Molecular Function
ankyrin repeat
Subclass of:
Protein Interaction Domains and Motifs;
Repetitive Sequences, Amino Acid;
Amino Acid Motifs
Definitions related to ankyrin repeat:
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Ankyrin Repeats are tandem modules of about 33 amino acids. The conserved domain structure has been described as side-by-side anti-parallel alpha helices connected by intervening beta hairpin motifs or as beta, alpha, alpha, beta secondary structures or as an L-shaped beta-hairpin and two alpha-helices. The repeats associate to form a higher order structure. Despite sequence variation, the domain core maintains a stable surface of contact residues to mediate protein-protein interactions. Target protein binding involves contacts by the beta hairpin tips and the helical bundle surface facing the Ankyrin groove. ANK repeats have been identified in over 1700 functionally diverse proteins, primarily from eukaryotes; no common theme among the protein targets has been identified. The Ankyrin cytoskeletal protein is composed almost entirely of these repeats.NCI ThesaurusU.S. National Cancer Institute, 2021
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Protein motif that contains a 33-amino acid long sequence that often occurs in tandem arrays. This repeating sequence of 33-amino acids was discovered in ANKYRIN where it is involved in interaction with the anion exchanger (ANION EXCHANGE PROTEIN 1, ERYTHROCYTE). Ankyrin repeats cooperatively fold into domains that mediate molecular recognition via protein-protein interactions.NLM Medical Subject HeadingsU.S. National Library of Medicine, 2021
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