Personally think this is a pretty clear fold. Surprised how many people above disagree.
why is it a clear fold, how often do you think he has a straight vs Ak/AA or a bluff ?
is he bet calling the riv with AA ? if so we can prob c/c cos he'll be bluffing alot on this runout then too.
david how many hands does he 3bet vs utg1 that includes a 5?
You suggested that we should raise 'pretending we made a straight', it just doesn't look plausible given we opened and villain 3bet.
Looks more likely that villain has either an overpair to the board (which has a 50/50 chance of beating us) or AK which is definitely beating us.
In the absence of any live feel I'd say it's a call at most, being wrong isn't horribly damaging given that we're so deep and being right would move us up the pecking order in our bid to be Table Captain.
I quite like the idea of leading the river, because us having AK is way more plausible than having a 5 but check call feels more appropriate