Tetratricopeptide Repeat Domain Protein 6 (TTC6)

The tetratricopeptide repeat (TPR) motif is a degenerate, 34 amino acid sequence found in many proteins and acts to mediate protein-protein interactions in various pathways. At the sequence level, there can be up to sixteen tandem TPR repeats, each of which has a helix-turn-helix shape that stacks on other TPR repeats to achieve ligand binding specificity. TTC6 (Tetratricopeptide repeat protein 6) is a 520 amino acid protein that contains thirteen TPR repeats. The gene encoding TTC6 maps to human chromosome 14, which houses over 700 genes and comprises nearly 3.5% of the human genome. Chromosome 14 encodes the presinilin 1 (PSEN1) gene, which is one of the three key genes associated with the development of Alzheimer’s disease (AD).