Scientists have discovered the molecular basis for the ultrafast contraction of Spirostomum, a genus of millimeter-scale single-celled protists known for their incredibly rapid movement. Using a high-quality genome obtained from RNAi, the researchers found that the contractile structure, a mesh-like
contractile fibrillar system, was composed of two giant proteins and two Ca2+ binding proteins. This study is significant for understanding the molecular mechanism of ultrafast cell contraction and provides a blueprint for the design and construction of ultrafast contractile micromachines.
In his famous letter to the Royal Society dated October 9, 1676, Antonie van Leeuwenhoek described a single-celled eukaryote and its fascinating ultrafast cell contraction as the first set of discoveries. This kind of ultrafast cell contraction triggered by a Ca-dependent mechanism is distinct from the adenosine triphosphate -dependent mechanisms found in actin-myosin and dynein/kinesin-tubulin systems.
Recently, a research group led by Prof. MIAO Wei from the Institute of Hydrobiology of the Chinese Academy of Sciences has unlocked this mystery by describing the molecular basis behind the ultrafast contraction ofIn this study, the researchers obtained a high-quality genome ofusing a genome assembly pipeline they had previously established.
This study is highly significant for understanding the molecular mechanism of ultrafast cell contraction and provides a good blueprint for the biomimicry, design, and construction of ultrafast contractile micromachines.
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