3U9C

Structure of a C-terminal deletion mutant of human protein kinase CK2 catalytic subunit with the ATP-competitive inhibitor resorufin

3U9C の概要

• エントリーDOI: 10.2210/pdb3u9c/pdb
• 関連するPDBエントリー: 1JWH 2PVR 3OFM 3U87
• 分子名称: Casein kinase II subunit alpha, SULFATE ION, 7-hydroxy-3H-phenoxazin-3-one, ... (6 entities in total)
• 機能のキーワード: protein kinase ck2 casein kinase 2, eukaryotic protein kinase fold, atp:protein phosphotransferase, protein kinase, atp ck2beta, transferase-transferase inhibitor complex, transferase/transferase inhibitor
• 由来する生物種: Homo sapiens (human)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 81728.23

構造登録者

Klopffleisch, K.,Issinger, O.-G.,Niefind, K. (登録日: 2011-10-18, 公開日: 2012-05-30, 最終更新日: 2023-09-13)

主引用文献

Klopffleisch, K.,Issinger, O.G.,Niefind, K.
Low-density crystal packing of human protein kinase CK2 catalytic subunit in complex with resorufin or other ligands: a tool to study the unique hinge-region plasticity of the enzyme without packing bias.
Acta Crystallogr.,Sect.D, 68:883-892, 2012

PubMed Abstract: A low-resolution structure of the catalytic subunit CK2α of human protein kinase CK2 (formerly known as casein kinase 2) in complex with the ATP-competitive inhibitor resorufin is presented. The structure supplements previous human CK2α structures in which the interdomain hinge/helix αD region adopts a closed conformation correlating to a canonically established catalytic spine as is typical for eukaryotic protein kinases. In the corresponding crystal packing the hinge/helix αD region is nearly unaffected by crystal contacts, so that largely unbiased conformational adaptions are possible. This is documented by published human CK2α structures with the same crystal packing but with an open hinge/helix αD region, one of which has been redetermined here with a higher symmetry. An overview of all published human CK2α crystal packings serves as the basis for a discussion of the factors that determine whether the open or the closed hinge/helix αD conformation is adopted. Lyotropic salts in crystallization support the closed conformation, in which the Phe121 side chain complements the hydrophobic catalytic spine ensemble. Consequently, genuine ligand effects on the hinge/helix αD conformation can be best studied under moderate salt conditions. Ligands that stabilize either the open or the closed conformation by hydrogen bonds are known, but a general rule is not yet apparent.

PubMed: 22868753
DOI: 10.1107/S0907444912016587

実験手法

X-RAY DIFFRACTION (3.2 Å)