6ajk

Structural highlights

Disease

[TFB1M_HUMAN] Mitochondrial non-syndromic sensorineural deafness. Variations in TFB1M may influence the clinical expression of aminoglycoside-induced deafness caused by the A1555G mutation in the mitochondrial 12S rRNA.

Function

[TFB1M_HUMAN] S-adenosyl-L-methionine-dependent methyltransferase which specifically dimethylates mitochondrial 12S rRNA at the conserved stem loop. Also required for basal transcription of mitochondrial DNA, probably via its interaction with POLRMT and TFAM. Stimulates transcription independently of the methyltransferase activity.^{[1] [2] [3]}

References

1. ↑ McCulloch V, Seidel-Rogol BL, Shadel GS. A human mitochondrial transcription factor is related to RNA adenine methyltransferases and binds S-adenosylmethionine. Mol Cell Biol. 2002 Feb;22(4):1116-25. PMID:11809803
2. ↑ Falkenberg M, Gaspari M, Rantanen A, Trifunovic A, Larsson NG, Gustafsson CM. Mitochondrial transcription factors B1 and B2 activate transcription of human mtDNA. Nat Genet. 2002 Jul;31(3):289-94. Epub 2002 Jun 17. PMID:12068295 doi:http://dx.doi.org/10.1038/ng909
3. ↑ McCulloch V, Shadel GS. Human mitochondrial transcription factor B1 interacts with the C-terminal activation region of h-mtTFA and stimulates transcription independently of its RNA methyltransferase activity. Mol Cell Biol. 2003 Aug;23(16):5816-24. PMID:12897151