The stem region of group A transferase is crucial for its specificity, and its alteration promotes heterologous Forssman synthase activity.

Abstract excerpt

Some stem region mutants of human blood group A transferase (hAT) possess Forssman synthase (FS) activity, but very little is known about the mechanisms responsible for this enzymatic crosstalk. We performed confocal microscopy and image analysis to determine whether different intra-Golgi localization was accountable for this acquired activity. We also performed structural modeling and mutational and normal mode...

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