I've faced several times the same situation lately in 6 max games with AKo.
Cut off or MP raise at 2.5BB, I do 3 bet from Button at 10BB and BB or SB 4 bet from 28 to 30 BB.
Initial preflop raiser Fold, action is to me. We both are 100BB deep or slightly over.
This is happening in NL10, and 4 bet is from unknown.
What would be your decision?
Fold / Call / 5 bet or shove?
Many thanks for your feedback.