[en] A set of density dependent nucleon-nucleon (N-N) interactions has been examined in nuclear matter calculations by varying spin-isospin contributions. Two sets of potentials have been considered. One having a density dependent δ-function type short range part followed by one term long range Gaussian part while the other having a density dependent δ-function part followed by two Gaussian terms. The strength parameters of the potential have been fitted to the saturation properties of nuclear matter, i.e. binding energy per particle of 15.5 MeV at k_F = 1.35 fm^-1. Several sets of these two potentials have been generated by varying the strength parameter M of Majorana exchange operator P_M . It is seen that M indirectly controls the spin, iso-spin contribution to the interaction potential and thus affects the nuclear matter properties such as compressibility and symmetry energy considerably, while variation of these quantities with the range parameter μ for given M is moderate at low M values while at higher M values it is quite large. (author)