This is a domain of unknown function. Studies of the TA0095 gene product indicate that this 96-residue hypothetical protein from Thermoplasma acidophilum is a member of the COG4004 orthologous group of unknown function found in Archaea bacteria. The structure displays an alpha/beta two-layer sandwich architecture formed by three alpha-helices and five beta-strands. Furthermore, structural homologs indicate that the TA0095 structure belongs to the TBP-like fold [1].

1: Solution structure of the hypothetical protein TA0095 from Thermoplasma acidophilum: a novel superfamily with a two-layer sandwich architecture. Leon E, Yee A, Ortiz AR, Santoro J, Rico M, Jimenez MA; Protein Sci. 2007;16:2278-2286. PMID:17766377