2RC4

Crystal Structure of the HAT domain of the human MOZ protein

2RC4 の概要

• エントリーDOI: 10.2210/pdb2rc4/pdb
• 分子名称: Histone acetyltransferase MYST3, ZINC ION, ACETYL COENZYME *A, ... (4 entities in total)
• 機能のキーワード: coenzyme a binding domain, zinc-finger, helix-turn-helix, activator, acyltransferase, chromatin regulator, metal-binding, nucleus, phosphorylation, proto-oncogene, repressor, transcription, transcription regulation, transferase
• 由来する生物種: Homo sapiens (human)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 34896.62

構造登録者

Holbert, M.A.,Sikorski, T.,Snowflack, D.,Marmorstein, R. (登録日: 2007-09-19, 公開日: 2007-11-13, 最終更新日: 2024-02-21)

主引用文献

Holbert, M.A.,Sikorski, T.,Carten, J.,Snowflack, D.,Hodawadekar, S.,Marmorstein, R.
The human monocytic leukemia zinc finger histone acetyltransferase domain contains DNA-binding activity implicated in chromatin targeting.
J.Biol.Chem., 282:36603-36613, 2007

PubMed Abstract: The human monocytic leukemia zinc finger (MOZ) protein is an essential transcriptional coactivator and histone acetyltransferase (HAT) that plays a primary role in the differentiation of erythroid and myeloid cells and is required to maintain hematopoietic stem cells. Chromosomal translocations involving the HAT-encoded region are also associated with acute myeloid leukemia. Here we present the x-ray crystal structure of the MOZ HAT domain and related biochemical studies. We find that the HAT domain contains a central region that is structurally and functionally conserved with the yeast MYST HAT protein Esa1, but contains more divergent N- and C-terminal regions harboring a TFIIIA-type zinc finger and helix-turn-helix DNA-binding motifs. Solution DNA-binding and acetyltransferase activity assays, in concert with mutagenesis, confirm that the MOZ HAT domain binds strongly to DNA through the zinc finger and helix-turn-helix motifs and that DNA binding and catalysis are not mutually exclusive. Consistent with the DNA-binding properties of MOZ, we also show that MOZ is able to acetylate nucleosomes and free histones equally well, whereas other HATs prefer free histones. Our results reveal, for the first time, that enzymatic and DNA-targeting activities can be contained within the same chromatin regulatory domain.

PubMed: 17925393
DOI: 10.1074/jbc.M705812200

実験手法

X-RAY DIFFRACTION (3 Å)