Enhanced product stability in the hammerhead ribozyme.

Abstract excerpt

The rate of dissociation of P1, the 5' product of hammerhead cleavage, is 100-300-fold slower in full-length hammerheads than in hammerheads that either lack or have disrupting mutations in the loop-loop tertiary interaction. The added stability requires the presence of residue 17 at the 3' terminus of P1 but not the 2', 3' terminal phosphate. Since residue 17 is buried within the catalytic core of the hammerhead...

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