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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Posttranslational glutamylation of alpha-tubulin.

The high degree of tubulin heterogeneity in neurons is controlled mainly at the posttranslational level. Several variants of alpha-tubulin can be posttranslationally labeled after incubation of cells with [3H]acetate or [3H]glutamate. Peptides carrying the radioactive moiety were purified by high-performance liquid chromatography. Amino acid analysis, Edman degradation sequencing, and mass spectrometric analysis of these peptides led to the characterization of a posttranslational modification consisting of the successive addition of glutamyl units on the gamma-carboxyl group of a glutamate residue (Glu445). This modification, localized within a region of alpha-tubulin that is important in the interactions of tubulin with microtubule-associated proteins and calcium, could play a role in regulating microtubule dynamics.[1]


  1. Posttranslational glutamylation of alpha-tubulin. Eddé, B., Rossier, J., Le Caer, J.P., Desbruyères, E., Gros, F., Denoulet, P. Science (1990) [Pubmed]
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