Gate Strands
Gate Strands - Related Videos
07:50
Plasmid-derived DNA Strand Displacement Gates for Implementing Chemical Reaction Networks
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Cited by 6 •
2015
This protocol describes a method for deriving DNA strand displacement gates from plasmids and testing them using fluorescence kinetics measurements. Gates can be modularly composed into multi-component systems to approximate the behavior of formal chemical reaction networks (CRN), demonstrating a new use for CRNs as a molecular programming language.
12:55
P50 Sensory Gating in Infants
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Cited by 5 •
2013
Methods to record auditory P50 sensory gating, a physiological marker of cerebral inhibition which reflects early stages of attention, are described.
02:04
Fixing Double-strand Breaks
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2020
The double-stranded structure of DNA has two major advantages. First, it serves as a safe repository of genetic information where one strand serves as the back-up in case the other strand is damaged. Second, the double-helical structure can be wrapped around proteins called histones to form nucleosomes, which can then be tightly wound to form chromosomes. This way, DNA chains up to 2 inches long can be contained within microscopic structures in a cell. A double-stranded break not only damages...
13:46
Separation of Single-stranded DNA, Double-stranded DNA and RNA from an Environmental Viral Community Using Hydroxyapatite Chromatography
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Cited by 5 •
2011
We describe an efficient method to separate single-stranded DNA, double-stranded DNA and RNA molecules from environmental viral communities. Nucleic acids are fractionated using hydroxyapatite chromatography with increasing concentrations of phosphate-containing buffers. This method permits the isolation of all viral nucleic acid types from environmental samples.
01:30
Ligand-Gated Ion Channel Receptor: Gating Mechanism
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2023
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
FAQs
A gate strand complex changes state when an incoming nucleic acid first binds an exposed toehold through complementary bases. That initial interaction creates a starting point for branch migration, in which the incoming strand progressively displaces the pre-existing strand. Because the sequence determines recognition and displacement, the process converts molecular binding into a controlled structural or signal-producing event.
Gate strands rely on sequence-specific hybridization, so a strand with the appropriate complementary sequence can engage the designed recognition region. This enables a molecular circuit to distinguish an intended input from unrelated nucleic acids and connect recognition to a defined downstream state. In biosensing, that selectivity helps translate target presence into a predictable output.
The outcome depends on whether target-triggered displacement changes the arrangement of strands in a way coupled to an output, such as a structural change or fluorescence change. A successful design therefore connects the recognition event, displacement pathway, and readout rather than treating binding alone as the final result. This coupling makes molecular information observable.
Gate strands can be arranged as components of molecular circuits that process inputs through logic operations or amplify signals. In this role, one strand-displacement event changes a molecular state that can participate in subsequent information-processing steps. The same programmable hybridization framework therefore supports conditional responses, rather than merely reporting that a complementary sequence was present.
A typical design starts by selecting the nucleic-acid input to be recognized, encoding complementary sequence regions into a gate complex, and leaving an appropriate toehold available for initiation. The experiment then introduces the input under the intended conditions and examines whether displacement produces the expected structural or fluorescent output. This workflow connects sequence design with measurable circuit behavior.
Researchers can look for either a structural change in the nucleic-acid complex or a fluorescent change coupled to that transition. Structural readouts indicate that the arrangement of strands has been altered, whereas fluorescence provides an observable signal for circuit state. Selecting a readout that matches the intended gate behavior helps connect molecular events with experimental interpretation.
Gate strands can couple recognition of a nucleic-acid target to a predictable structural or fluorescent response. That coupling provides a molecular route from target detection to an interpretable signal, while conditional strand displacement allows the response to be governed by sequence compatibility. In bioengineering, these properties support biosensing and diagnostics designed to operate under biologically relevant conditions.