Q9QXY1
uniprot
Q9QXY1
canonical
amino_acid_sequence
MEELTIWEQHTATLYKDPRRGFGIAVSGGHDRASGSVVVSDVVPGSPAEGRLRTGDHIVMVNGVSVENVTSAFAIQILKTCTKTANVTVKRPRRVQLPATKASPASGHQLSDQEEADHGRGYEGDSSSGSGRSWGERSRRSRAGRRGRVGSHGRRSSGGGSEANGLDLVSGYKRLPKQDVLMRPLKSVLVKRRNSEEFGVKLGSQIFIKHITESGLAARNHGLQEGDLILQINGVSSANLSLSDTRRLIEKSEGELTLLVLRDSGQFLVNIPPAVSDSDSSLMEDISDLTSELSQAPPSHVPPPPLKGQRSPEDSQTDSPVETPQPRRRERSVNSRAIAEPESPGESRYDIYRVPSRQSLEDRGYSPDTRVVSFPKGASIGLRLAGGNDVGIFVSGVQAGSPADGQGIQEGDEILQVNGMPFRNLTREEAVQFLLGLPPGEDMELVTQSKTGHSLRRWSQSRVGDSFYIRTHFELEPSPPYGLGFTRGDVFHVVDTLYPGSGPGHGHSSHGGLWLAARMGRDLREQERGVIPNQSRAEQLASLEAAQRAAGVGPGASVGSNPRAEFWRLRSLRRGTKKASTQRSREDLSALTRQGHYPPYERVVLREASFKRPVVILGPVADIAMKKLTTEMPEEFEIAESMSRTDSPSKIIKLDTVRVIAERDKHALLDVTPSAIERLNYVQYYPIVIFCAPESRPALKALREWLAPASRRSSRRLYAQAQKLQKHSGHLFTATIPLHGTSDSWYQEVKAVIQQQQARPIWTAEDQLNSSSEDLDLTGHGLAASSGDLSCDSRTNSDYEDTDGEGAYTDREGGPQDVDEEVAPTALARSSEPVWVDDHQGLMGHGTTITDKWETQADSHYTQDQRRQDSMRTYKHEALRKKFTRARDVESSDDEGYDWGPATDL
uniprot
proteins
function
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 in 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). {ECO:0000250|UniProtKB:O62683, ECO:0000250|UniProtKB:O95049, ECO:0000269|PubMed:17000770, ECO:0000269|PubMed:18172007, ECO:0000269|PubMed:21411630}.
uniprot
proteins
mass_dalton
99324
uniprot
proteins
post_translational_modification
PTM: Phosphorylated (By similarity). {ECO:0000250|UniProtKB:O62683}.
uniprot
proteins
protein_family
MAGUK family
uniprot
proteins
pubmed
10601346
uniprot
proteins
pubmed
14622136
uniprot
proteins
pubmed
17000770
uniprot
proteins
pubmed
17242355
uniprot
proteins
pubmed
18172007
uniprot
proteins
pubmed
19538286
uniprot
proteins
pubmed
21183079
uniprot
proteins
pubmed
21411630
uniprot
proteins
sequence_length
905
uniprot
proteins
subcellular_location
SUBCELLULAR LOCATION: Cell membrane {ECO:0000269|PubMed:21411630}; Peripheral membrane protein {ECO:0000269|PubMed:21411630}; Cytoplasmic side {ECO:0000269|PubMed:21411630}. Cell junction, tight junction {ECO:0000269|PubMed:10601346, ECO:0000269|PubMed:14622136, ECO:0000269|PubMed:19538286, ECO:0000269|PubMed:21411630}. Nucleus {ECO:0000250|UniProtKB:O95049}. Note=Exhibits predominant nuclear expression in proliferating cells but is exclusively junctionally expressed after confluence is reached (By similarity). Shows an epithelial-specific tight junction localization in a Tjp1/Tjp2-dependent fashion (PubMed:21411630). {ECO:0000250|UniProtKB:O95049, ECO:0000269|PubMed:21411630}.
uniprot
proteins