>pfam03133 TTL Tubulin-tyrosine ligase family. Tubulins and microtubules are subjected to several post-translational modifications of which the reversible detyrosination/tyrosination of the carboxy-terminal end of most alpha-tubulins has been extensively analysed. This modification cycle involves a specific carboxypeptidase and the activity of the tubulin-tyrosine ligase (TTL). The true physiological function of TTL has so far not been established. Tubulin-tyrosine ligase (TTL) catalyses the ATP-dependent post-translational addition of a tyrosine to the carboxy terminal end of detyrosinated alpha-tubulin. In normally cycling cells, the tyrosinated form of tubulin predominates. However, in breast cancer cells, the detyrosinated form frequently predominates, with a correlation to tumour aggressiveness. On the other hand, 3-nitrotyrosine has been shown to be incorporated, by TTL, into the carboxy terminal end of detyrosinated alpha-tubulin. This reaction is not reversible by the carboxypep

Probab=95.90  E-value=0.0098  Score=39.76  Aligned_cols=41  Identities=17%  Similarity=0.472  Sum_probs=31.4

Q ss_pred             CEEEEEECCCCCCCCCCCHHHHHHHHHHHHHHHCCCCHHHHHHHHHH
Q ss_conf             20256304653430002323567788878875144531777887752
Q gi|254780206|r  138 MPIVVKADGLCAGKGVVVAATVDEATSAIDRCFQQINSTVIIEEYLE  184 (424)
Q Consensus       138 ~PvVVKp~~~agGkGV~i~~~~~e~~~~~~~~~~~~~~~VliEefl~  184 (424)
T Consensus        67 ~~wI~KP~~~~~G~GI~l~~~~~~i~~~~~------~~~~VvQkYI~  107 (291)
T pfam03133        67 NTWIVKPSASARGRGIRITNDLSQILKQIQ------SRPLVVQKYIE  107 (291)
T ss_pred             CEEEEEECCCCCCCCEEEECCHHHHHHHHC------CCCEEEEECCC
T ss_conf             769991177689899698379999766523------79889752057