AK against constant 3-better

[Heine]

Ok, so the read is, fairly tight player 23/18 over 150+hands. He three bets like its his job. I figured he'd lay down AK, and anything below QQ (and possibly QQ). This is the third or 4th 3-bet i've faced in my last 6 raises.

My image is tight, i've been catching some cards and basically taking down most pots with c-bets.

I'm new to this level, ergo the basic preflop question and help needed.

So given the read, is this a bad 4-bet?

FullTiltPoker (6 max) - $0.50/$1

Seat 1: Hero ($234.10)
Seat 2: SB ($196.30)
Seat 3: Villian ($126.85)
Seat 4: UTG ($36.80)
Seat 5: UTG+1 ($114.30)
Seat 6: SampsonSimps ($25.40), is sitting out
Cards1978 posts the small blind of $0.50
Blomiz posts the big blind of $1
The button is in seat #1
*** HOLE CARDS ***
Dealt to Heine [A[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/diamond.gif[/img]]
UTG calls $1
mattk20 folds
Hero raises to $4.50
SB calls $4
Villian raises to $21
UTG folds
Heine raises to $140
SB folds
Villian $105.85, and is all in