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• W2080003290 endingPage "e1003210" @default.
• W2080003290 startingPage "e1003210" @default.
• W2080003290 abstract "Methylation is a post-translational modification that can affect numerous features of proteins, notably cellular localization, turnover, activity, and molecular interactions. Recent genome-wide analyses have considerably extended the list of human genes encoding putative methyltransferases. Studies on protein methyltransferases have revealed that the regulatory function of methylation is not limited to epigenetics, with many non-histone substrates now being discovered. We present here our findings on a novel family of distantly related putative methyltransferases. Affinity purification coupled to mass spectrometry shows a marked preference for these proteins to associate with various chaperones. Based on the spectral data, we were able to identify methylation sites in substrates, notably trimethylation of K135 of KIN/Kin17, K561 of HSPA8/Hsc70 as well as corresponding lysine residues in other Hsp70 isoforms, and K315 of VCP/p97. All modification sites were subsequently confirmed in vitro. In the case of VCP, methylation by METTL21D was stimulated by the addition of the UBX cofactor ASPSCR1, which we show directly interacts with the methyltransferase. This stimulatory effect was lost when we used VCP mutants (R155H, R159G, and R191Q) known to cause Inclusion Body Myopathy with Paget's disease of bone and Fronto-temporal Dementia (IBMPFD) and/or familial Amyotrophic Lateral Sclerosis (ALS). Lysine 315 falls in proximity to the Walker B motif of VCP's first ATPase/D1 domain. Our results indicate that methylation of this site negatively impacts its ATPase activity. Overall, this report uncovers a new role for protein methylation as a regulatory pathway for molecular chaperones and defines a novel regulatory mechanism for the chaperone VCP, whose deregulation is causative of degenerative neuromuscular diseases." @default.
• W2080003290 created "2016-06-24" @default.
• W2080003290 creator A5007863049 @default.
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• W2080003290 creator A5024724276 @default.
• W2080003290 creator A5071097577 @default.
• W2080003290 creator A5089889248 @default.
• W2080003290 date "2013-01-17" @default.
• W2080003290 modified "2023-10-04" @default.
• W2080003290 title "A Newly Uncovered Group of Distantly Related Lysine Methyltransferases Preferentially Interact with Molecular Chaperones to Regulate Their Activity" @default.
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• W2080003290 doi "https://doi.org/10.1371/journal.pgen.1003210" @default.
• W2080003290 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3547847" @default.
• W2080003290 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23349634" @default.
• W2080003290 hasPublicationYear "2013" @default.
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