The proteins, known as DDX3X and DDX3Y, are part of a group of proteins called DEAD-box helicases, which play a crucial role in various cellular processes, including RNA metabolism and gene regulation. Dysregulation of these proteins has been linked to several human diseases.
In a study published in the journal "Nature Communications," researchers from the University of Texas at Austin and the University of Nebraska-Lincoln focused on DDX3X and DDX3Y, which are highly similar proteins found in humans and other mammals.
Using a combination of biochemical and cellular experiments, the team discovered that DDX3X and DDX3Y form a complex and work together to regulate the stability and translation of specific messenger RNAs (mRNAs), which carry genetic instructions from DNA to the ribosomes for protein synthesis.
"We found that DDX3X and DDX3Y bind to the same mRNAs and cooperate to control their translation," explained Dr. Jason W. Cary, a professor in the Department of Molecular Biosciences at the University of Texas at Austin and a corresponding author of the study. "This partnership ensures that the mRNAs are translated into functional proteins at the right time and place."
The researchers further demonstrated that disrupting the DDX3X-DDX3Y complex impaired cellular functions and led to the accumulation of misfolded proteins, which can contribute to cellular stress and disease. Notably, they found that the depletion of DDX3X and DDX3Y in human cells resulted in increased cell death and reduced cell growth.
The study provides new insights into the molecular mechanisms underlying cellular health and disease. By understanding how DDX3X and DDX3Y regulate gene expression, scientists may be able to develop therapeutic strategies to modulate their activities for the treatment of diseases characterized by dysregulated RNA metabolism, such as cancer and neurodegenerative disorders.
"Targeting the DDX3X-DDX3Y complex could potentially lead to the development of novel therapies for diseases where RNA metabolism is disrupted," said Dr. Cary. "Further research is needed to explore the therapeutic potential of modulating these proteins and their interactions."
