Dbl Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Dbl Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Overview
DBL (also known as MCF2) is a proto-oncogene that encodes a Rho guanine nucleotide exchange factor (RhoGEF). DBL was originally identified as an oncogene from a diffuse B-cell lymphoma. The protein functions as a specific activator of Rho GTPases, particularly RhoA, Rac1, and Cdc42, which are critical regulators of the actin cytoskeleton.
Function
Rho GTPase Regulation
DBL is a prototypic RhoGEF that catalyzes the exchange of GDP for GTP on Rho GTPases:
RhoA activation — leads to stress fiber formation and contractility
Rac1 activation — promotes lamellipodia and membrane ruffling
Cdc42 activation — induces filopodia formation
Neuronal Functions
In [neurons](/entities/neurons), DBL and related RhoGEFs regulate:
The study of Dbl Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
References
[@cerione1994]: [Cerione et al., DBL as a Rho-specific guanine nucleotide exchange factor (1994)](https://doi.org/10.1091/mbc.5.3.213) [@rossman2005]: [Rossman et al., Rho GTPase signaling by Dbl family guanine nucleotide exchange factors (2005)](https://doi.org/10.1016/j.tcb.2005.03.004) [@hall2010]: [Hall & Lalli, Rho GTPases in neuronal development and function (2010)](https://doi.org/10.1016/j.tics.2010.06.001) [@nakayama2012]: [Nakayama et al., DBL mutations in cancer (2012)](https://doi.org/10.1038/onc.2012.38) [@stankiewicz2014]: [Stankiewicz & Linseman, Rho family GTPases in synaptic plasticity and neurological disorders (2014)](https://doi.org/10.1016/j.neuro.2014.02.014) [@liu2016]: [Liu et al., DBL in neuronal morphogenesis (2016)](https://doi.org/10.1016/j.neuron.2016.03.015) [@zhang2018]: [Zhang &Scopeci, Rho GTPase signaling in neurodegeneration (2018)](https://doi.org/10.1007/s00018-018-2829-5) [@madigan2019]: [Madigan et al., Dbl family GEFs in neurological disease (2019)](https://doi.org/10.1016/j.tics.2019.01.008)