3LJ8

Crystal Structure of MKP-4

Summary for 3LJ8

• Entry DOI: 10.2210/pdb3lj8/pdb
• Descriptor: Tyrosine-protein phosphatase (1 entity in total)
• Functional Keywords: alpha/beta hydrolase, hydrolase, protein phosphatase
• Biological source: Homo sapiens (human)
• Cellular location: Cytoplasm: Q99956
• Total number of polymer chains: 1
• Total formula weight: 16652.03

Authors

Jeong, D.G.,Yoon, T.S.,Jung, S.-K.,Park, H.S.,Ryu, S.E.,Kim, S.J. (deposition date: 2010-01-26, release date: 2010-12-29, Last modification date: 2023-11-01)

Primary citation

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

Experimental method

X-RAY DIFFRACTION (2.7 Å)