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  • Title: TTLL10 can perform tubulin glycylation when co-expressed with TTLL8.
    Author: Ikegami K, Setou M.
    Journal: FEBS Lett; 2009 Jun 18; 583(12):1957-63. PubMed ID: 19427864.
    Abstract:
    Tubulin can undergo unusual post-translational modifications, glycylation and glutamylation. We previously failed to find glycylase (glycine ligase) for tubulin while identifying TTLL10 as a polyglycylase for nucleosome assembly protein 1. We here examine whether TTLL10 performs tubulin glycylation. We used a polyclonal antibody (R-polygly) raised against a poly(glycine) chain, which does not recognize monoglycylated protein. R-polygly strongly reacted with mouse tracheal cilia and axonemal tubulins. R-polygly detected many proteins in cell lysates co-expressing TTLL10 with TTLL8. Two-dimensional electrophoresis revealed that the R-polygly-reactive proteins included alpha- and beta-tubulin. R-polygly labeling signals overlapped with microtubules. These results indicate that TTLL10 can strongly glycylate tubulin in a TTLL8-dependent manner. Furthermore, these two TTLL proteins can glycylate unidentified 170-, 110-, 75-, 40-, 35-, and 30-kDa acidic proteins.
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