  It is shown that standard constituent quark models produce $(\bar c c qqq)$
hidden-charm pentaquarks, where $c$ denotes the charmed quark and $q$ a light
quark, which lie below the lowest threshold for spontaneous dissociation and
thus are stable in the limit where the internal $\bar c c$ annihilation is
neglected. The binding is a cooperative effect of the chromoelectric and
chromomagnetic components of the interaction, and it disappears in the static
limit with a pure chromoelectric potential. Their wave function contains color
sextet and color octet configurations for the subsystems and can hardly be
reduced to a molecular state made of two interacting hadrons. These pentaquark
states could be searched for in the experiments having discovered or confirmed
the hidden-charm meson and baryon resonances.
