6hk6
Human RIOK2 bound to inhibitorHuman RIOK2 bound to inhibitor
Structural highlights
Function[RIOK2_HUMAN] Serine/threonine-protein kinase involved in the final steps of cytoplasmic maturation of the 40S ribosomal subunit. Involved in export of the 40S pre-ribosome particles (pre-40S) from the nucleus to the cytoplasm. Its kinase activity is required for the release of NOB1, PNO1 and LTV1 from the late pre-40S and the processing of 18S-E pre-rRNA to the mature 18S rRNA (PubMed:19564402). Regulates the timing of the metaphase-anaphase transition during mitotic progression, and its phosphorylation, most likely by PLK1, regulates this function (PubMed:21880710).[1] [2] [3] Publication Abstract from PubMedThe RIO kinases (RIOKs) are a universal family of atypical kinases that are essential for assembly of the pre-40S ribosome complex. Here, we present the crystal structure of human RIO kinase 2 (RIOK2) bound to a specific inhibitor. This first crystal structure of an inhibitor-bound RIO kinase reveals the binding mode of the inhibitor and explains the structure-activity relationship of the inhibitor series. The inhibitor binds in the ATP-binding site and forms extensive hydrophobic interactions with residues at the entrance to the ATP-binding site. Analysis of the conservation of active site residues reveals the reasons for the specificity of the inhibitor for RIOK2 over RIOK1 and RIOK3, and it provides a template for inhibitor design against the human RIOK family. Crystal structure of human RIOK2 bound to a specific inhibitor.,Wang J, Varin T, Vieth M, Elkins JM Open Biol. 2019 Apr 26;9(4):190037. doi: 10.1098/rsob.190037. PMID:30991936[4] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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