Anti-mtTFA TFAM Antibody Picoband® (monoclonal, 4D9)

TFAM (Transcription factor A, mitochondrial), also known as TCF6 or TCF6L2, is a 162-amino acid protein that activates transcription of each mitochondrial DNA (mtDNA) strand by binding to an element of approximately 30 nucleotides present in both the light-strand and the heavy-strand promoters. By Southern blot analysis of restriction enzyme digests of human/Chinese hamster somatic cell hybrid lines, Milatovich et al. (1992) mapped TFAM sequences, which they called MTTF1, to 3 different chromosomes: chromosomes 10, 7p, and 11q. By PCR-based screening of a somatic cell hybrid panel and by fluorescence in situ hybridization, Scott (2007) stated that the sequences mapped to chromosomes 7p (TCF6L1) and 11q (MTTF1, or TCF6L3) are pseudogenes. Larsson et al. (1997) mapped the mouse mitochondrial transcription factor A gene (Tfam) to the central part of mouse chromosome 10. This region exhibits syntenic homology with human 10q21. Mitochondrial transcription factor A is a key activator of mitochondrial transcription in mammals. It also has a role in mitochondrial DNA replication, since transcription generates an RNA primer necessary for initiation of mtDNA replication.

Transcription factor A, mitochondrial; mtTFA; Mitochondrial transcription factor 1; MtTF1; Transcription factor 6; TCF-6; Transcription factor 6-like 2; TFAM; TCF6, TCF6L2

A synthetic peptide corresponding to a sequence at the N-terminus of human mtTFA, different from the related mouse and rat sequences by five amino acids.

Widely expressed at low level. Expressed in heart, brain, skeletal muscle, placenta, pancreas, spleen, prostate, mall intestine, colon, peripheral blood, leukocytes, bone marrow and fetal liver.Highly expressed in testes.

Binds to the mitochondrial light strand promoter and functions in mitochondrial transcription regulation (PubMed:29445193) . Required for accurate and efficient promoter recognition by the mitochondrial RNA polymerase. Promotes transcription initiation from the HSP1 and the light strand promoter by binding immediately upstream of transcriptional start sites. Is able to unwind DNA. Bends the mitochondrial light strand promoter DNA into a U-turn shape via its HMG boxes. Required for maintenance of normal levels of mitochondrial DNA. May play a role in organizing and compacting mitochondrial DNA.

1. Larsson, N.-G., Oldfors, A., Garman, J. D., Barsh, G. S., Clayton, D. A. Down-regulation of mitochondrial transcription factor A during spermatogenesis in humans. Hum. Molec. Genet. 6: 185-191, 1997. 2. Milatovich, A., Parisi, M. A., Poulton, J., Clayton, D. A., Francke, U. Sequences homologous to MTTF1, mitochondrial transcription factor 1, are located on human chromosomes 7 (7pter-cen), 10 and 11 (11cen-qter) . (Abstract) Cytogenet. Cell Genet. 58: 1924 only, 1992. 3. Scott, A. F. Personal Communication. Baltimore, Md. 9/20/2007.

Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.