Transcriptional regulator (lacking a basic DNA binding domain) which negatively regulates the basic helix-loop-helix (bHLH) transcription factors by forming heterodimers and inhibiting their DNA binding and transcriptional activity. Implicated in regulating a variety of cellular processes, including cellular growth, senescence, differentiation, apoptosis, angiogenesis, and neoplastic transformation. Inhibits skeletal muscle and cardiac myocyte differentiation. Regulates the circadian clock by repressing the transcriptional activator activity of the CLOCK-ARNTL,BMAL1 heterodimer .
Nucleotide sequence of the cDNA encoding human helix-loop-helix Id-1 protein identification of functionally conserved residues common to Id proteins.Deed R.W., Jasiok M., Norton J.D.Biochim. Biophys. Acta 1219:160-162(1994)
Research Topic:Cancer