About Products Protein Database Contact

kap104

Gene
KAP104
Protein
Importin subunit beta-2
Organism
Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Length
918 amino acids
Function
Functions in nuclear protein import as nuclear transport receptor. Serves as receptor for arginine/glycine-rich nuclear localization signals (rg-NLS) and PY-NLS in cargo substrates. Its predominant cargo substrate seems to be mRNA-binding proteins. Required for nuclear transport of NAB2, HRP1/NAB4 and TFG2. Mediates docking of the importin/substrate complex to the nuclear pore complex (NPC) through binding to repeat-containing nucleoporins (PubMed:8849456, PubMed:9488461, PubMed:10506153, PubMed:19366694). The complex is subsequently translocated through the pore by an energy requiring, Ran-dependent mechanism (PubMed:11423015). At the nucleoplasmic side of the NPC, GTP-Ran binding leads to release of the cargo. Efficient GTP-Ran-mediated substrate release requires RNA (PubMed:10506153). The importin is re-exported from the nucleus to the cytoplasm where GTP hydrolysis releases Ran from importin. The directionality of nuclear import is thought to be conferred by an asymmetric distribution of the GTP- and GDP-bound forms of Ran between the cytoplasm and nucleus (PubMed:11423015).
Similarity
Belongs to the importin beta family. Importin beta-2 subfamily.
Mass
103.681 kDa
Sequence
MASTWKPAEDYVLQLATLLQNCMSPNPEIRNNAMEAMENFQLQPEFLNYLCYILIEGESDDVLKQHYSLQDLQNNRATAGMLLKNSMLGGNNLIKSNSHDLGYVKSNIIHGLYNSNNNLVSNVTGIVITTLFSTYYRQHRDDPTGLQMLYQLLELTSNGNEPSIKALSKIMEDSAQFFQLEWSGNTKPMEALLDSFFRFISNPNFSPVIRSESVKCINTVIPLQTQSFIVRLDKFLEIIFQLAQNDENDLVRAQICISFSFLLEFRPDKLVSHLDGIVQFMLHLITTVNEEKVAIEACEFLHAFATSPNIPEHILQPYVKDIVPILLSKMVYNEESIVLLEASNDDDAFLEDKDEDIKPIAPRIVKKKEAGNGEDADDNEDDDDDDDDEDGDVDTQWNLRKCSAATLDVMTNILPHQVMDIAFPFLREHLGSDRWFIREATILALGAMAEGGMKYFNDGLPALIPFLVEQLNDKWAPVRKMTCWTLSRFSPWILQDHTEFLIPVLEPIINTLMDKKKDVQEAAISSVAVFIENADSELVETLFYSQLLTSFDKCLKYYKKKNLIILYDAIGRFAEKCALDETAMQIILPPLIEKWALLSDSDKELWPLLECLSCVASSLGERFMPMAPEVYNRAFRILCHCVELEAKSHQDPTIVVPEKDFIITSLDLIDGLVQGLGAHSQDLLFPQGTKDLTILKIMLECLQDPVHEVRQSCFALLGDIVYFFNSELVIGNLEDFLKLIGTEIMHNDDSDGTPAVINAIWALGLISERIDLNTYIIDMSRIILDLFTTNTQIVDSSVMENLSVTIGKMGLTHPEVFSSGAFANDSNWNKWCLSVNALDDVEEKSSAYMGFLKIINLTSTEVTMSNDTIHKIVTGLSSNVEANVFAQEIYTFLMNHSAQISAINFTPDEISFLQQFTS

Gene
kap104
Protein
Importin subunit beta-2
Organism
Schizosaccharomyces pombe (strain 972 / ATCC 24843)
Length
910 amino acids
Function
Functions in nuclear protein import as nuclear transport receptor. Serves as receptor for arginine/glycine-rich nuclear localization signals (rg-NLS) and PY-NLS in cargo substrates. Its predominant cargo substrate seems to be mRNA-binding proteins. Mediates docking of the importin/substrate complex to the nuclear pore complex (NPC) through binding to repeat-containing nucleoporins. The complex is subsequently translocated through the pore by an energy requiring, Ran-dependent mechanism. At the nucleoplasmic side of the NPC, GTP-Ran binding leads to release of the cargo. The importin is re-exported from the nucleus to the cytoplasm where GTP hydrolysis releases Ran from importin. The directionality of nuclear import is thought to be conferred by an asymmetric distribution of the GTP- and GDP-bound forms of Ran between the cytoplasm and nucleus.
Similarity
Belongs to the importin beta family. Importin beta-2 subfamily.
Mass
101.718 kDa
Sequence
MGDNPWVLQEQVLVELSEVIKNSLSENSQTRNAALNLLEKAKDIPDLNNYLTCILINATELSVSIRSAAGLLLKNNVRVSSLESGSGLQSLDYTKSTVIRGLCDPEQLIRGISGNVITTIISRWGISTWPEVLPQLMEMLSSPASTTQEGAFSALTKICEDSAQELDRDFNGTRPLDFMIPRFIELARHENPKIRTDALFCLNQFVLIQSQSLYAHIDTFLETCYALATDVSPNVRKNVCQALVYLLDVRPDKIAPSLGSIVEYMLYSTQDSDQNVALEACEFWLAIAEQPDLCSALGPYLDKIVPMLLQGMVYSDMDLLLLGNDADDYDVEDREEDIRPQHAKGKSRITLNTQGPITQQGSSNADADELEDEDEDDDEFDEDDDAFMDWNLRKCSAAALDVLSSFWKQRLLEIILPHLKQSLTSEDWKVQEAGVLAVGAIAEGCMDGMVQYLPELYPYFLSLLDSKKPLVRTITCWTLGRYSKWASCLESEEDRQKYFVPLLQGLLRMVVDNNKKVQEAGCSAFAILEEQAGPSLVPYLEPILTNLAFAFQKYQRKNVLILYDAVQTLADYVGSALNDKRYIELLITPLLQKWSMIPDDDPNLFPLFECLSSVAVALRDGFAPFAAETYARTFRILRNTLYLITTAQNDPTVDVPDRDFLVTTLDLVSGIIQALGSQVSPLLAQADPPLGQIIGICAKDEVPEVRQSAYALLGDMCMYCFDQIRPYCDALLVDMLPQMQLPLLHVSASNNAIWSAGEMALQLGKDMQQWVKPLLERLICILKSKKSNTTVLENVAITIGRLGVYNPELVAPHLELFYQPWFEIIKTVGENEEKDSAFRGFCNILACNPQALSYLLPMFVLCVAEYENPSAELRDMFQKILQGSVELFNGKASWQASPEVLAQIQAQYGV