The present invention is directed to novel PRO1475 polypeptides and to nucleic acid molecules encoding those polypeptides. Also provided herein are vectors and host cells comprising those nucleic acid sequences, chimeric polypeptide molecules comprising the PRO1475 polypeptides of the present invention fused to heterologous polypeptide sequences, antibodies which bind to the PRO1475 polypeptides of the present invention and to methods for producing the PRO1475 polypeptides of the present invention.