Protein-protein Interactions Between Intermediate Chains and the Docking Complex of Chlamydomonas Flagellar Outer Arm Dynein
Overview
Affiliations
Outer arm dynein (OAD) is bound to specific loci on outer-doublet-microtubules by interactions at two sites: via intermediate chain 1 (IC1) and the outer dynein arm docking complex (ODA-DC). Studies using Chlamydomonas mutants have suggested that the individual sites have rather weak affinities for microtubules, and therefore strong OAD attachment to microtubules is achieved by their cooperation. To test this idea, we examined interactions between IC1, IC2 (another intermediate chain) and ODA-DC using recombinant proteins. Recombinant IC1 and IC2 were found to form a 1:1 complex, and this complex associated with ODA-DC in vitro. Binding of IC1 to mutant axonemes revealed that there are specific binding sites for IC1. From these data, we propose a novel model of OAD-outer doublet association.
Cytoplasmic preassembly of the flagellar outer dynein arm complex in .
Balasubramaniam K, He T, Chen H, Lin Z, He C Mol Biol Cell. 2024; 35(9):br16.
PMID: 39024276 PMC: 11449384. DOI: 10.1091/mbc.E24-06-0263.
Penny G, Dutcher S PLoS Genet. 2024; 20(3):e1011038.
PMID: 38498551 PMC: 11020789. DOI: 10.1371/journal.pgen.1011038.
Homozygous mutation in leads to asthenoteratozoospermia by affecting the inner dynein arms.
Sha Y, Liu W, Nie H, Han L, Ma C, Zhang X Front Endocrinol (Lausanne). 2023; 13:1058651.
PMID: 36726469 PMC: 9885801. DOI: 10.3389/fendo.2022.1058651.
Structure of a microtubule-bound axonemal dynein.
Walton T, Wu H, Brown A Nat Commun. 2021; 12(1):477.
PMID: 33473120 PMC: 7817835. DOI: 10.1038/s41467-020-20735-7.
Kyuji A, Patel-King R, Hisabori T, King S, Wakabayashi K Zoolog Sci. 2020; 37(1):7-13.
PMID: 32068369 PMC: 7034577. DOI: 10.2108/zs190082.