Dbl-related oncoproteins are guanine nucleotide
exchange factors (GEFs) specific for Rho-family
GTPases and typically possess tandem Dbl (DH) and
pleckstrin homology (PH) domains that act in concert
to catalyze exchange. The exchange activities of
many Dbl-proteins are regulated by phosphorylation or
constitutively activated by truncations preceding
their DH domains. However, exact mechanisms of
regulation remain poorly understood. The current
literature regarding the activation and inhibition of
the exchange activity of the human Dbl-family
proteins is reviewed here, with a focus on general
mechanisms of regulation common to many of these
proteins.
exchange factors (GEFs) specific for Rho-family
GTPases and typically possess tandem Dbl (DH) and
pleckstrin homology (PH) domains that act in concert
to catalyze exchange. The exchange activities of
many Dbl-proteins are regulated by phosphorylation or
constitutively activated by truncations preceding
their DH domains. However, exact mechanisms of
regulation remain poorly understood. The current
literature regarding the activation and inhibition of
the exchange activity of the human Dbl-family
proteins is reviewed here, with a focus on general
mechanisms of regulation common to many of these
proteins.