PMID- 24018050 OWN - NLM STAT- MEDLINE DCOM- 20141203 LR - 20211203 IS - 1873-3913 (Electronic) IS - 0898-6568 (Linking) VI - 25 IP - 12 DP - 2013 Dec TI - RIO kinase 3 acts as a SUFU-dependent positive regulator of Hedgehog signaling. PG - 2668-75 LID - S0898-6568(13)00274-X [pii] LID - 10.1016/j.cellsig.2013.08.037 [doi] AB - Suppressor of fused (SUFU) is an essential negative regulator of the mammalian Hedgehog (HH) signaling pathway and its loss is associated with cancer development. On a cellular level, endogenous SUFU can mainly be detected in the cytoplasm and the nucleus. However, immunostaining of pancreatic cancer specimen revealed the existence of cell types showing selective enrichment of endogenous SUFU in the nucleus. Following up on this observation, we found that a SUFU construct which was experimentally tethered exclusively to the nucleus was unable to antagonize endogenous HH signaling, in contrast to control SUFU. These data suggest that alterations in the normal subcellular distribution of SUFU might interfere with its established negative role on the HH pathway. Performing a multi-well kinase screen in human cells identified RIO kinase 3 (RIOK3) as a novel modulator of SUFU subcellular distribution. Functionally, RIOK3 acts as a SUFU-dependent positive regulator of HH signaling. Taken together, we propose that factors modulating the nucleo-cytoplasmic distribution of SUFU impact on the normal function of this tumor suppressing protein. CI - (c) 2013. FAU - Tariki, Melanie AU - Tariki M AD - Philipps University, Institute of Molecular Biology and Tumor Research (IMT), Emil-Mannkopff-Str. 2, 35037 Marburg, Germany. FAU - Wieczorek, Sarah Alexandra AU - Wieczorek SA FAU - Schneider, Philipp AU - Schneider P FAU - Banfer, Sebastian AU - Banfer S FAU - Veitinger, Sophie AU - Veitinger S FAU - Jacob, Ralf AU - Jacob R FAU - Fendrich, Volker AU - Fendrich V FAU - Lauth, Matthias AU - Lauth M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130907 PL - England TA - Cell Signal JT - Cellular signalling JID - 8904683 RN - 0 (Hedgehog Proteins) RN - 0 (Repressor Proteins) RN - 0 (SUFU protein, human) RN - EC 2.7.11.1 (Protein Serine-Threonine Kinases) RN - EC 2.7.11.1 (RIO kinase 3, human) SB - IM MH - Animals MH - COS Cells MH - Cell Nucleolus/metabolism MH - Chlorocebus aethiops MH - HEK293 Cells MH - Hedgehog Proteins/*metabolism MH - Humans MH - Mice MH - NIH 3T3 Cells MH - Protein Serine-Threonine Kinases/*metabolism MH - Repressor Proteins/analysis/*metabolism MH - *Signal Transduction OTO - NOTNLM OT - GLI OT - GLI1 OT - HH OT - Hedgehog OT - RIOK3 OT - SHH OT - SUFU OT - Signal transduction OT - glioma-associated oncogene 1 OT - hedgehog OT - right open reading frame kinase 3 OT - sonic hedgehog OT - suppressor of fused EDAT- 2013/09/11 06:00 MHDA- 2014/12/15 06:00 CRDT- 2013/09/11 06:00 PHST- 2013/08/20 00:00 [received] PHST- 2013/08/30 00:00 [accepted] PHST- 2013/09/11 06:00 [entrez] PHST- 2013/09/11 06:00 [pubmed] PHST- 2014/12/15 06:00 [medline] AID - S0898-6568(13)00274-X [pii] AID - 10.1016/j.cellsig.2013.08.037 [doi] PST - ppublish SO - Cell Signal. 2013 Dec;25(12):2668-75. doi: 10.1016/j.cellsig.2013.08.037. Epub 2013 Sep 7.