High impact information on UPK2

• Previous studies indicate that the outer leaflet of AUM is composed of crystalline patches of 12-nm protein particles, and that bovine AUMs contain three major proteins: the 27- to 28-kD uroplakin I, the 15-kD uroplakin II and the 47-kD uroplakin III [1].
• The formation of UPII homodimers is sensitive, however, to octyl glucoside that can solubilize the AUMs [2].
• The cDNA-deduced amino acid sequence revealed that UPII is synthesized as a precursor protein containing a cleavable signal peptide of approximately 26 amino acids, a long pro-sequence of approximately 59 residues harboring three potential N-glycosylation sites, and the mature polypeptide of 100 residues [3].
• Finally, we showed that genomic sequences cross-hybridizing with bovine UPII cDNA are present in many mammals suggesting that UPII performs a highly conserved function in the terminally differentiated cells of mammalian urinary bladder epithelium [3].
• High pressure liquid chromatography purification of UP1 and UP2, two related single-stranded nucleic acid-binding proteins from calf thymus [4].

Biological context of UPK2

• Solid-phase sequencing of three tryptic peptides that together account for 9% of the 39,500-dalton UP2 protein demonstrate that there is a high degree of sequence homology between UP1 and UP2 [4].

Associations of UPK2 with chemical compounds

• The blocked NH2 terminus, amino acid composition, particularly with regard to its high glycine content and the presence of dimethylarginine, and molecular weight of UP2 suggest this protein is related to proteins that have previously been found associated with heterogeneous RNA [4].

References