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TJP3

Gene
TJP3
Protein
Tight junction protein ZO-3
Organism
Homo sapiens
Length
919 amino acids
Function
TJP1, TJP2, and TJP3 are closely related scaffolding proteins that link tight junction (TJ) transmembrane proteins such as claudins, junctional adhesion molecules, and occludin to the actin cytoskeleton (PubMed:16129888). The tight junction acts to limit movement of substances through the paracellular space and as a boundary between the compositionally distinct apical and basolateral plasma membrane domains of epithelial and endothelial cells. Binds and recruits PATJ to tight junctions where it connects and stabilizes apical and lateral components of tight junctions (PubMed:16129888). Promotes cell-cycle progression through the sequestration of cyclin D1 (CCND1) at tight junctions during mitosis which prevents CCND1 degradation during M-phase and enables S-phase transition (PubMed:21411630). With TJP1 and TJP2, participates to the junctional retention and stability of the transcription factor DBPA, but is not involved in its shuttling to the nucleus (By similarity). Contrary to TJP2, TJP3 is dispensable for individual viability, embryonic development, epithelial differentiation, and the establishment of TJs, at least in the laboratory environment (By similarity).
Similarity
Belongs to the MAGUK family.
Mass
101.397 kDa
Sequence
MEELTIWEQHTATLSKDPRRGFGIAISGGRDRPGGSMVVSDVVPGGPAEGRLQTGDHIVMVNGVSMENATSAFAIQILKTCTKMANITVKRPRRIHLPATKASPSSPGRQDSDEDDGPQRVEEVDQGRGYDGDSSSGSGRSWDERSRRPRPGRRGRAGSHGRRSPGGGSEANGLALVSGFKRLPRQDVQMKPVKSVLVKRRDSEEFGVKLGSQIFIKHITDSGLAARHRGLQEGDLILQINGVSSQNLSLNDTRRLIEKSEGKLSLLVLRDRGQFLVNIPPAVSDSDSSPLEDISDLASELSQAPPSHIPPPPRHAQRSPEASQTDSPVESPRLRRESSVDSRTISEPDEQRSELPRESSYDIYRVPSSQSMEDRGYSPDTRVVRFLKGKSIGLRLAGGNDVGIFVSGVQAGSPADGQGIQEGDQILQVNDVPFQNLTREEAVQFLLGLPPGEEMELVTQRKQDIFWKMVQSRVGDSFYIRTHFELEPSPPSGLGFTRGDVFHVLDTLHPGPGQSHARGGHWLAVRMGRDLREQERGIIPNQSRAEQLASLEAAQRAVGVGPGSSAGSNARAEFWRLRGLRRGAKKTTQRSREDLSALTRQGRYPPYERVVLREASFKRPVVILGPVADIAMQKLTAEMPDQFEIAETVSRTDSPSKIIKLDTVRVIAEKDKHALLDVTPSAIERLNYVQYYPIVVFFIPESRPALKALRQWLAPASRRSTRRLYAQAQKLRKHSSHLFTATIPLNGTSDTWYQELKAIIREQQTRPIWTAEDQLDGSLEDNLDLPHHGLADSSADLSCDSRVNSDYETDGEGGAYTDGEGYTDGEGGPYTDVDDEPPAPALARSSEPVQADESQSPRDRGRISAHQGAQVDSRHPQGQWRQDSMRTYEREALKKKFMRVHDAESSDEDGYDWGPATDL

