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FEBS Lett. 1986 Nov 24;208(2):301-4.

The glycine-rich loop of adenylate kinase forms a giant anion hole.


The conformation of the glycine-rich loop of adenylate kinase is described in detail. It forms a giant anion hole for a sulfate ion, which presumably mimicks a nucleotide phosphoryl group. This loop had been called flexible, because at pH values of 6 or below it is displaced in the crystal. In the region of this loop the adenylate kinases are probably homologous to the p21 proteins. Is is known that a mutation in this loop at residue 12 of p21 causes cell transformation and therefore cancer. Other potentially homologous proteins are indicated.

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