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- W168004080 abstract "The genetic disorder primary ciliary dyskinesia (PCD) arises from dysmotility of cilia in the respiratory tract, brain ventricles, oviduct and the embryonic node. Patients have chronic obstructive pulmonary disease, reduced fertility and situs abnormalities. PCD is genetically heterogeneous with 12 genes causing ~40% of all cases, two encoding proteins (KTU, LRRC50) involved in cytosolic axonemal dynein co-assembly. We have identified mutations in the C19ORF51 gene located within a previously mapped PCD locus. C19ORF51 encodes a protein orthologous to PF22, a Chlamydomonas protein involved in the cytoplasmic assembly of outer dynein arms preceeding their import into the axoneme. Chlamydomonas pf22 cells display a disturbance in their cytoplasm of dynein heavy chain stabilityand the co-assembly of heavy with intermediate chains, both essential for dynein arm assembly. PF22 appears to act downstream of KTU and LRRC50 in the dynein preassembly pathway. PF22 knockdown in zebrafish causes a loss of dynein arms, cilia dysmotility, and a typical ciliopathy phenotype with axis curvature, pronephric cysts, hydrocephalus and situs inversus. We propose the existance of a conserved multi-step pathway for formation of assembly-competent dynein complexes, and that PF22 (now renamed DNAAF3, “dynein axonemal assembly factor 3”) mutations cause PCD with situs inversus due to deficient cytoplasmic dynein assembly." @default.
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- W168004080 date "2012-11-01" @default.
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- W168004080 title "Mutations in the dynein assembly factor PF22 (DNAAF3) cause primary ciliary dyskinesia with absent dynein arms" @default.
- W168004080 doi "https://doi.org/10.1186/2046-2530-1-s1-p101" @default.
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