Histone acetyltransferase

Relative sizes and locations of important domains for representative HATs (HAT = catalytic acetyltransferase domain; Bromo = bromodomain; Chromo = chromodomain; Zn = zinc finger domain). The number of amino acid residues in each HAT is indicated at the right in each example.

Crystal structure of Tetrahymena Gcn5 with bound coenzyme A and histone H3 peptide (PDB 1QSN). The central core (green), flanking N- and C-terminal segments (blue), coenzyme A (orange), and histone peptide (red) are shown.

Catalytic mechanisms of GNAT and MYST family HATs. (A) General mechanism of GNAT HATs. (B) General mechanism of MYST HATs.

Schematic showing the role of HATs in gene transcription.

Histone acetyltransferases (HATs) are enzymes that acetylate conserved lysine amino acids on histone proteins by transferring an acetyl group from acetyl CoA to form ε-N-acetyllysine. DNA is wrapped around histones, and, by transferring an acetyl group to the histones, genes can be turned on and off. In general, histone acetylation increases gene expression.

单词	Histone acetyltransferase
释义	Histone acetyltransferase 英语百科 Histone acetyltransferase Histone acetyltransferases (HATs) are enzymes that acetylate conserved lysine amino acids on histone proteins by transferring an acetyl group from acetyl CoA to form ε-N-acetyllysine. DNA is wrapped around histones, and, by transferring an acetyl group to the histones, genes can be turned on and off. In general, histone acetylation increases gene expression.
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