>cd01484 E1-2_like Ubiquitin activating enzyme (E1), repeat 2-like. E1, a highly conserved small protein present universally in eukaryotic cells, is part of cascade to attach ubiquitin (Ub) covalently to substrate proteins. This cascade consists of activating (E1), conjugating (E2), and/or ligating (E3) enzymes and then targets them for degradation by the 26S proteasome. E1 activates ubiquitin by C-terminal adenylation, and subsequently forms a highly reactive thioester bond between its catalytic cysteine and ubiquitin's C-terminus. E1 also associates with E2 and promotes ubiquitin transfer to the E2's catalytic cysteine. A set of novel molecules with a structural similarity to Ub, called Ub-like proteins (Ubls), have similar conjugation cascades. In contrast to ubiquitin-E1, which is a single-chain protein with a weakly conserved two-fold repeat, many of the Ubls-E1are a heterodimer where each subunit corresponds to one half of a single-chain E1. This CD represents the family homologou

Probab=94.27 E-value=0.18 Score=26.90 Aligned_cols=88 Identities=18% Similarity=0.189 Sum_probs=0.0 Q ss_pred CEEEECCCHHHHHHHHHHHHCCC-CEEEECCCHHHHHHHHHCC---------------------------CCEEECCCCC Q ss_conf 17997377489999999984799-0899719989999999769---------------------------9299978999 Q gi|254780924|r 450 HVILVGYGRIGKVIVQNLKAAGI-ALLVIEDSEKKIEELRSLG---------------------------IDVIYGNATI 501 (609) Q Consensus 450 ~vii~G~g~~g~~~~~~L~~~~~-~v~vid~~~~~~~~~~~~g---------------------------~~~~~gd~~~ 501 (609) T Consensus 1 KVlvvGaGglGce~~k~La~~Gvg~i~iiD~D~Ie~SNLnRQfLf~~~dvGk~Ka~vAa~~l~~~Np~~~I~~~~~~v~~ 80 (234) T cd01484 1 KVLLVGAGGIGCELLKNLALMGFGQIHVIDMDTIDVSNLNRQFLFRPKDIGRPKSEVAAEAVNDRNPNCKVVPYQNKVGP 80 (234) T ss_pred CEEEECCCHHHHHHHHHHHHCCCCEEEEECCCEECCCCCCHHHCCCCCCCCCCHHHHHHHHHHHHCCCCEEEEEECCCCC T ss_conf 98999488879999999998399869997599005677013024464426882299999999987899779998055686 Q ss_pred HHHHHHCCHHHCCEEEEECCCHHHHHHHHHHHHHHC Q ss_conf 899984893146799993599689999999999958 Q gi|254780924|r 502 TKILLMANIEKARSLVVSISTAFEAAYITQEARNSN 537 (609) Q Consensus 502 ~~~l~~~~i~~a~~vi~~~~~~~~n~~~~~~~~~~~ 537 (609) T Consensus 81 e~~~~~~f~~~~DvVi~alDN~~aR~~vN~~c~~~~ 116 (234) T cd01484 81 EQDFNDTFFEQFHIIVNALDNIIARRYVNGMLIFLI 116 (234) T ss_pred CCCCCHHHHHHCCEEEECCCCHHHHHHHHHHHHHHC T ss_conf 210579888529999988578889999999999809

HHsearch alignment for GI: 254780924 and conserved domain: cd01484