Rna-protein Complex Formation
Rna-protein Complex Formation - Related Videos
06:36
Horizontal Gel Electrophoresis for Enhanced Detection of Protein-RNA Complexes
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Cited by 6 •
2017
Native polyacrylamide gel electrophoresis is a fundamental tool for analyzing RNA-protein interactions. Traditionally most experiments have used vertical gels. However, horizontal gels provide several advantages, such as the opportunity to monitor complexes during electrophoresis. We provide a detailed protocol for generating and using horizontal native gel electrophoresis.
03:45
Formation of Complex Ions
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2020
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
02:41
Protein Complex Assembly
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2020
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes. Many viruses self-assemble into a fully functional unit using the infected host cell to...
05:07
RNA-Protein Pull-Down Assay to Isolate RNA-Binding Proteins via Affinity Extraction
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2025
This video demonstrates an in vitro RNA pull-down assay to identify RNA-binding proteins (RBPs), which interact with the adenylate-uridylate-rich element (ARE) sequences in mRNA. The target RBPs from a cell lysate are mixed with an RNA probe to form RNA-protein complexes. The complexes are isolated via affinity purification utilizing the affinity of the desthiobiotin label of the RNA probe to a streptavidin-labeled magnetic bead.
02:36
RNA Polymerase II Accessory Proteins
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2020
Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
FAQs
Electrostatic attraction helps bring negatively charged RNA backbones into contact with proteins containing basic residues. This initial interaction can support closer molecular recognition, while hydrogen bonds and matching structural features help determine whether association is maintained. Considering both charge and recognition is important when interpreting why a protein binds one RNA molecule more effectively than another.
RNA-protein complex formation can depend on more than general charge attraction. Proteins may recognize particular RNA sequences or three-dimensional folds, allowing interactions to become selective rather than broadly nonspecific. These molecular features help explain how a protein identifies an appropriate RNA target and influences the resulting complex's biological role.
Protein association can affect several stages of RNA biology, including stability, processing, transport, translation, and localization. The outcome depends on the interaction and the cellular role of the participating molecules. Studying these consequences helps connect molecular binding events with broader patterns of gene regulation and cellular function.
Researchers examine RNA-protein complex formation with binding assays, purification, structural analysis, and interaction mapping. Binding assays address association, whereas purification helps isolate the complex for further study. Structural analysis and interaction mapping add information about molecular organization and contact patterns, creating complementary evidence about how the complex forms and functions.
Purification separates the RNA-protein complex from other cellular components so its properties can be examined more directly. Structural analysis then provides information about how the molecules are arranged and recognized within the assembly. Together, these approaches help connect an observed association with its molecular organization and possible functional significance.
This approach is useful when researchers need to understand gene regulation, RNA biology, disease mechanisms, or therapeutic design. Interaction mapping can identify relationships between RNAs and proteins, while binding and structural studies help explain their molecular basis. The resulting information can support analysis of how RNA behavior is controlled in cells.