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BUB1B

Gene
Bub1b
Protein
Mitotic checkpoint serine/threonine-protein kinase BUB1 beta
Organism
Mus musculus
Length
1052 amino acids
Function
Essential component of the mitotic checkpoint. Required for normal mitosis progression and tumor suppression. The mitotic checkpoint delays anaphase until all chromosomes are properly attached to the mitotic spindle. One of its checkpoint functions is to inhibit the activity of the anaphase-promoting complex/cyclosome (APC/C) by blocking the binding of CDC20 to APC/C, independently of its kinase activity. The other is to monitor kinetochore activities that depend on the kinetochore motor CENPE. Required for kinetochore localization of CENPE. Negatively regulates PLK1 activity in interphase cells and suppresses centrosome amplification. Also implicated in triggering apoptosis in polyploid cells that exit aberrantly from mitotic arrest. Essential for tumor suppression. May play a role in regulating aging and fertility (By similarity).
Similarity
Belongs to the protein kinase superfamily. Ser/Thr protein kinase family. BUB1 subfamily.
Mass
118.392 kDa
Sequence
MAEASEAMCLEGAEWELSKENIQPLRHGRVMSTLQGALAKQESAGHTALQQQKRAFESEIRFYSGDDPLDVWDRYINWTEQNYPQGGKESNMSALVERAIEALQGETRYYNDPRFLSLWIKLGHLCNEPLDMYSYLQSQGIGVSLAQFYISWAEEYEARENFKKADIIFQEGIERKAEPLDRLQSQHRQFQSRVSRQAFLALGNEEEEALEPSEPQRSSLAELKSRGKKMARAPISRVGGALKAPGQSRGFLNAVPQPVHGNRRITVFDENADTASRTELSKPVAQPWMAPPVPRAKENELQPGPWSTDRPAGRRPHDNPASVTSIPSVLPSFTPYVEESAQQTVMTPCKIEPSINHVLSTRKPGREEGDPLQRVQSHQQGCEEKKEKMMYCKEKIYAGVGEFSFEEIRAEVFRKKLKERREAELLTSAKKREEMQKQIEEMERRLKAMQAVQQEGAGGQQEEKMPTEDPARLQIASGPQEMSGVPLSCSICPLSSNPREISPAENILQEQPDSKGSSMPFSIFDESLSDKKDKSPATGGPQVLNAQRRPLSVLKTTEVGTTNEDVSPDICDELTELEPLSEDAIITGFRNVTLCPNPEDTCDFARAARLASTPFHEILSSKGIAADPEGLLQEEDLDGKAAEAHHTVHHQALIIKKLSPIIEESREATHSSGFSRSSSSAPSTSSIKGFQLLEKLELTNDGAEDAIQSPWCSQYRLQLLKSLLELSAFAEFSVEDRPMPVLEIGKEIELGPEDYVIKQEHLTCDDYRLFWVAPRSSAELTMIKASSQPIPWDFYINLKLKERLNEDYDQLCSCCQYQDGHVVWYQYINCSTLQNLLQHSEFVTHEIIVLIIYNLLTIVEKLHRAEIVHGDLSPRSLILRNRIHDPYDYVNKDDHAVRIMDFSYSVDLRVQLDAFAYSGFRTAQILEGQKILANCSSPYHVDLLGIADLAHLLLFKEHLHVFWDGLLWKLSQSTSELKDSELWNKFFVRILNASDKSTVSVLGELAAEMGGAFDATFHSHLNRALWKLGKTISPEALLTQQDKQPGGSQSPA

Gene
BUB1B
Protein
Mitotic checkpoint serine/threonine-protein kinase BUB1 beta
Organism
Homo sapiens
Length
1050 amino acids
Function
Essential component of the mitotic checkpoint. Required for normal mitosis progression. The mitotic checkpoint delays anaphase until all chromosomes are properly attached to the mitotic spindle. One of its checkpoint functions is to inhibit the activity of the anaphase-promoting complex/cyclosome (APC/C) by blocking the binding of CDC20 to APC/C, independently of its kinase activity. The other is to monitor kinetochore activities that depend on the kinetochore motor CENPE. Required for kinetochore localization of CENPE. Negatively regulates PLK1 activity in interphase cells and suppresses centrosome amplification. Also implicated in triggering apoptosis in polyploid cells that exit aberrantly from mitotic arrest. May play a role for tumor suppression.
Similarity
Belongs to the protein kinase superfamily. Ser/Thr protein kinase family. BUB1 subfamily.
Mass
119.545 kDa
Sequence
MAAVKKEGGALSEAMSLEGDEWELSKENVQPLRQGRIMSTLQGALAQESACNNTLQQQKRAFEYEIRFYTGNDPLDVWDRYISWTEQNYPQGGKESNMSTLLERAVEALQGEKRYYSDPRFLNLWLKLGRLCNEPLDMYSYLHNQGIGVSLAQFYISWAEEYEARENFRKADAIFQEGIQQKAEPLERLQSQHRQFQARVSRQTLLALEKEEEEEVFESSVPQRSTLAELKSKGKKTARAPIIRVGGALKAPSQNRGLQNPFPQQMQNNSRITVFDENADEASTAELSKPTVQPWIAPPMPRAKENELQAGPWNTGRSLEHRPRGNTASLIAVPAVLPSFTPYVEETARQPVMTPCKIEPSINHILSTRKPGKEEGDPLQRVQSHQQASEEKKEKMMYCKEKIYAGVGEFSFEEIRAEVFRKKLKEQREAELLTSAEKRAEMQKQIEEMEKKLKEIQTTQQERTGDQQEETMPTKETTKLQIASESQKIPGMTLSSSVCQVNCCARETSLAENIWQEQPHSKGPSVPFSIFDEFLLSEKKNKSPPADPPRVLAQRRPLAVLKTSESITSNEDVSPDVCDEFTGIEPLSEDAIITGFRNVTICPNPEDTCDFARAARFVSTPFHEIMSLKDLPSDPERLLPEEDLDVKTSEDQQTACGTIYSQTLSIKKLSPIIEDSREATHSSGFSGSSASVASTSSIKCLQIPEKLELTNETSENPTQSPWCSQYRRQLLKSLPELSASAELCIEDRPMPKLEIEKEIELGNEDYCIKREYLICEDYKLFWVAPRNSAELTVIKVSSQPVPWDFYINLKLKERLNEDFDHFCSCYQYQDGCIVWHQYINCFTLQDLLQHSEYITHEITVLIIYNLLTIVEMLHKAEIVHGDLSPRCLILRNRIHDPYDCNKNNQALKIVDFSYSVDLRVQLDVFTLSGFRTVQILEGQKILANCSSPYQVDLFGIADLAHLLLFKEHLQVFWDGSFWKLSQNISELKDGELWNKFFVRILNANDEATVSVLGELAAEMNGVFDTTFQSHLNKALWKVGKLTSPGALLFQ