A centrin-Sfi1 myoneme fishnet powers ultrafast calcium-triggered contraction in the giant ciliate Spirostomum ambiguum
Joseph Lannan, Carlos Floyd, L. X. Xu, Peter M. Thompson, Connie Yan, Wallace F. Marshall, Suriyanarayanan Vaikuntanathan, Aaron R. Dinner, Jerry E. Honts, M. Saad Bhamla, Mary Williard Elting
This paper investigates ultrafast contraction in Spirostomum using myonemes, showing centrin-Sfi1 structures drive calcium-triggered contraction without actomyosin or ATP.
Proceedings of the National Academy of Sciences · May 29, 2026Peer-reviewedCell Biology