3WAR

Crystal structure of human CK2a

3WAR の概要

• エントリーDOI: 10.2210/pdb3war/pdb
• 分子名称: Casein kinase II subunit alpha, NICOTINIC ACID, 1,2-ETHANEDIOL, ... (4 entities in total)
• 機能のキーワード: protein kinase, 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: 41780.59

構造登録者

Kinoshita, T.,Nakaniwa, T.,Sekiguchi, Y.,Sogabe, Y.,Sakurai, A.,Nakamura, S.,Nakanishi, I. (登録日: 2013-05-07, 公開日: 2013-10-30, 最終更新日: 2024-03-20)

主引用文献

Kinoshita, T.,Nakaniwa, T.,Sekiguchi, Y.,Sogabe, Y.,Sakurai, A.,Nakamura, S.,Nakanishi, I.
Crystal structure of human CK2 alpha at 1.06 angstrom resolution
J.SYNCHROTRON RADIAT., 20:974-979, 2013

PubMed Abstract: The Ser/Thr kinase CK2 consists of two catalytic subunits (CK2α) and a dimer of the regulatory subunits (CK2β), and is a ubiquitous enzyme that regulates growth, proliferation and the survival of cells. CK2 is a remarkable drug target for potentially treating a wide variety of tumours and glomerulonephritis. The purified CK2α protein was crystallized using ethylene glycol as a precipitant. The crystal structure of CK2α with 21 loci of alternative conformations, including a niacin, 19 ethylene glycols and 346 waters, was determined at 1.06 Å resolution to an Rwork of 14.0% (Rfree = 16.5%). The alternative ensemble in the internal hydrophobic core underpins the plasticity of the αD-helix responsible for the regulation of ATP/GTP binding. The clear density map indicates that a niacin molecule, contained in the Escherichia coli culture medium, binds to the ATP binding site. An ethylene glycol molecule binds in the hydrophobic pocket lateral to the αD-helix forming the rim of the active site. The other ethylene glycol molecules occupy physiologically significant sites, including the CK2β binding interface and substrate binding site, as well as the gap in the crystal packing. Together with water molecules in the active site, these structural insights should facilitate drug discovery.

PubMed: 24121351
DOI: 10.1107/S0909049513020785

実験手法

X-RAY DIFFRACTION (1.04 Å)