>cd01490 Ube1_repeat2 Ubiquitin activating enzyme (E1), repeat 2. 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. Ubiquitin-E1 is a single-chain protein with a weakly conserved two-fold repeat. This CD represents the second repeat of Ub-E1.

Probab=92.24 E-value=0.83 Score=24.15 Aligned_cols=106 Identities=13% Similarity=0.202 Sum_probs=58.6 Q ss_pred EEEEECCCCHHHHHHHHHHHHCCCC---EEEEEEEE---------------CCCCCCEEEE--------CCCCEEEEE-- Q ss_conf 7999816677899999999744998---07899997---------------4765875600--------278158998-- Q gi|254780307|r 4 KVAVVGATGNVGREMLNIICERGFP---ISEVVALA---------------SERSAGTKVP--------FGKETIDVQ-- 55 (335) Q Consensus 4 kvaIiGatG~vG~el~~lL~~~~~p---~~~l~~~~---------------s~~~~G~~i~--------~~~~~~~~~-- 55 (335) T Consensus 1 kvlvVGA-GgIGCEllKnlal~G~~~~~~G~i~v~D~D~Ie~SNLnRQFLFr~~digk~Ks~vA~~~v~~~np~~~i~~~ 79 (435) T cd01490 1 KVFLVGA-GAIGCELLKNFALMGVGTGESGEITVTDMDNIEKSNLNRQFLFRPHDVGKPKSEVAAAAVKAMNPDLKITAL 79 (435) T ss_pred CEEEECC-CHHHHHHHHHHHHCCCCCCCCCCEEEEECCCEECCCCCCCCCCCHHHCCCCHHHHHHHHHHHHCCCCEEEEE T ss_conf 9899937-764189999999838786898808997088473357534427564448973999999999987899747860 Q ss_pred ---------EC-CHHHHCCCCEEEECCCHHHHHHHHHHH-CCCCEEEEECCCCHHCCCCCCCCCCCH Q ss_conf ---------77-943631884786068758999999750-456517996145100112111236410 Q gi|254780307|r 56 ---------DV-KSYDFSDTDICLMSAGHAVSSQMSPKI-AANGCIVIDNSSAWRYDSDVPLIVPEV 111 (335) Q Consensus 56 ---------~~-~~~~~~~~Divf~a~p~~~s~~~~~~~-~~~g~~VIDlS~~~R~~~d~p~~lPei 111 (335) T Consensus 80 ~~~v~~~te~~f~~~f~~~~d~v~naLDNv~aR~yv~~~Cv~~~~PLiEsGT~-G~kG~vqviiP~~ 145 (435) T cd01490 80 QNRVGPETEHIFNDEFWEKLDGVANALDNVDARMYVDRRCVYYRKPLLESGTL-GTKGNTQVVIPHL 145 (435) T ss_pred CCCCCCCCCCCCCHHHHHHCCEEEECCCCHHHHHHHHHHHHHCCCCEEECCCC-CCCCCEEEEECCC T ss_conf 25456774233677678438899988578899999999999749983744678-7675369983786

HHsearch alignment for GI: 254780307 and conserved domain: cd01490