  We present an analytical and computational study characterizing the
structural and dynamical properties of an active filament confined in
cylindrical channels. We first outline the effects of the interplay between
confinement and polar self-propulsion on the conformation of the chains. We
observe that the scaling of the polymer size in the channel, quantified by the
end-to-end distance, shows different anomalous behaviours at different
confinement and activity conditions. Interestingly, we show that the universal
relation, describing the ratio between the end-to-end distance of passive
polymer chains in cylindrical channels and in bulk is broken by activity.
Finally, we show that the long-time diffusion coefficient under confinement can
be rationalised by an analytical model, that takes into account the presence of
the channel and the elongated nature of the polymer.
