Erratum for Yamamoto et al., Novel 44-Kilodalton Subunit of Axonemal Dynein Conserved from Chlamydomonas to Mammals.

Novel 44-Kilodalton Subunit of Axonemal Dynein Conserved from Chlamydomonas to Mammals

The MIA complex is a conserved and novel dynein regulator essential for normal ciliary motility

Axonemal dyneins must be precisely regulated and coordinated to produce ordered ciliary/flagellar motility, but how this is achieved is not understood. We analyzed two Chlamydomonas reinhardtii mutants, mia1 and mia2, which display slow swimming and low flagellar beat frequency. We found that the MIA1 and MIA2 genes encode conserved coiled-coil proteins, FAP100 and FAP73, respectively, which fo...

Big steps toward understanding dynein

It has been 50 years since dynein was discovered and named by Ian Gibbons as a motor protein that drives cilia/flagella bending (Gibbons, 1963; Gibbons and Rowe, 1965). In the mid-1980s, dynein was also found to power retrograde transport in neurons (Paschal and Vallee, 1987). Subsequently, the primary amino acid sequence of the cytoplasmic dynein heavy chain, which contains the motor domain, w...

Discrete PIH proteins function in the cytoplasmic preassembly of different subsets of axonemal dyneins

Axonemal dyneins are preassembled in the cytoplasm before being transported into cilia and flagella. Recently, PF13/KTU, a conserved protein containing a PIH (protein interacting with HSP90) domain, was identified as a protein responsible for dynein preassembly in humans and Chlamydomonas reinhardtii. This protein is involved in the preassembly of outer arm dynein and some inner arm dyneins, po...

Molecular analysis of the γ heavy chain of Chlamydomonas flagellar outer- arm dynein

We report here the complete sequence of the γ dynein heavy chain of the outer arm of the Chlamydomonas flagellum, and partial sequences for six other dynein heavy chains. The γ dynein heavy chain sequence contains four P-loop motifs, one of which is the likely hydrolytic site based on its position relative to a previously mapped epitope. Comparison with available cytoplasmic and flagellar dynei...