title: Molecular basis for substrate recognition by lysine methyltransferases and demethylases.
abstract: Lysine methylation has emerged as a prominent covalent modification in histones and non-histone proteins. This modification has been implicated in numerous genomic processes, including heterochromatinization, cell cycle progression, DNA damage response, DNA replication, genome stability, and epigenetic gene regulation that underpins developmental programs defining cell identity and fate. The site and degree of lysine methylation is dynamically modulated through the enzymatic activities of protein lysine methyltransferases (KMTs) and protein lysine demethylases (KDMs). These enzymes display distinct substrate specificities that in part define their biological functions. This review explores recent progress in elucidating the molecular basis of these specificities, highlighting structural and functional studies of the methyltransferases SUV4-20H1 (KMT5B), SUV4-20H2 (KMT5C), and ATXR5, and the demethylases UTX (KDM6A), JMJD3 (KDM6B), and JMJD2D (KDM4D). We conclude by examining these findings in the context of related KMTs and KDMs and by exploring unresolved questions regarding the specificities and functions of these enzymes.
authors.affiliation: Department of Biological Chemistry, University of Michigan, Ann Arbor, MI 48109, USA.
authors.forename: Paul A
authors.initials: PA
authors.lastname: Del Rizzo
authors.affiliation: Department of Biological Chemistry, University of Michigan, Ann Arbor, MI 48109, USA. Electronic address: rtrievel@umich.edu.
authors.forename: Raymond C
authors.initials: RC
authors.lastname: Trievel
mesh_terms: D000818:Animals; D056466:Histone Demethylases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D011495:Histone-Lysine N-Methyltransferase / Q000737:chemistry / Q000235:genetics / Q000378:metabolism* / Q000502:physiology; D006657:Histones / Q000737:chemistry / Q000378:metabolism*; D006801:Humans; D008239:Lysine / Q000737:chemistry / Q000378:metabolism*; D008745:Methylation; D008958:Models, Molecular; D011485:Protein Binding / Q000235:genetics; D013379:Substrate Specificity
chemical_list: D006657:Histones; D056466:Histone Demethylases; D011495:Histone-Lysine N-Methyltransferase; C542918:KMT5C protein, human; D008239:Lysine
keywords: Chromatin; Histone lysine methylation; Lysine demethylase; Lysine methyltransferase; Substrate specificity; Transcription