Seroatlas · Protein domains

Tetratricopeptide repeat

IPR019734

Definition

The tetratrico peptide repeat region (TPR) is a structural motif present in a wide range of proteins [[cite:PMID:7667876], [cite:PMID:9482716], [cite:PMID:1882418]]. It mediates protein-protein interactions and the assembly of multiprotein complexes PMID:14659697. The TPR motif consists of 3-16 tandem-repeats of 34 amino acids residues, although individual TPR motifs can be dispersed in the protein sequence. Sequence alignment of the TPR domains reveals a consensus sequence defined by a pattern of small and large amino acids. TPR motifs have been identified in various different organisms, ranging from bacteria to humans. Proteins containing TPRs are involved in a variety of biological processes, such as cell cycle regulation, transcriptional control, mitochondrial and peroxisomal protein transport, neurogenesis and protein folding. The X-ray structure of a domain containing three TPRs from protein phosphatase 5 revealed that TPR adopts a helix-turn-helix arrangement, with adjacent TPR motifs packing in a parallel fashion, resulting in a spiral of repeating anti-parallel α-helices PMID:14659697. The two helices are denoted helix A and helix B. The packing angle between helix A and helix B is ~24 degrees within a single TPR and generates a right-handed superhelical shape. Helix A interacts with helix B and with helix A' of the next TPR. Two protein surfaces are generated: the inner concave surface is contributed to mainly by residue on helices A, and the other surface presents residues from both helices A and B.

136 human proteins with this domain

Each is a reviewed human protein in the Seroatlas serome and a potential autoantibody target; this domain groups them into one antibody-relevant category. Every entry links to its own record.

Download CSV (136 proteins: gene, accession, name)

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