From what I could find, AS uses gates 10 and/or 11, which are in one of the West airsides. WN is one of the East airsides, so you will have to re-clear security. The one hour connection would probably be ok, assuming the inbound is on time, but you won't have much slack time. The UA gates/lounge are in a different concourse than AS, but they are both on the west side, so there is no security between them.