9.B.236. The Unculturable Bacterial Uncharacterized 5 TMS Protein-1 (UBUP1) Family This family of proteins is found only in unculturable bacteria but not in any of the well characterized bacteria. The proteins are all small (~150 - 180 aas and have 5 TMSs in a 2 + 2 + 1 arrangement. The function is not know. However they may be very distantly related to MgtC family members (TC# 9.B.20) as well as Mg²⁺ channels (TC# 1.A.77), suggesting a potential role in magnesium transport.
Examples:
TC#	Name	Organismal Type	Example
9.B.236.1.1	Uncharacterized protein of 187 aas and 5 TMSs in a 2 + 2 + 1 arrangement.		UP of Beckwithbacteria bacterium

9.B.236.1.2	Uncharacterized protein of 175 aas and 5 TMSs.		UP of candidate division WWE3 bacterium

9.B.236.1.3	Uncharacterized protein of 177 aas and 5 TMSs.		UP of Microgenomates bacterium

9.B.236.1.4	Uncharacterized protein of 176 aas and 5 TMSs.		UP from a groundwater metagenome

9.B.236.1.5	Uncharacterized protein of 153 aas and 5 TMSs.		UP of Candidatus Gottesmanbacteria bacterium

9.B.236.1.6	Uncharacterized protein of 158 aas and 5 TMSs.		UP of Candidatus Pacebacteria bacterium

9.B.236.1.7	Uncharacterized protein of 181 aas and 5 TMSs.		UP of candidate division WWE3 bacterium