Substructure of inner dynein arms, radial spokes, and the central pair/projection complex of cilia and flagella

The substructure of the components of the axoneme interior--the inner dynein arms, the radial spokes, and the central pair/projection complex- -was analyzed for Chlamydomonas. Tetrahymena, Strongelocentrotus, and Mnemiopsis using the quick-freeze, deep-etch technique. The inner arms are shown to resemble the outer arms in overall molecular organization, but they are disposed differently on the microtubule and have two distinct morphologies--dyads with two heads and triads with three. The dyads associate with spokes S3 and S2; the triads associate with S1. The spokes form a three-start right-handed helix with a 288-nm rise; the central pair makes a shallow left-handed twist. The spoke heads are shown to be made up of four major subunits; two bind to the spoke shaft and two bind to a pair of central-sheath projections.

• Publication year

  1985

• Venue

  Journal of Cell Biology

• Publication date

  1985-06-01

• Fields of study

  Biology, Medicine

• Identifiers
  DOI 10.1083/JCB.100.6.2008PMID 2860115PMCID 2113608
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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