Hit my losing straight, when to fold

[hate]

Both UTG+1 and MP1 are LPP

Hero is BB with 4/images/graemlins/heart.gif, A/images/graemlins/club.gif

PRE-FLOP
UTG folds, UTG+1 calls $0.50, UTG+2 folds, MP1 calls $0.50, MP2 calls, MP3 folds, CO folds, Button folds, SB completes, <font color="red">Hero checks</font>.

FLOP [ 8/images/graemlins/spade.gif, 6/images/graemlins/diamond.gif, 7/images/graemlins/diamond.gif ]
SB checks, Hero checks, UTG+1 checks, MP1 checks, MP2 checks.

TURN [ 5/images/graemlins/club.gif ]
<font color="red"> SB bets</font>, <font color="red">Hero calls</font>, UTG+1 calls, MP1 calls, MP2 folds.

RIVER [ Q/images/graemlins/spade.gif ]
SB checks, Hero checks, <font color="red">UTG+1 bets</font>, <font color="red">MP1 raises</font>, Hero calls, UTG+1 calls.

When's the proper time to fold this?

[Megenoita]

Turn.

M

[Ianco15]

Turn. But if you called turn still fold on river.

[jrz1972]

You can bet the turn if it's checked to you, but when somebody bets in front of you its more likely to be a 9 than another 4. The pot is miniscule. Fold the turn.