  We examine the impact of Coulomb electron-electron interaction on transport
in a junction with a quantum dot described by Kondo Hamiltonian. We analyze the
Fermi liquid regime and consider the limit of zero temperature. With the help
of Keldysh technique we calculate the non-linear current and shot noise as a
function of applied voltage. We show that Coulomb interaction markable
influences the universal effective charge of current-carrying particles e*=5/3e
which can be measured in shot-noise experiments. The electron-electron
interaction modifies this universal value by a factor (e*=5/3eF) which is less
then one and also voltage dependent.
