FBXO5

F-box only protein 5

447 amino acids

Regulator of APC activity during mitotic and meiotic cell cycle (PubMed:17485488, PubMed:17234884, PubMed:17875940, PubMed:23708001, PubMed:23708605, PubMed:16921029). During mitotic cell cycle plays a role as both substrate and inhibitor of APC-FZR1 complex (PubMed:29875408, PubMed:17485488, PubMed:17234884, PubMed:17875940, PubMed:23708001, PubMed:23708605, PubMed:16921029). During G1 phase, plays a role as substrate of APC-FZR1 complex E3 ligase (PubMed:29875408). Then switches as an inhibitor of APC-FZR1 complex during S and G2 leading to cell-cycle commitment (PubMed:29875408). As APC inhibitor, prevents the degradation of APC substrates at multiple levels: by interacting with APC and blocking access of APC substrates to the D-box coreceptor, formed by FZR1 and ANAPC10; by suppressing ubiquitin ligation and chain elongation by APC by preventing the UBE2C and UBE2S activities (PubMed:23708605, PubMed:23708001, PubMed:16921029). Plays a role in genome integrity preservation by coordinating DNA replication with mitosis through APC inhibition in interphase to stabilize CCNA2 and GMNN in order to promote mitosis and prevent rereplication and DNA damage-induced cellular senescence (PubMed:17234884, PubMed:17485488, PubMed:17875940). During oocyte maturation, plays a role in meiosis through inactivation of APC-FZR1 complex. Inhibits APC through RPS6KA2 interaction that increases FBXO5 affiniy for CDC20 leading to the metaphase arrest of the second meiotic division before fertilization (By similarity). Controls entry into the first meiotic division through inactivation of APC-FZR1 complex (By similarity). Promotes migration and osteogenic differentiation of mesenchymal stem cells (PubMed:29850565).

50.146 kDa

MSRRPCSCALRPPRCSCSASPSAVTAAGRPRPSDSCKEESSTLSVKMKCDFNCNHVHSGLKLVKPDDIGRLVSYTPAYLEGSCKDCIKDYERLSCIGSPIVSPRIVQLETESKRLHNKENQHVQQTLNSTNEIEALETSRLYEDSGYSSFSLQSGLSEHEEGSLLEENFGDSLQSCLLQIQSPDQYPNKNLLPVLHFEKVVCSTLKKNAKRNPKVDREMLKEIIARGNFRLQNIIGRKMGLECVDILSELFRRGLRHVLATILAQLSDMDLINVSKVSTTWKKILEDDKGAFQLYSKAIQRVTENNNKFSPHASTREYVMFRTPLASVQKSAAQTSLKKDAQTKLSNQGDQKGSTYSRHNEFSEVAKTLKKNESLKACIRCNSPAKYDCYLQRATCKREGCGFDYCTKCLCNYHTTKDCSDGKLLKASCKIGPLPGTKKSKKNLRRL

Fbxo5

F-box only protein 5

421 amino acids

Regulator of APC activity during mitotic and meiotic cell cycle (PubMed:17190794, PubMed:15526037, PubMed:16809773). During mitotic cell cycle plays a role as both substrate and inhibitor of APC-FZR1 complex (PubMed:16809773). During G1 phase, plays a role as substrate of APC-FZR1 complex E3 ligase. Then switches as an inhibitor of APC-FZR1 complex during S and G2 leading to cell-cycle commitment. As APC inhibitor, prevents the degradation of APC substrates at multiple levels: by interacting with APC and blocking access of APC substrates to the D-box co-receptor, formed by FZR1 and ANAPC10; by suppressing ubiquitin ligation and chain elongation by APC by preventing the UBE2C and UBE2S activities. Plays a role in genome integrity preservation by coordinating DNA replication with mitosis through APC inhibition in interphase to stabilize CCNA2 and GMNN in order to promote mitosis and prevent rereplication and DNA damage-induced cellular senescence (By similarity). During oocyte maturation, plays a role in meiosis through inactivation of APC-FZR1 complex. Inhibits APC through RPS6KA2 interaction that increases FBXO5 affiniy for CDC20 leading to the metaphase arrest of the second meiotic division before fertilization (PubMed:15526037). Controls entry into the first meiotic division through inactivation of APC-FZR1 complex (PubMed:17190794). Promotes migration and osteogenic differentiation of mesenchymal stem cells (By similarity).

47.508 kDa

MSRRTCSDLRRPSSCPCRLGARTTVDGCKEESPVLSVTMKCFNCNPDLSELEVVKPEDSGIEASYSPVCLEPSCNDCVRNHERLSFIDSPIVGHDNKENQRVQNTLDSSNETEELEASRLYEDSGYSSFTQSDRDDGILILENFRNSPQARLLPSQSPDQHPNKTLLPVLHFERVVCSTLKKNGKRNPKVDREMLKEVIASGNFRLQNIIGKKMGLEHLDILAELSRRGFVHLLANILTKLSGMDLVNLSKVSRIWKKILENNKGAFQLYSKTMQRVIESSKLSLHATTRGYVVGRAALTCVQKSSTWAPPKKDVQIKSSSQRGQRVSTYSRHNEFVEVAKTLKNNESLKACVRCNFPAKYDHYLERAVCKRESCQFEYCTKCLCAYHNNKDCLNGKILKASCKVGPLPGTKKSKKNLQRL

fbxo5

F-box only protein 5

391 amino acids

Regulates progression through early mitosis by inhibiting the anaphase promoting complex/cyclosome (APC). Binds to the APC activators cdc20 to prevent APC activation. Can also bind directly to the APC to inhibit substrate-binding. Required to arrest unfertilized eggs at metaphase of meiosis II, by preventing their release from metaphase of meiosis II, through inhibition of APC-dependent cyclin B destruction leading to stabilization of cyclin B-cdk1 complex activity.

44 kDa

MMCGFTSNQSPKKLSSKKLSATNVHLEISPVKCDSPCKGYENVQASYLDTANCTTVTRGADIKDDLPLHNKENLLHRFGDLETHSDEEYSGLQDSGYSSILQNDSPCQDETDNNVSDIQLRETPKNFVQFQKPLHTLSTKNLPALRFEEAMCSTLKKMRKTSKKIDWNAVDDVVCGGNYGLENLIGKNMGLERFDILAELFHRDFKHLLTKILRHLSAMDLINVISVSTTWRKILQKDNSAYNSYKLGCKELCEKKAKVSAHTATRDESLCRVPLASVQKVAASSLCTSKKQSKNRGLSNNRHAEFIEVAQTLKNDQCLKVCVDCSSPAKYDPYLHRATCTRESCKFDFCTLCSCKYHGSKCCQTSKPRSYRVPSEPLPGSKKSKQNLRRL