9.B.283. The Uncharacterized Small 3 TMS Protein (US3P) Family The US3P family consists of a large number of small bacterial proteins with sizes < 100 residues and 3 TMSs. Their functions are unknown.
Examples:
TC#	Name	Organismal Type	Example
9.B.283.1.1	Uncharacterized protein of 97 aas and 3 TMSs.		UP of Stenotrophomonas maltophilia

9.B.283.1.2	Uncharacterized protein of 91 aas and 3 TMSs.		UP of Duganella sacchari

9.B.283.1.3	Uncharacterized Iron-regulated inner membrane protein of 84 aas and 3 TMSs.		UP of Shewanella oneidensis

Examples:
TC#	Name	Organismal Type	Example
9.B.283.2.1	Uncharacterized protein of 109 aas and 4 TMSs in a 1 + 3 TMS arrangement. Shows considerable sequence similarity with 1.A.77.3.32.		*UP of Tenacibaculum* sp.**

9.B.283.2.2	Uncharacterized protein of 110 aas and 4 TMSs.		UP of Tenacibaculum mesophilum

9.B.283.2.3	Uncharacterized protein of 110 aas and 4 TMSs.		UP of Pedobacter hartonius

Examples:
TC#	Name	Organismal Type	Example
9.B.283.3.1	DUF3325 homologue of 108 aas and 4 TMSs. Shows appreciable similarity to 1.E.40.2.1.		DUF3325 protein of Sphingobium lactosutens

9.B.283.3.2	DUF3325 domain-containing proteinof 108 aas and 4 TMSs in a 1 + 3 TMS arrangement.		DUF3325 protein of Algiphilus aromaticivorans

9.B.283.3.3	DUF3325 domain-containing proteinof 107 aas and 4 TMSs in a 1 + 3 arrangement.		DUF3325 domain protein of Shewanella algae

9.B.283.3.4	DUF3325 domain-containing proteinof 109 aas and 4 TMSs.		DUF 3325 protein of Pseudomonas viridiflava