NL25 AKs 3bet pot, deep, turned TPTK

[checktheriver]

Villain is 47/17/1.8, seems to call too much overall.
If we were not so deep I'd probably shove this turn but here I'm not so sure which line I should take, and stacking off with TPTK for 150BB doesn't seem very good.


PokerStars No-Limit Hold'em, $0.25 BB (4 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Button ($34.65)
Hero ($46.50)
BB ($24.65)
UTG ($38.25)

Preflop: Hero is SB with A[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">UTG raises to $1</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $3.75</font>, <font color="#666666">1 fold</font>, UTG calls $2.75.

Flop: ($7.75) J[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $4.75</font>, UTG calls $4.75.

Turn: ($17.25) A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero ??