Myosin VI is a member of a superfamily of actin-based motors with at least 18 different sub-types or classes. Myosins are best known as proteins that use ATP-hydrolysis-mediated conformational changes to move along actin filaments. Because of this property, some myosins, including myosins I, V, and VI, are thought to be transporters of vesicle or protein cargoes. Myosin VI has been implicated in many seemingly different processes through functional studies in flies, worms and mammals. In several cases, its role is not easily explained by transport along actin. In addition, some of the biochemical and biophysical properties of myosin VI suggest other mechanisms of action. In this review, we summarize recent data that suggest diverse functions for myosin VI and offer an explanation for how myosin VI may function similarly in all of them. We hypothesize that the main function of myosin VI is to bind tightly to actin, stabilizing actin cytoskeletal structures and linking actin structures to membranes and protein complexes.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.ceb.2004.02.001DOI Listing

Publication Analysis

Top Keywords

myosin
7
actin
6
myosin structural
4
structural role
4
role actin
4
actin organization
4
organization protein
4
protein organelle
4
organelle localization
4
localization trafficking
4

Similar Publications

Hsf1 is essential for proteotoxic stress response in smyd1b-deficient embryos and fish survival under heat shock.

FASEB J

January 2025

Department of Biochemistry and Molecular Biology, Institute of Marine and Environmental Technology, University of Maryland School of Medicine, Baltimore, Maryland, USA.

Molecular chaperones play critical roles in post-translational maintenance in protein homeostasis. Previous studies have shown that loss of Smyd1b function results in defective myofibril organization and dramatic upregulation of heat shock protein gene (hsp) expression in muscle cells of zebrafish embryos. To investigate the molecular mechanisms and functional importance of this stress response, we characterized changes of gene expression in smyd1b knockdown and knockout embryos using RNA-seq.

View Article and Find Full Text PDF

The number of beef × dairy animals entering feedlots has increased, but the response of beef × dairy cattle to growth-promoting implants has not been well characterized. The objective of this study was to evaluate the effects of breed type and implant administration on live performance, carcass characteristics, sera metabolites, and immunohistochemical (IHC) outcomes. Forty-eight steers (average body weight [BW] = 417±22 kg) were sorted by breed into groups of predominantly Angus (B), black-hided beef × primarily Holstein (B×D), or Holstein (D), and half of the steers within each breed type were administered a steroidal implant.

View Article and Find Full Text PDF

Different edible portions including meat (lump, claw and backfin) and roe of blue swimming crab () were analyzed. Both meat and roe had high protein content, but a greater fat content was found in roe. All meats showed higher levels of polyunsaturated fatty acids than roe.

View Article and Find Full Text PDF

Introduction: Laryngeal muscle physiology is integral to many speech, voice, swallowing, and respiratory functions. A key determinant of a muscle's contractile properties, including its fatigue profile and capacity for force production, is the myosin heavy chain (MyHC) isoform that predominates in the muscle. This study surveys literature on the MyHC compositions of mammalian intrinsic laryngeal skeletal muscle to illustrate trends and gaps in laryngeal muscle fiber typing techniques, models, and concepts.

View Article and Find Full Text PDF

Dioixn-like effects of an emerging contaminant 1,3,6,8-tetrabromocarbazole on the myogenic differentiation of mouse C2C12 cells.

Environ Res

January 2025

State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China. Electronic address:

1,3,6,8-Tetrabromocarbazole (1368-BCZ) has been proposed as an emerging environmental contaminant which has aryl hydrocarbon receptor (AhR) activating properties analogous to those of dioxins. Skeletal muscle development is a critical target of dioxin toxicity. However, the impact of 1368-BCZ on muscle development is inadequately understood.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!