Functional domains in dynein ICs. The IC140 is
shown diagramatically in comparison to other dynein ICs. The shaded
boxes indicate WD repeats; the double loops indicate predicted
coiled-coil regions, and the asterisks denote WD repeats that have been
implicated in subunit interactions (redrawn following Yang and Sale,
1998). IC78 is the outer arm IC that has been implicated in binding to
the axoneme (see MT regions indicated, King et al.,
1995). IC69 is another IC required for outer arm assembly (Mitchell and
Kang, 1991). Mutations in the N-terminal region can alter flagellar
beat frequency (see BF, Mitchell and Kang, 1993). IC2C (IC74) is a
cytoplasmic dynein IC that appears to mediate interaction with the
p150glued subunit of the dynactin complex (see p150,
Vaughan and Vallee, 1995; Steffen et al., 1997).