  Based on the high statistical data of the CLAS Collaboration on $\gamma p \to
\phi p$ reaction in the center-of-mass energy range of 2.2 GeV to 2.8 GeV, we
investigate the possible existence of strange molecular partners of $P_c$
states, i.e., $N^*(2080)$ and $N^*(2270)$ as $K^*\Sigma$ and $K^*\Sigma^*$
molecular states. In addition to the t-channel Pomeron exchange, t-channel
meson exchange including pseudo-scalar meson $(\pi,\eta)$, scalar meson
$(\sigma, a_0(980), f_0(980))$, axial-vector meson $f_1(1285)$, tensor meson
$f_2(1270)$, as well as s- and u-channel proton exchange, including s-channel
$N^*(2080)$ and $N^*(2270)$ states can fit the data very well. The fitted
coupling constants of these $N^*$ molecular states to $p\phi$ and $\gamma p$
are consistent with the results directly calculated from the relevant hadronic
triangle diagrams of the molecular picture.
