ATP-dependent RNA helicase DDX5 (148-156)

ATP-dependent RNA helicase DDX5 (148-156) is a synthetic peptide fragment derived from a highly conserved region of the DDX5 protein, an essential member of the DEAD-box RNA helicase family. DDX5 plays a pivotal role in a variety of RNA metabolic processes, including pre-mRNA splicing, ribosome biogenesis, and transcriptional regulation. The 148-156 peptide segment represents a functionally relevant sequence that is often utilized in studies aimed at elucidating the structure-function relationships within the DDX5 protein, as well as in the development of peptide-based molecular probes. Its defined sequence and biochemical properties make it a valuable research reagent for dissecting protein-protein interactions, post-translational modifications, and the mechanistic underpinnings of RNA helicase activity.

Peptide mapping: In proteomics and structural biology, the DDX5 (148-156) peptide is frequently employed as a reference standard for peptide mapping experiments. Its well-characterized sequence enables precise identification and quantification of DDX5-derived fragments in mass spectrometry workflows. By serving as an internal calibrant or marker, it facilitates the validation of enzymatic digestion protocols and supports the accurate profiling of DDX5 expression or modification states in complex biological samples.

Antibody generation: The 148-156 region of DDX5 is often selected as an immunogenic epitope for the production of sequence-specific antibodies. Synthetic peptides corresponding to this segment can be conjugated to carrier proteins and used to immunize host animals, thereby generating polyclonal or monoclonal antibodies with high specificity for DDX5. These antibodies are instrumental in applications such as immunoprecipitation, western blotting, and immunofluorescence, enabling researchers to monitor DDX5 localization, abundance, and post-translational modifications in various experimental systems.

Protein interaction studies: The DDX5 (148-156) peptide serves as a valuable tool for investigating protein-protein interactions involving the DDX5 helicase. By using this fragment in pull-down assays or surface plasmon resonance experiments, researchers can identify and characterize binding partners that recognize this specific region. Such studies contribute to a deeper understanding of the molecular networks governing RNA metabolism, as well as the regulatory mechanisms that modulate helicase activity in response to cellular signals.

Phosphorylation analysis: The 148-156 sequence of DDX5 contains residues that are potential substrates for post-translational modifications, particularly phosphorylation. Synthetic versions of this peptide are widely used in kinase assays and phosphoproteomics workflows to examine the specificity and activity of relevant kinases. By monitoring the incorporation of phosphate groups in vitro, investigators can elucidate signaling pathways that regulate DDX5 function and gain insight into dynamic cellular responses to environmental cues.

Functional peptide assays: As a defined fragment of the DDX5 protein, the 148-156 peptide can be utilized in functional assays to probe the biological activity of the parent helicase or to assess the effects of sequence alterations. For example, site-directed mutagenesis of this region followed by biochemical analysis can reveal critical residues required for enzymatic activity, substrate recognition, or protein stability. Such studies provide mechanistic insights into the role of DDX5 in RNA processing and contribute to the rational design of modulators targeting DEAD-box helicases.

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