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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Amino-terminal deletions define a glutamine amide transfer domain in glutamine phosphoribosylpyrophosphate amidotransferase and other PurF-type amidotransferases.

A series of deletions was constructed in cloned Escherichia coli purF encoding glutamine phosphoribosylpyrophosphate amidotransferase. These deletions extended into the NH2 terminus of the protein and removed amino acids that are required for glutamine-dependent enzyme activity. Enzyme function, ascribed to the NH3-dependent activity, was retained in deletions that removed up to 237 amino acids. This result supports a model in which PurF-type amidotransferases contain an NH2-terminal glutamine amide transfer domain of approximately 194 to 200 amino acids fused to an aminator domain with NH3-dependent function.[1]


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