Tetratricopeptide Repeat Domain 32 (TTC32) is a protein encoded by the TTC32 gene in humans. This protein is part of a larger family of proteins characterized by the presence of tetratricopeptide repeat (TPR) motifs. TPR motifs are structural motifs that consist of a degenerate 34 amino acid tandem repeat, which are found in a wide variety of proteins and play a crucial role in mediating protein-protein interactions .
The TPR motif is typically composed of a pair of antiparallel alpha helices. These motifs are found in tandem arrays of 3–16 motifs, forming scaffolds that mediate protein-protein interactions and often the assembly of multiprotein complexes . The TPR domain usually folds into a single, linear solenoid structure, which is essential for its function in various cellular processes.
Proteins containing TPR motifs are involved in a wide range of biological functions, including the regulation of the cell cycle, protein folding, and the assembly of protein complexes. For example, TPR motifs are found in the anaphase-promoting complex (APC) subunits, NADPH oxidase subunit p67-phox, hsp90-binding immunophilins, transcription factors, and mitochondrial import proteins .
The TTC32 gene, also known as Tetratricopeptide Repeat Domain 32, is a protein-coding gene. Gene Ontology (GO) annotations related to this gene include identical protein binding . An important paralog of this gene is ST13 . The TTC32 gene is located on chromosome 2 and has several aliases, including TPR Repeat Protein 32 .
Human recombinant TTC32 is used in various research applications to study protein-protein interactions and the assembly of multiprotein complexes. Understanding the structure and function of TTC32 can provide insights into its role in cellular processes and its potential implications in diseases.