3LJ8

Crystal Structure of MKP-4

3LJ8 の概要

• エントリーDOI: 10.2210/pdb3lj8/pdb
• 分子名称: Tyrosine-protein phosphatase (1 entity in total)
• 機能のキーワード: alpha/beta hydrolase, hydrolase, protein phosphatase
• 由来する生物種: Homo sapiens (human)
• 細胞内の位置: Cytoplasm: Q99956
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 16652.03

構造登録者

Jeong, D.G.,Yoon, T.S.,Jung, S.-K.,Park, H.S.,Ryu, S.E.,Kim, S.J. (登録日: 2010-01-26, 公開日: 2010-12-29, 最終更新日: 2023-11-01)

主引用文献

Jeong, D.G.,Yoon, T.S.,Jung, S.-K.,Park, B.C.,Park, H.S.,Ryu, S.E.,Kim, S.J.
Exploring binding sites other than the catalytic core in the crystal structure of the catalytic domain of MKP-4
Acta Crystallogr.,Sect.D, 67:25-31, 2011

PubMed Abstract: Map kinase phosphatase 4 (MKP-4), which has been implicated in signalling pathways that negatively regulate glucose uptake, belongs to the dual-specificity phosphatase (DUSP) family. An inherent property of MKPs is an ability to undergo structural rearrangement, transitioning from a partially active to a fully active conformation. Here, a 2.7 Å resolution crystal structure of the catalytic domain of MKP-4 (MKP-4C) is presented. It was determined that the MKP-4C structure seriously deviates from canonical conformations of DUSPs and this characteristic feature results in significant gaps between the catalytic core and several surrounding loops which are unique compared with other MKP counterparts that adopt an active conformation. Using virtual library screening, it was found that inhibitors bind to MKP-4C with high affinity near these gaps. Inhibitors that target other binding sites instead of the active site can be utilized to prevent transition to a fully active conformation. Compounds that are able to make contacts with these sites in MKP-4 would not only provide a beneficial increase in affinity but may also permit greater specificity relative to other protein tyrosine phosphatases.

PubMed: 21206059
DOI: 10.1107/S0907444910042381

実験手法

X-RAY DIFFRACTION (2.7 Å)