PMID- 36608736 OWN - NLM STAT- MEDLINE DCOM- 20230210 LR - 20240501 IS - 1873-3913 (Electronic) IS - 0898-6568 (Linking) VI - 104 DP - 2023 Apr TI - From phosphorylation to phenotype - Recent key findings on kinase regulation, downstream signaling and disease surrounding the receptor tyrosine kinase MuSK. PG - 110584 LID - S0898-6568(22)00346-1 [pii] LID - 10.1016/j.cellsig.2022.110584 [doi] AB - Muscle-specific kinase (MuSK) is the key regulator of neuromuscular junction development. MuSK acts via several distinct pathways and is responsible for pre- and postsynaptic differentiation. MuSK is unique among receptor tyrosine kinases as activation and signaling are particularly tightly regulated. Initiation of kinase activity requires Agrin, a heparan sulphate proteoglycan derived from motor neurons, the low-density lipoprotein receptor-related protein-4 (Lrp4) and the intracellular adaptor protein Dok-7. There is a great knowledge gap between MuSK activation and downstream signaling. Recent studies using omics techniques have addressed this knowledge gap, thereby greatly contributing to a better understanding of MuSK signaling. Impaired MuSK signaling causes severe muscle weakness as described in congenital myasthenic syndromes or myasthenia gravis but the underlying pathophysiology is often unclear. This review focuses on recent advances in deciphering MuSK activation and downstream signaling. We further highlight latest break-throughs in understanding and treatment of MuSK-related disorders and discuss the role of MuSK in non-muscle tissue. CI - Copyright (c) 2023 The Authors. Published by Elsevier Inc. All rights reserved. FAU - Promer, Jakob AU - Promer J AD - Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria. FAU - Barresi, Cinzia AU - Barresi C AD - Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria. FAU - Herbst, Ruth AU - Herbst R AD - Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria. Electronic address: ruth.herbst@meduniwien.ac.at. LA - eng GR - DOC 33/FWF_/Austrian Science Fund FWF/Austria GR - P 31199/FWF_/Austrian Science Fund FWF/Austria PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20230103 PL - England TA - Cell Signal JT - Cellular signalling JID - 8904683 RN - 0 (Receptors, Cholinergic) RN - 0 (LDL-Receptor Related Proteins) RN - 0 (Muscle Proteins) RN - EC 2.7.10.1 (Receptor Protein-Tyrosine Kinases) SB - IM MH - Phosphorylation MH - *Neuromuscular Junction/genetics/metabolism MH - *Receptors, Cholinergic/genetics/metabolism MH - LDL-Receptor Related Proteins/genetics MH - Muscle Proteins/metabolism MH - Receptor Protein-Tyrosine Kinases/metabolism OTO - NOTNLM OT - Agrin OT - MuSK OT - Neuromuscular disorders OT - Neuromuscular junction OT - Skeletal muscle COIS- Declaration of Competing Interest The authors declare no competing financial or non-financial interests. EDAT- 2023/01/08 06:00 MHDA- 2023/02/11 06:00 CRDT- 2023/01/07 16:02 PHST- 2022/11/18 00:00 [received] PHST- 2022/12/16 00:00 [revised] PHST- 2022/12/31 00:00 [accepted] PHST- 2023/01/08 06:00 [pubmed] PHST- 2023/02/11 06:00 [medline] PHST- 2023/01/07 16:02 [entrez] AID - S0898-6568(22)00346-1 [pii] AID - 10.1016/j.cellsig.2022.110584 [doi] PST - ppublish SO - Cell Signal. 2023 Apr;104:110584. doi: 10.1016/j.cellsig.2022.110584. Epub 2023 Jan 3.