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In molecular biology, the BSD domain is an approximately 60 amino acid long protein domain named after the BTF2-like transcription factors, Synapse-associated proteins and DOS2-like proteins in which it is found. Additionally, it is also found in several hypothetical proteins. The BSD domain occurs in one or two copies in a variety of species ranging from primal protozoan to human. It can be found associated with other domains such as the BTB domain or the U-box in multidomain proteins. The function of the BSD domain is as yet unknown. Secondary structure prediction indicates the presence of three predicted alpha helices, which probably form a three-helical bundle in small domains. The third predicted helix contains neighbouring phenylalanine and tryptophan residues - less common amino acids that are invariant in all the BSD domains identified and that are the most striking sequence features of the domain.〔 Some proteins known to contain one or two BSD domains are listed below: * Mammalian TFIIH basal transcription factor complex p62 subunit (GTF2H1). * Yeast RNA polymerase II transcription factor B 73 kDa subunit (TFB1), the homologue of BTF2. * Yeast DOS2 protein, involved in single-copy DNA replication and ubiquitination. * Drosophila synapse-associated protein SAP47. * Mammalian SYAP1. * Various ''Arabidopsis thaliana'' (Mouse-ear cress) hypothetical proteins. ==References== BSTA Promotes mTORC2-Mediated Phosphorylation of Akt1 to Suppress Expression of FoxC2 and Stimulate Adipocyte Differentiation. Yao Y, Suraokar M, Darnay BG, Hollier BG, Shaiken TE, Asano T, Chen CH, Chang BH, Lu Y, Mills GB, Sarbassov D, Mani SA, Abbruzzese JL, Reddy SA. Sci Signal. 2013 Jan 8;6(257):ra2. doi: 10.1126/scisignal.2003295. PMID 23300339 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「BSD domain」の詳細全文を読む スポンサード リンク
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