  We present a quark-diquark model for the nucleons where the light front wave
functions are constructed from the soft-wall AdS/QCD prediction. The model is
consistent with quark counting rule and Drell-Yan-West relation. The model
reproduces the scale evolution of unpolarized PDF of proton for a wide range of
energy scale. Helicity and transversity distributions for the proton predicted
in this model agree with phenomenological fits. The axial and tensor charges
are also shown to agree with the experimental data. The model can be used to
evaluate distributions like GPDS, TMDs etc. and their scale evolutions.
