Video Experimental Relacionado
Updated: Jan 22, 2026

09:40
Analysis of the c-KIT Ligand Promoter Using Chromatin Immunoprecipitation
Published on: June 27, 2017
8.3K
Interacción de las tres unidades G-Quadruplex en el promotor KIT
Cosimo Ducani1, Giulio Bernardinelli1, Björn Högberg1
1Department of Medical Biochemistry and Biophysics , Karolinska Institutet , Stockholm 171 65 , Sweden.
Journal of the American Chemical Society
|June 28, 2019
Resumen
El promotor del KIT
Área de la Ciencia:
- Biología molecular
- La bioquímica
- En el campo de la oncología
Sus antecedentes:
- El KIT proto-oncogénico es un objetivo validado para los tumores del estroma gastrointestinal.
- El promotor de KIT contiene tres unidades formadoras de G-cuadruplex (G4) ricas en G: K2, SP y K1.
- Los estudios anteriores analizaron las unidades G4 individualmente, sin tener en cuenta su interacción dentro del promotor de KIT.
Objetivo del estudio:
- Investigar la interacción estructural y funcional de las tres unidades G4 adyacentes (K2, SP, K1) dentro de la secuencia del núcleo promotor del KIT.
- Comprender cómo estas estructuras vecinas de G4 se influyen entre sí y la función promotora en general.
- Explorar nuevas estrategias terapéuticas dirigidas al promotor de KIT G4s para el tratamiento del cáncer.
Principales métodos:
- Estudios estructurales y funcionales de la secuencia del núcleo del promotor KIT (de un solo y de dos hilos).
- Inhibición de la formación de unidades G4 individuales o múltiples.
- Combinación de técnicas biofísicas y ensayos biológicos.
Principales resultados:
- Las tres unidades G4 (K2, SP, K1) en el promotor de KIT son interdependientes y no se pueden analizar de forma aislada.
- Las secuencias ricas en K2 y K1 forman motivos G4 paralelos dentro de la secuencia promotora larga.
- El dominio rico en SP G contribuye a la formación de la estructura G4 sólo en conjunción con K2.
- La estructura de K1 G4 tiene un impacto significativo en la estabilidad general del promotor y la actividad biológica.
Conclusiones:
- La interacción entre las unidades G4 adyacentes en el promotor de KIT es crucial para su integridad estructural y función.
- El K1 G4 juega un papel dominante en la regulación de la estabilidad del promotor KIT y la actividad biológica.
- Dirigirse a la compleja red G4 dentro del promotor de KIT ofrece una alternativa prometedora para el desarrollo de fármacos contra el cáncer.
Videos de Conceptos Relacionados
The Eukaryotic Promoter Region
18.7K
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...
18.7K
Measurement: Standard Units
78.5K
Every measurement provides three kinds of information: the size or magnitude of the measurement (a number), a standard of comparison for the measurement (a unit), and an indication of the uncertainty of the measurement. While the number and unit are explicitly represented when a quantity is written, the uncertainty is an aspect of the errors in the measurement results.
78.5K
Measurement: Derived Units
54.4K
The International System of Units or SI system, by international agreement, has fixed measurement units for seven fundamental properties: length, mass, time, temperature, electric current, amount of substance, and luminosity. These are called the SI base units.
54.4K
Motor Units
61.8K
A motor unit consists of two main components: a single efferent motor neuron (i.e., a neuron that carries impulses away from the central nervous system) and all of the muscle fibers it innervates. The motor neuron may innervate multiple muscle fibers, which are single cells, but only one motor neuron innervates a single muscle fiber.
61.8K
Motor Units
7.6K
The motor unit is a fundamental component of the neuromuscular system and plays a crucial role in coordinating muscle contractions. It consists of a somatic motor neuron, which connects and controls multiple skeletal muscle fibers, forming a single functional segment. The axon of the motor neuron branches out and establishes synaptic connections known as neuromuscular junctions with individual muscle fibers within the motor unit.
Motor units come in different sizes, with smaller units...
Motor units come in different sizes, with smaller units...
7.6K
Units of Measurement
4.7K
Mechanical engineering is one of the oldest branches of engineering. It deals with designing, analyzing, and manufacturing machines and mechanical systems. To ensure precise and accurate calculations, units of measurement are used. They provide a standard system for expressing and comparing physical quantities.
There are various well-known historical measurement systems, such as the Babylonian system, the Roman system, the Egyptian system, the Olympian system, the British system, and the Indus...
There are various well-known historical measurement systems, such as the Babylonian system, the Roman system, the Egyptian system, the Olympian system, the British system, and the Indus...
4.7K

