PMID- 25376491 OWN - NLM STAT- MEDLINE DCOM- 20150701 LR - 20191210 IS - 1937-6448 (Print) IS - 1937-6448 (Linking) VI - 313 DP - 2014 TI - The UNC-45 myosin chaperone: from worms to flies to vertebrates. PG - 103-44 LID - B978-0-12-800177-6.00004-9 [pii] LID - 10.1016/B978-0-12-800177-6.00004-9 [doi] AB - UNC-45 (uncoordinated mutant number 45) is a UCS (UNC-45, CRO1, She4p) domain protein that is critical for myosin stability and function. It likely aides in folding myosin during cellular differentiation and maintenance, and protects myosin from denaturation during stress. Invertebrates have a single unc-45 gene that is expressed in both muscle and nonmuscle tissues. Vertebrates possess one gene expressed in striated muscle (unc-45b) and another that is more generally expressed (unc-45a). Structurally, UNC-45 is composed of a series of alpha-helices connected by loops. It has an N-terminal tetratricopeptide repeat domain that binds to Hsp90 and a central domain composed of armadillo repeats. Its C-terminal UCS domain, which is also comprised of helical armadillo repeats, interacts with myosin. In this chapter, we present biochemical, structural, and genetic analyses of UNC-45 in Caenorhabditis elegans, Drosophila melanogaster, and various vertebrates. Further, we provide insights into UNC-45 functions, its potential mechanism of action, and its roles in human disease. FAU - Lee, Chi F AU - Lee CF AD - Department of Biology, San Diego State University, San Diego, CA, USA. FAU - Melkani, Girish C AU - Melkani GC AD - Department of Biology, San Diego State University, San Diego, CA, USA. FAU - Bernstein, Sanford I AU - Bernstein SI AD - Department of Biology, San Diego State University, San Diego, CA, USA. LA - eng GR - R01 AR055958/AR/NIAMS NIH HHS/United States GR - 5R01AR055958/AR/NIAMS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Review PL - Netherlands TA - Int Rev Cell Mol Biol JT - International review of cell and molecular biology JID - 101475846 RN - 0 (Caenorhabditis elegans Proteins) RN - 0 (Drosophila Proteins) RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (Molecular Chaperones) RN - 0 (Muscle Proteins) RN - 0 (UNC-45 protein, Drosophila) RN - 0 (Unc45 protein, mouse) RN - 0 (Unc45b protein, zebrafish) RN - 0 (Xenopus Proteins) RN - 0 (Zebrafish Proteins) RN - 0 (unc-45 protein, C elegans) RN - EC 3.6.4.1 (Myosins) SB - IM MH - Amino Acid Sequence MH - Animals MH - Caenorhabditis elegans/genetics/*metabolism MH - Caenorhabditis elegans Proteins/chemistry/genetics/*metabolism MH - Crystallography, X-Ray MH - Drosophila Proteins/chemistry/genetics/metabolism MH - Drosophila melanogaster/genetics/*metabolism MH - Humans MH - Intracellular Signaling Peptides and Proteins/chemistry/genetics/metabolism MH - Mice MH - Models, Molecular MH - Molecular Chaperones/chemistry/genetics/*metabolism MH - Molecular Sequence Data MH - Muscle Proteins MH - Mutation MH - Myosins/*metabolism MH - Protein Conformation MH - Protein Interaction Domains and Motifs MH - Structure-Activity Relationship MH - Xenopus/genetics/metabolism MH - Xenopus Proteins/genetics/metabolism MH - Zebrafish/genetics/metabolism MH - Zebrafish Proteins/chemistry/genetics/metabolism PMC - PMC4225561 MID - NIHMS632140 OTO - NOTNLM OT - Chaperone OT - Hsp90 OT - Muscle OT - Myosin OT - TPR domain OT - UCS protein OT - UNC-45 EDAT- 2014/11/08 06:00 MHDA- 2015/07/02 06:00 PMCR- 2015/01/01 CRDT- 2014/11/08 06:00 PHST- 2014/11/08 06:00 [entrez] PHST- 2014/11/08 06:00 [pubmed] PHST- 2015/07/02 06:00 [medline] PHST- 2015/01/01 00:00 [pmc-release] AID - B978-0-12-800177-6.00004-9 [pii] AID - 10.1016/B978-0-12-800177-6.00004-9 [doi] PST - ppublish SO - Int Rev Cell Mol Biol. 2014;313:103-44. doi: 10.1016/B978-0-12-800177-6.00004-9.