  We calculate the photon production cross-section in $pA$ collisions under the
assumption that the nucleus has reached the saturation regime, while the proton
can be described by the standard parton distribution functions. We show that
due to the strong classical field $O(1/g)$ of the nucleus, bremsstrahlung
diagrams become dominant over the direct photon diagrams. In particular, we
show that $\gamma-$jet transverse momentum spectrum and correlations are very
sensitive to gluon saturation effects in the nucleus.
