  We report on the observation of photogalvanic effects in twisted bilayer
graphene (tBLG) with a twist angle of 0.6{\deg}. We show that excitation of
tBLG bulk causes a photocurrent, whose sign and magnitude are controlled by
orientation of the radiation electric field and the photon helicity. The
observed photocurrent provides evidence for the reduction of the point group
symmetry in low twist-angle tBLG to the lowest possible one. The developed
theory shows that the current is formed by asymmetric scattering in gyrotropic
tBLG. We also detected the photogalvanic current formed in the vicinity of the
edges. For both, bulk and edge photocurrents, we demonstrate the emergence of
pronounced oscillations upon variation of the gate voltage. The gate voltages
associated with the oscillations coincide well with peaks in resistance
measurements. These are well explained by inter-band transitions between a
multitude of isolated bands in tBLG.
