TCDB is operated by the Saier Lab Bioinformatics Group

9.B.58 The Uncharacterized Bacterial 4 TMS Protein (UB4P) Family. 

Nothing is know about the functions of members of the UB4P Family.  These proteins occur in mycoplasma species. They show some similarity with the N-terminal domains of some guanylate cyclases of family 9.B.34 as well as the N-terminal domains of ABC transport proteins of TC family 3.A.1.134.