nl200 Button versus blinds situation with AK

[Derrick]

Im sorry if this has been asked before. Would be nice if someone could help. Very basic situation in 6-max nl200. You have sat down on table and played few rounds and been fairly active but not getting out of the line at all. Raising few hands and 3-betting from blinds to button/co raises couple of times. So..everyone folds to you and you get AKo to button and you raise, solid regular with big stack from small blind 3-bets (who knows I dont have to have that good of a hand for button raise,no other reads) you decide to 4-bet. He shoves. Now my question is with what amount you are willing to put it all in and with what you'll fold,whats your standard?

ps. I had 135bb when this actually happened..