. "FUNCTION: Component of the asymmetric unit membrane (AUM); a highly specialized biomembrane elaborated by terminally differentiated urothelial cells. May play an important role in AUM-cytoskeleton interaction in terminally differentiated urothelial cells. It also contributes to the formation of urothelial glycocalyx which may play an important role in preventing bacterial adherence (By similarity). SUBUNIT: Heterodimer with uroplakin-1B (UPK1B). SUBCELLULAR LOCATION: Cell membrane; Single-pass type I membrane protein (Potential). Note=Heterodimer formation with UPK1B is a prerequisite to exit out of the endoplasmic reticulum (ER). ALTERNATIVE PRODUCTS: Event=Alternative splicing; Named isoforms=2; Name=1; IsoId=Q9BT76-1; Sequence=Displayed; Name=2; IsoId=Q9BT76-2; Sequence=VSP_037327; SIMILARITY: Belongs to the uroplakin-3 family. SEQUENCE CAUTION: Sequence=AAO89507.1; Type=Frameshift; Positions=210; Sequence=AAS07526.1; Type=Erroneous gene model prediction; GENE SYNONYMS:UPK3B. COPYRIGHT: Protein annotation is derived from the UniProt Consortium (http://www.uniprot.org/). Distributed under the Creative Commons Attribution-NoDerivs License."^^ . "SEQUENCE 320 AA; 33882 MW; 64A1FE268A8BB0EB CRC64;"^^ . . . . . . . . . . . "UPK3B_HUMAN"^^ . "p35"^^ . "UPK3B"^^ . "UP3b"^^ . "UPIIIb"^^ . "Uroplakin IIIb"^^ . . "MGLPWGQPHLGLQMLLLALNCLRPSLSLGEWGSWMDASSQTQGAGGPAGVIGPWAPAPLRLGEAAPGTPTPVSVAHLLSPVATELVPYTPQITAWDLEGKVTATTFSLEQPRCVFDGLASASDTVWLVVAFSNASRGFQNPETLADIPASPQLLTDGHYMTLPLSPDQLPCGDPMAGSGGAPVLRVGHDHGCHQQPFCNAPLPGPGPYREDPRIHRHLARAAKWQHDRHYLHPLFSGRPPTLGLLGSLYHALLQPVVAGGGPGAAADRLLHGQALHDPPHPTQRGRHTAGGLQAWPGPPPQPQPLAWPLCMGLGEMGRWE"^^ . "Uroplakin-3b"^^ . .