>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=96.85  E-value=0.013  Score=38.90  Aligned_cols=44  Identities=32%  Similarity=0.559  Sum_probs=34.7

Q ss_pred             CCHHHHHCCCCCCCCEEEEEEECHHHHHHHHHHHHHHHCCCCCCCEEEEEEEEEE
Q ss_conf             3012200023457821688875066899999875432125899816884434201
Q gi|254780268|r  150 GFPVLVKASAGGGGRGMRIAYSENDLSEAIDQARSEALAAFGNDAVYIEKYLENP  204 (443)
Q Consensus       150 GyPviiKp~~gGGG~Gi~vv~~~~el~~a~~~a~~ea~~~fgd~~vlvEk~i~~~  204 (443)
T Consensus        66 ~~~wI~KP~~~~~G~GI~l~~~~~~i~~~~~-----------~~~~VvQkYI~~P  109 (291)
T pfam03133        66 RNTWIVKPSASARGRGIRITNDLSQILKQIQ-----------SRPLVVQKYIERP  109 (291)
T ss_pred             CCEEEEEECCCCCCCCEEEECCHHHHHHHHC-----------CCCEEEEECCCCC
T ss_conf             9769991177689899698379999766523-----------7988975205775