E3 ubiquitin-protein ligase that functions in the antephase checkpoint by actively delaying passage into mitosis in response to microtubule poisons. Acts in early prophase before chromosome condensation, when the centrosome move apart from each other along the periphery of the nucleus. Probably involved in signaling the presence of mitotic stress caused by microtubule poisons by mediating the 'Lys-48'-linked ubiquitination of target proteins, leading to their degradation by the proteasome. May also promote the formation of 'Lys-63'-linked polyubiquitin chains and functions with the specific ubiquitin-conjugating ubc13-mms2 (ube2n-ube2v2) heterodimer. Substrates that are polyubiquitinated at 'Lys-63' are usually not targeted for degradation, but are rather involved in signaling cellular stress.

Belongs to the CHFR family.

625 amino acids

MEGLDEKKPWGKLSRLLGAETDSSSELFLYKKEWTIGRKKACDLSFPGNKLVSGEHCKITVNEESGEVSLEDTSTNGTVINKLKVIRKQTYPLKNGDVIYVVYRKNEPEQNVAYLYKSLNQGQDSLHDPADTSGSEEAETQTLSSQDDQLSYEEPQPSTSTSSLFSTPTTSAIPGVQLESAEKSGESLGGHSSTSDASPAIRASIPKSNLSTQEQGSLGPPKKRIRTEDHWTTNKNFVPASCPIGASDESKTPSMKPDKMEETLTCIICQELLHDCVSLQPCMHTFCAACYSGWMERSSLCPTCRCPVERICKNHILNNLVEAYLIQHPEKCRSEEDRCSMDARNKITQDMLQPKVRRSFSDEEGSSEDLLELSDVDSESSDISQPYTVCRQCPGFVRHSMQPPPYPPPSDTETSRTQGDAPSTSTNFPTATQEYVCPSHGSHVICTCCFQPMPDRRAEREHNSHVAPQQCTICLEPFCHMYWGCNRMGCFGCLAPFCELNLGDKCLDGVLNNNNYESDILKNYLASRGLTWKDMLNESLAAVQRGVFMLPDYRINGTTVLCYFCGLRNFRILTYQYRQNIPASELPVTVTSRPNCYWGRNCRTQVKAHHAMKFNHICEQTRFKN

70 kDa

(Note: Representative image - actual molecular weight may vary depending on tag type and expression method)

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