If I read you correctly, the wall is likely supporting the trusses, thus could be a load-bearing wall. Removing it may not be an option without major work. I'd check with a structural engineer...might cost you a bit, but better than having the house fall down! If it is determined not to be structural, then it can come out. If it is, then the engineer can tell you what would be needed to do it safely and keep the house intact.