5L8J

Aurora-A kinase domain in complex with vNAR-D01 S93R

5L8J の概要

• エントリーDOI: 10.2210/pdb5l8j/pdb
• 分子名称: Aurora kinase A, New antigen receptor variable domain, ADENOSINE-5'-DIPHOSPHATE, ... (6 entities in total)
• 機能のキーワード: kinase, vnar, inhibitor, transferase
• 由来する生物種: Homo sapiens (Human); 詳細
• 細胞内の位置: Cytoplasm, cytoskeleton, microtubule organizing center, centrosome : O14965
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 46564.53

構造登録者

Burgess, S.G.,Bayliss, R. (登録日: 2016-06-08, 公開日: 2016-07-20, 最終更新日: 2024-01-10)

主引用文献

Burgess, S.G.,Oleksy, A.,Cavazza, T.,Richards, M.W.,Vernos, I.,Matthews, D.,Bayliss, R.
Allosteric inhibition of Aurora-A kinase by a synthetic vNAR domain.
Open Biology, 6:-, 2016

PubMed Abstract: The vast majority of clinically approved protein kinase inhibitors target the ATP-binding pocket directly. Consequently, many inhibitors have broad selectivity profiles and most have significant off-target effects. Allosteric inhibitors are generally more selective, but are difficult to identify because allosteric binding sites are often unknown or poorly characterized. Aurora-A is activated through binding of TPX2 to an allosteric site on the kinase catalytic domain, and this knowledge could be exploited to generate an inhibitor. Here, we generated an allosteric inhibitor of Aurora-A kinase based on a synthetic, vNAR single domain scaffold, vNAR-D01. Biochemical studies and a crystal structure of the Aurora-A/vNAR-D01 complex show that the vNAR domain overlaps with the TPX2 binding site. In contrast with the binding of TPX2, which stabilizes an active conformation of the kinase, binding of the vNAR domain stabilizes an inactive conformation, in which the αC-helix is distorted, the canonical Lys-Glu salt bridge is broken and the regulatory (R-) spine is disrupted by an additional hydrophobic side chain from the activation loop. These studies illustrate how single domain antibodies can be used to characterize the regulatory mechanisms of kinases and provide a rational basis for structure-guided design of allosteric Aurora-A kinase inhibitors.

PubMed: 27411893
DOI: 10.1098/rsob.160089

実験手法

X-RAY DIFFRACTION (1.68 Å)