  In the minimal SU(5) SUSY GUT $d =5$ operators lead to $p\to K^+ \nu$ decay
with the proton life time of the order of $10^{28}$ years for the natural
choice of the parameters of the theory. This value is in strong contradiction
with experimental bound $\tau_{p\to K\nu} > 10^{32}$ years. $d=5$ operators are
induced by colored Higgsino exchanges and are closely (through SU(5) and super
symmetry) related to another wrong prediction of SU(5) SUSY GUT: $m_d /m_s =
m_e /m_{\mu}$. We demonstrate how in the model where reasonable pattern of
quark and lepton masses and CKM mixing angles are obtained proton decay can be
suppressed and proton life time can be close to the present experimental bound.
