A conserved flagella-associated protein in Chlamydomonas, FAP234, is essential for axonemal localization of tubulin polyglutamylase TTLL9
UMass Chan Affiliations
Department of Cell and Developmental BiologyDocument Type
Journal ArticlePublication Date
2014-01-01Keywords
Amino Acid SequenceAxoneme
Chlamydomonas reinhardtii
Conserved Sequence
Cytoplasm
Enzyme Stability
Flagella
Peptide Synthases
Plant Proteins
Protein Binding
Protein Processing, Post-Translational
Protein Transport
Sequence Homology, Amino Acid
Tubulin
Cell Biology
Molecular Biology
Metadata
Show full item recordAbstract
Tubulin undergoes various posttranslational modifications, including polyglutamylation, which is catalyzed by enzymes belonging to the tubulin tyrosine ligase-like protein (TTLL) family. A previously isolated Chlamydomonas reinhardtii mutant, tpg1, carries a mutation in a gene encoding a homologue of mammalian TTLL9 and displays lowered motility because of decreased polyglutamylation of axonemal tubulin. Here we identify a novel tpg1-like mutant, tpg2, which carries a mutation in the gene encoding FAP234, a flagella-associated protein of unknown function. Immunoprecipitation and sucrose density gradient centrifugation experiments show that FAP234 and TTLL9 form a complex. The mutant tpg1 retains FAP234 in the cell body and flagellar matrix but lacks it in the axoneme. In contrast, tpg2 lacks both TTLL9 and FAP234 in all fractions. In fla10, a temperature-sensitive mutant deficient in intraflagellar transport (IFT), both TTLL9 and FAP234 are lost from the flagellum at nonpermissive temperatures. These and other results suggest that FAP234 functions in stabilization and IFT-dependent transport of TTLL9. Both TTLL9 and FAP234 are conserved in most ciliated organisms. We propose that they constitute a polyglutamylation complex specialized for regulation of ciliary motility.Source
Mol Biol Cell. 2014 Jan;25(1):107-17. doi: 10.1091/mbc.E13-07-0424. Epub 2013 Nov 6. Link to article on publisher's siteDOI
10.1091/mbc.E13-07-0424Permanent Link to this Item
http://hdl.handle.net/20.500.14038/30548PubMed ID
24196831Related Resources
Link to Article in PubMedRights
© 2014 Kubo et al. This article is distributed by The American Society for Cell Biology under license from the author(s). Two months after publication it is available to the public under an Attribution–Noncommercial–Share Alike 3.0 Unported Creative Commons License (http://creativecommons.org/licenses/by-nc-sa/3.0)Distribution License
http://creativecommons.org/licenses/by-nc-sa/3.0/ae974a485f413a2113503eed53cd6c53
10.1091/mbc.E13-07-0424
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Except where otherwise noted, this item's license is described as © 2014 Kubo et al. This article is distributed by The American Society for Cell Biology under license from the author(s). Two months after publication it is available to the public under an Attribution–Noncommercial–Share Alike 3.0 Unported Creative Commons License (http://creativecommons.org/licenses/by-nc-sa/3.0)
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