TERF1 (Telomeric Repeat-Binding Factor 1) (TERF1) Human Recombinant Protein

This gene encodes a telomere specific protein which is a component of the telomere nucleoprotein complex. This protein is present at telomeres throughout the cell cycle and functions as an inhibitor of telomerase, acting in cis to limit the elongation of individual chromosome ends. The protein structure contains a C-terminal Myb motif, a dimerization domain near its N-terminus and an acidic N-terminus. Two transcripts of this gene are alternatively spliced products. [provided by RefSeq, Jul 2008]

TRF1: a telomeric repeat binding factor. Binds the telomeric double-stranded TTAGGG repeat and negatively regulates telomere length. Colocalizes with telomeric DNA in interphase and metaphase cells and is located at chromosome ends during metaphase. Involved in the regulation of the mitotic spindle. Expression is tightly regulated during the cell cycle; levels are low in G1 and S phase and increase during G2 phase and mitosis. Two splice variant isoforms have been described.

Protein type: DNA-binding

Chromosomal Location of Human Ortholog: 8q21.11

Cellular Component: nucleoplasm; chromosome, telomeric region; nuclear telomere cap complex; nuclear chromosome, telomeric region; cytoplasm; nucleolus; spindle; nucleus

Molecular Function: protein binding; protein homodimerization activity; DNA binding; protein heterodimerization activity; microtubule binding; telomeric DNA binding; double-stranded telomeric DNA binding; chromatin binding; DNA bending activity

Biological Process: response to drug; mitosis; positive regulation of mitosis; negative regulation of telomere maintenance via semi-conservative replication; positive regulation of apoptosis; positive regulation of microtubule polymerization; telomere maintenance via telomerase; positive regulation of mitotic cell cycle; negative regulation of telomerase activity; cell division; negative regulation of DNA replication; telomeric loop formation; mitotic cell cycle spindle assembly checkpoint; G2/M transition of mitotic cell cycle; age-dependent telomere shortening; telomere maintenance; negative regulation of telomere maintenance via telomerase; protein homooligomerization