9.B.284.  The 4 TMS Uncharacterized Bacterial Protein-20 (UBP20) Family 

The proteins of this family were identified while characterizing the Heliorhodopsin Family (TC#3.E.3). When 9.B.284.1.1 was TC BLASTed,  striking similarities with the two 7 TMS protein with TC# 3.E.3.1.1 and 2 as can be seen by running a TC BLAST run with this protein. For example, TC BLASTing 9.B.284.1.1 gave hits with 3.E.3.1.1 and 3.E.3.1.2 with residues 53 - 145 aligning with residues 63 - 153 of the two similar Heliorhodopsins. However, homology could not be established using our traditional procedures.  Therefore, we have put these 4 TMS proteins into the current family (9.B.284).

This family belongs to the .


TC#NameOrganismal TypeExample

Uncharacterized protein of 149 aas and 3 TMSs.

UP of Enterobacter cloacae


Uncharacterized protein of 171 aas and 4 TMSs.

UP of Brenneria goodwinii


Uncharacterized protein of 138 aas and 3 TMSs.

UP of Bathymodiolus thermophilus thioautotrophic gill symbiont


Uncharacterized 4 TMS homologue of Heliorhodopsins of 150 aas.

UP of Citrobacter braakii


Uncharacterized protein of 161 aas and 4 TMSs.

UP of Geopsychrobacter electrodiphilus


Uncharacterized protein of 149 aas and 4 TMSs.

UP of E. coli


Uncharacterized protein of 101 aas and 3 TMSs.  Could be a fragment.

UP of Chryseobacterium treverense


Uncharacterized protein of 129 aas and 4 TMSs.

UP of Pedobacter sp. R20-19