The invention provides isolated anti-PCan065 antibodies that bind to PCan065. The invention also encompasses compositions comprising an anti-PCan065 antibody and a carrier. These compositions can be provided in an article of manufacture or a kit. Another aspect of the invention is an isolated nucleic acid encoding an anti-PCan065 antibody, as well as an expression vector comprising the isolated nucleic acid. Also provided are cells that produce the anti-PCan065 antibodies. The invention encompasses a method of producing the anti-PCan065 antibodies. Other aspects of the invention are a method of killing an PCan065-expressing cancer cell, comprising contacting the cancer cell with an anti-PCan065 antibody and a method of alleviating or treating an PCan065-expressing cancer in a mammal, comprising administering a therapeutically effective amount of the anti-PCan065 antibody to the mammal.