Protein-dna Binding Detection
Protein-dna Binding Detection - Related Videos
08:51
Visualization of Surface-tethered Large DNA Molecules with a Fluorescent Protein DNA Binding Peptide
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Cited by 7 •
2016
We present an approach for visualizing fluorescent protein DNA binding peptide (FP-DBP)-stained large DNA molecules tethered on the polyethylene glycol (PEG) and avidin-coated glass surface and stretched with microfluidic shear flows.
07:05
Chromatin Immunoprecipitation to Identify Target Protein Binding Sites on Genomic DNA
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2025
In this video, we demonstrate the chromatin immunoprecipitation technique to identify protein binding sites on specific regions of the genomic DNA of oligodendrocyte precursor cells via the selective immunoprecipitation of protein-bound chromatin fragments. This method helps to study the interaction of several regulatory proteins, including transcription factors involved in gene regulation.
01:03
Single-Strand DNA Binding Proteins
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2023
For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...
10:34
Detection of RNA-binding Proteins by In Vitro RNA Pull-down in Adipocyte Culture
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Cited by 19 •
2016
An RNA pull-down protocol is optimized here for detection of interactions between RNA-binding proteins (RBPs) and noncoding as well as coding RNAs. An RNA fragment from androgen receptor (AR) was used as an example to demonstrate how to retrieve its RBP from lystate of primary brown adipocytes.
03:06
From DNA to Protein
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2020
The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
FAQs
Each assay converts binding into a measurable difference between complexed and unbound DNA. Depending on the approach, that difference appears as slower movement during electrophoresis, selective recovery through affinity-based isolation, protection of a bound DNA segment, or another signal change. These distinct readouts let investigators examine location and apparent strength under defined assay conditions.
Apparent strength is meaningful only in relation to the detection format and experimental setting. A measurement from a purified system may describe binding under controlled conditions, whereas a cellular assay evaluates interactions within chromatin. Comparing results therefore requires attention to whether the evidence came from isolated components or from cells and which readout was used.
These approaches provide complementary evidence rather than interchangeable measurements. Electrophoretic mobility shift assays distinguish protein-DNA complexes through mobility changes, chromatin immunoprecipitation uses affinity-based isolation to examine interactions in cells, and DNA footprinting identifies protected binding sites. Together, they connect complex formation, cellular context, and local sequence protection from different experimental perspectives.
An electrophoretic mobility shift assay focuses on whether protein-DNA complex formation changes the movement of DNA during electrophoresis. The resulting mobility difference separates complexed material from unbound DNA, providing evidence that an interaction occurred. This format is especially useful when investigators want to examine binding in a purified system rather than infer it directly from cellular chromatin.
Chromatin immunoprecipitation is useful when the research question concerns protein-DNA interactions in cells rather than only with purified components. Its affinity-based isolation readout can connect a protein with associated chromatin, helping investigators identify genomic targets and examine regulatory interactions in their cellular context. This makes it relevant to studies of transcription-factor targeting and gene regulation.
DNA footprinting uses protection of a DNA segment as evidence that a protein occupies a binding site. The protected pattern can help locate the relevant sequence within a regulatory element, adding positional information that a general complex-formation signal may not provide. Researchers can therefore use it to characterize how specific DNA regions participate in gene-expression control.