TCDB is operated by the Saier Lab Bioinformatics Group

9.B.244.  The Uncharacterized Bacterial Protein-3 (UBP3) Family 

This family includes proteins from a variety of prokaryotes, both cultured and unculturable bacteria.  They are of ~ 210 - 280 aas with 6 TMSs.  In BLAST searches, they bring up various transporters of known function such as ABC transporters and inorganic phosphate carriers with poor scores.  Glycosyl transferases do not come up.  Therefore this family may be an uncharacterized family of transport proteins.