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The ankyrin repeat is a 33-residue motif in proteins consisting of two alpha helices separated by loops, first discovered in signaling proteins in yeast Cdc10 and Drosophila Notch. Domains consisting of ankyrin tandem repeats mediate protein–protein interactions and are among the most common structural motifs in known proteins. They appear in bacterial, archaeal, and eukaryotic proteins, but are far more common in eukaryotes. Ankyrin repeat proteins, though absent in most viruses, are common among poxviruses. Most proteins that contain the motif have four to six repeats, although its namesake ankyrin contains 24, and the largest known number of repeats is 34, predicted in a protein expressed by Giardia lamblia.

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  • Ankyrin repeat (en)
  • Répétition ankyrine (fr)
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  • The ankyrin repeat is a 33-residue motif in proteins consisting of two alpha helices separated by loops, first discovered in signaling proteins in yeast Cdc10 and Drosophila Notch. Domains consisting of ankyrin tandem repeats mediate protein–protein interactions and are among the most common structural motifs in known proteins. They appear in bacterial, archaeal, and eukaryotic proteins, but are far more common in eukaryotes. Ankyrin repeat proteins, though absent in most viruses, are common among poxviruses. Most proteins that contain the motif have four to six repeats, although its namesake ankyrin contains 24, and the largest known number of repeats is 34, predicted in a protein expressed by Giardia lamblia. (en)
  • Une répétition ankyrine est une configuration particulière des protéines consistant en 33 résidus d'acides aminés formant deux hélices α séparées par des boucles. Ces domaines sont très répandus, un peu chez les bactéries et les archées, mais surtout chez les eucaryotes. Ils sont absents de la plupart des virus, à l'exception des Poxviridae. Ils sont définis par leur structure et non par leur séquence dans la mesure où aucune séquence particulière n'a été associée aux répétitions ankyrine. La plupart des protéines qui contiennent ce type de structures possèdent de quatre à six répétitions ankyrine, l'ankyrine elle-même en ayant 24, le record étant probablement les 34 répétitions d'une protéine exprimée par Giardia lamblia. (fr)
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  • Ankyrin repeat domain (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Ankyrin_R_membrane-binding_domain_1N11.png
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