dimerization/docking (D/D) domain of an uncharacterized subunit found in Chlamydomonas reinhardtii radial spoke 1
Flagellar radial spokes contribute to the regulation of dynein arm activity and thus the pattern of flagellar bending. They consist of a thin stalk, which is attached to a subfiber of the outer doublet microtubule, and a bulbous head, which is attached to the stalk and appears to interact with the projections from the central pair of microtubules. This subfamily includes an uncharacterized protein found in Chlamydomonas reinhardtii radial spoke 1. It contains a conserved domain that shows high sequence similarity to the dimerization/docking (D/D) domains of regulatory subunit of cAMP-dependent protein kinase (PKA) and protein DPY-30/SDC1.
Jiyao W et al.(2023). "The conserved domain database in 2023.",