An acetyltransferase (also referred to as a transacetylase) is any of a class of transferase enzymes that transfers an acetyl group in a reaction called acetylation. In biological organisms, post-translational modification of a protein via acetylation can profoundly transform its functionality by altering various properties like hydrophobicity, solubility, and surface attributes. These alterations have the potential to influence the protein's conformation and its interactions with substrates, cofactors, and other macromolecules.
Types of acetyltransferases
Acetyltransferases | Substrate | Gene | Chromosome locus in humans | Gene group | Abbreviation |
Histone acetyltransferase | Lysine residues of histones | HAT1 | 2q31.1 | Lysine acetyltransferases | HAT |
Choline acetyltransferase | Choline | CHAT | 10q11.23 | NA | ChAT |
Serotonin N-acetyltransferase | Serotonin | AANAT | 17q25.1 | GCN5-related N-acetyltransferases | AANAT |
NatA acetyltransferase | N-terminus of various proteins as they emerge from the ribosome | NAA15 | 4q31.1 | Armadillo-like helical domain containing N-alpha-acetyltransferase subunits | NatA |
NatB acetyltransferase | Peptides starting with Met-Asp/Glu/Asn/Gln | NAA25 | 12q24.13 | N-alpha-acetyltransferase subunits of
microRNA protein-coding host genes |
NatB |
Additional examples of acetyltransferases found in nature include:
Structure
The predicted three-dimensional structures of histone, choline, and serotonin acetyltransferases are shown below. As with all enzymes, the structures of acetyltransferases are essential for interactions between them and their substrates; alterations to the structures of these enzymes often result in a loss of enzymatic activity.
- 3D structure of histone acetyltransferase
- 3D Structure of choline acetyltransferase
- 3D structure of serotonin N-acetyltransferase
See also
References
- ^ Marmorstein R, Zhou MM (July 2014). "Writers and readers of histone acetylation: structure, mechanism, and inhibition". Cold Spring Harbor Perspectives in Biology. 6 (7): a018762. doi:10.1101/cshperspect.a018762. PMC 4067988. PMID 24984779.
- ^ Verreault A, Kaufman PD, Kobayashi R, Stillman B (January 1998). "Nucleosomal DNA regulates the core-histone-binding subunit of the human Hat1 acetyltransferase". Current Biology. 8 (2): 96–108. doi:10.1016/s0960-9822(98)70040-5. PMID 9427644. S2CID 201273.
- ^ Kim AR, Rylett RJ, Shilton BH (December 2006). "Substrate binding and catalytic mechanism of human choline acetyltransferase". Biochemistry. 45 (49): 14621–14631. doi:10.1021/bi061536l. PMID 17144655.
- ^ Strauss WL, Kemper RR, Jayakar P, Kong CF, Hersh LB, Hilt DC, Rabin M (February 1991). "Human choline acetyltransferase gene maps to region 10q11-q22.2 by in situ hybridization". Genomics. 9 (2): 396–398. doi:10.1016/0888-7543(91)90273-H. PMID 1840566.
- ^ Coon SL, Mazuruk K, Bernard M, Roseboom PH, Klein DC, Rodriguez IR (May 1996). "The human serotonin N-acetyltransferase (EC 2.3.1.87) gene (AANAT): structure, chromosomal localization, and tissue expression". Genomics. 34 (1): 76–84. doi:10.1006/geno.1996.0243. PMID 8661026.
- ^ Arnesen T, Van Damme P, Polevoda B, Helsens K, Evjenth R, Colaert N, et al. (May 2009). "Proteomics analyses reveal the evolutionary conservation and divergence of N-terminal acetyltransferases from yeast and humans". Proceedings of the National Academy of Sciences of the United States of America. 106 (20): 8157–8162. Bibcode:2009PNAS..106.8157A. doi:10.1073/pnas.0901931106. PMC 2688859. PMID 19420222.
- Hong H, Cai Y, Zhang S, Ding H, Wang H, Han A (April 2017). "Molecular Basis of Substrate Specific Acetylation by N-Terminal Acetyltransferase NatB". Structure. 25 (4): 641–649.e3. doi:10.1016/j.str.2017.03.003. PMID 28380339.
- ^ Van Damme P, Lasa M, Polevoda B, Gazquez C, Elosegui-Artola A, Kim DS, et al. (July 2012). "N-terminal acetylome analyses and functional insights of the N-terminal acetyltransferase NatB". Proceedings of the National Academy of Sciences of the United States of America. 109 (31): 12449–12454. Bibcode:2012PNAS..10912449V. doi:10.1073/pnas.1210303109. PMC 3412031. PMID 22814378.
External links
- Acetyltransferases at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
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