H., Extramurallld:pubmed