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Acetyltransferase

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(Redirected from Acetyltransferases) Class of enzymes
  • 3D structure of histone acetyltransferase 3D structure of histone acetyltransferase

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

Table 1: Types of acetyltransferases found in humans
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 histone acetyltransferase
  • 3D Structure of choline acetyltransferase 3D Structure of choline acetyltransferase
  • 3D structure of serotonin N-acetyltransferase 3D structure of serotonin N-acetyltransferase

See also

References

  1. ^ 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.
  2. ^ 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.
  3. ^ 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.
  4. ^ 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.
  5. ^ 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.
  6. ^ 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.
  7. 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.
  8. ^ 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

Transferases: acyltransferases (EC 2.3)
2.3.1: other than amino-acyl groups
2.3.2: Aminoacyltransferases
2.3.3: converted into alkyl on transfer
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