#catgrip
Catgrip
Molecular binding feature
Catgrips are small cation-binding molecular features of proteins and peptides. Each consists of the main chain atoms only of three consecutive amino acid residues. The first and third main chain CO groups bind the cations, often calcium, magnesium, potassium or sodium, with no side chain involvement. Many catgrips bind a water molecule instead of a cation; it is hydrogen-bonded to the first and third main chain CO groups. Catgrips are found as calcium-binding features in annexins, matrix metalloproteinases (e.g.serralysins), subtilisins and phospholipase A2. They are also observed in synthetic peptides and in cyclic hexapeptides made from alternating D,L amino acids.
Wed 26th
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