Gene
Tjp3
Protein
Tight junction protein ZO-3
Organism
Mus musculus
Length
905 amino acids
Function
Tjp1, Tjp2, and Tjp3 are closely related scaffolding proteins that link tight junction (TJ) transmembrane proteins such as claudins, junctional adhesion molecules, and occludin to the actin cytoskeleton (PubMed:17000770). The tight junction acts to limit movement of substances through the paracellular space and as a boundary between the compositionally distinct apical and basolateral plasma membrane domains of epithelial and endothelial cells. Binds and recruits PatJ to tight junctions where it connects and stabilizes apical and lateral components of tight junctions (By similarity). Promotes cell-cycle progression through the sequestration of cyclin D1 (Ccnd1) at tight junctions during mitosis which prevents Ccnd1 degradation during M-phase and enables S-phase transition (PubMed:21411630). With Tjp1 and Tjp2, participates to the junctional retention and stability of the transcription factor DbpA, but is not involved in its shuttling to the nucleus (By similarity). Contrary to Tjp2, Tjp3 is dispensable for individual viability, embryonic development, epithelial differentiation, and the establishment of TJs, at least in the laboratory environment (PubMed:17000770, PubMed:18172007).
Similarity
Belongs to the MAGUK family.
Mass
99.324 kDa
Sequence
MEELTIWEQHTATLYKDPRRGFGIAVSGGHDRASGSVVVSDVVPGSPAEGRLRTGDHIVMVNGVSVENVTSAFAIQILKTCTKTANVTVKRPRRVQLPATKASPASGHQLSDQEEADHGRGYEGDSSSGSGRSWGERSRRSRAGRRGRVGSHGRRSSGGGSEANGLDLVSGYKRLPKQDVLMRPLKSVLVKRRNSEEFGVKLGSQIFIKHITESGLAARNHGLQEGDLILQINGVSSANLSLSDTRRLIEKSEGELTLLVLRDSGQFLVNIPPAVSDSDSSLMEDISDLTSELSQAPPSHVPPPPLKGQRSPEDSQTDSPVETPQPRRRERSVNSRAIAEPESPGESRYDIYRVPSRQSLEDRGYSPDTRVVSFPKGASIGLRLAGGNDVGIFVSGVQAGSPADGQGIQEGDEILQVNGMPFRNLTREEAVQFLLGLPPGEDMELVTQSKTGHSLRRWSQSRVGDSFYIRTHFELEPSPPYGLGFTRGDVFHVVDTLYPGSGPGHGHSSHGGLWLAARMGRDLREQERGVIPNQSRAEQLASLEAAQRAAGVGPGASVGSNPRAEFWRLRSLRRGTKKASTQRSREDLSALTRQGHYPPYERVVLREASFKRPVVILGPVADIAMKKLTTEMPEEFEIAESMSRTDSPSKIIKLDTVRVIAERDKHALLDVTPSAIERLNYVQYYPIVIFCAPESRPALKALREWLAPASRRSSRRLYAQAQKLQKHSGHLFTATIPLHGTSDSWYQEVKAVIQQQQARPIWTAEDQLNSSSEDLDLTGHGLAASSGDLSCDSRTNSDYEDTDGEGAYTDREGGPQDVDEEVAPTALARSSEPVWVDDHQGLMGHGTTITDKWETQADSHYTQDQRRQDSMRTYKHEALRKKFTRARDVESSDDEGYDWGPATDL

Gene
TJP3
Protein
Tight junction protein ZO-3
Organism
Canis lupus familiaris
Length
898 amino acids
Function
TJP1, TJP2, and TJP3 are closely related scaffolding proteins that link tight junction (TJ) transmembrane proteins such as claudins, junctional adhesion molecules, and occludin to the actin cytoskeleton (PubMed:12021270). The tight junction acts to limit movement of substances through the paracellular space and as a boundary between the compositionally distinct apical and basolateral plasma membrane domains of epithelial and endothelial cells. Binds and recruits PATJ to tight junctions where it connects and stabilizes apical and lateral components of tight junctions (PubMed:12021270). Promotes cell-cycle progression through the sequestration of cyclin D1 (CCND1) at tight junctions during mitosis which prevents CCND1 degradation during M-phase and enables S-phase transition (By similarity). With TJP1 and TJP2, participates to the junctional retention and stability of the transcription factor DBPA, but is not involved in its shuttling to the nucleus (PubMed:24986862). Contrary to TJP2, TJP3 is dispensable for individual viability, embryonic development, epithelial differentiation, and the establishment of TJs, at least in the laboratory environment (By similarity).
Similarity
Belongs to the MAGUK family.
Mass
98.415 kDa
Sequence
MEELTIWEQHTATLCRDPRRGFGIAISGGRDRASGSVVVSDVVPGGPADGRLQTGDHVVMVNGVSMESVTSTFAIQILKTCTKLANITVKRPRKIQLPATKAGTSGRGRQGLEEEADCGQGYDGDTSSGSGRSWDKRSRRARTGRRNQAGSRGRRSPGGNSEANGLALVSGFKRLPRQDVHMRPVKSVLVRRTESEEFGVTLGSQIFIKHITDSGLAARNRGLQEGDLILQINGVSSENLSLSDTRRLIEKSEGKLTLLVLRDRGQFLVNIPPAVSDSDSDSSFLDDISALGSELSQAVPSHVPPPPPHAQRSLDSDGTDSPRDSPPLRRENSLDSRTISEPDAPRHSSYDIYRVPSSQSAEDRGYSPDSRVVRFHKGTTIGLRLAGGNDVGIFVSGVQEGSPADGQGIQEGDQILQVNDVPFRNLTREEAVQFLVALPPGEEVELVTQRNEDIFRKMVQSRVGDSFYIRTHFELEASPPSGLGFTRGDVFHVLDTLCPGPGPSGARGTHWLAVRMGRDLREQERGIIPNQSRAEQLASLESAQRAVGAGPGASVGSSARAEFWRLRGLRRGAKKSTQRSREDLSALTRQGHYPPYERVVLREASFKRPVVILGPVADIAMQKLTAEMPDQFGIADSVLRTDSPSKIIKLDTVRVIAEKNKHALLDVTPSAVERLNYVQYYPIVVFCAPESRAALKALRQWLAPASRRSARRLYAQAQKLRKHSEHLFTATIPLRGTSDTWYQELKAVVREQQTRPIWTAEDQLDNSSEDNLELPHRGLADSSADLSCDSRVNSDYETDGEGYTDGEGYTDVDEGPPAPALARSSEPVLEEEPRSPRDHGRASGARGAQVDRHPYHSQGRQDSMRTYGQEALKKKFTRARDVESSDEDGYDWGPATDL