>cd01488 Uba3_RUB Ubiquitin activating enzyme (E1) subunit UBA3. UBA3 is part of the heterodimeric activating enzyme (E1), specific for the Rub family of ubiquitin-like proteins (Ubls). E1 enzymes are part of a conjugation cascade to attach Ub or Ubls, covalently to substrate proteins. consisting of activating (E1), conjugating (E2), and/or ligating (E3) enzymes. E1 activates ubiquitin(-like) by C-terminal adenylation, and subsequently forms a highly reactive thioester bond between its catalytic cysteine and Ubls C-terminus. E1 also associates with E2 and promotes ubiquitin transfer to the E2's catalytic cysteine. Post-translational modification by Rub family of ubiquitin-like proteins (Ublps) activates SCF ubiquitin ligases and is involved in cell cycle control, signaling and embryogenesis. UBA3 contains both the nucleotide-binding motif involved in adenylation and the catalytic cysteine involved in the thioester intermediate and Ublp transfer to E2.

Probab=94.28  E-value=0.28  Score=27.09  Aligned_cols=31  Identities=29%  Similarity=0.460  Sum_probs=24.8

Q ss_pred             EEEEECCCCHHHHHHHHHHHHHCCCEEEEEEC
Q ss_conf             48997678827799999999868987999947
Q gi|254780920|r    2 RLIVTGGAGFIGSALCRYLVNDLKIQVLVIDK   33 (358)
Q Consensus         2 kILItG~tGfIGs~l~~~Ll~~~~~~V~~~d~   33 (358)
T Consensus         1 kvlvvG~Gg-lG~e~~k~la~~Gvg~i~ivD~   31 (291)
T cd01488           1 KILVIGAGG-LGCELLKNLALSGFRNIHVIDM   31 (291)
T ss_pred             CEEEECCCH-HHHHHHHHHHHCCCCEEEEECC
T ss_conf             989992888-8999999999848985999739