  We develop a coarse-grained particle-based model to simulate membranes with
nematic liquid-crystal order. The coarse-grained particles form vesicles which,
at low temperature, have orientational order in the local tangent plane. As the
strength of coupling between the nematic director and the vesicle curvature
increases, the vesicles show a morphology transition from spherical to prolate
and finally to a tube. We also observe the shape and defect arrangement around
the tips of the prolate vesicle.
