Video Experimental Relacionado
Updated: Feb 24, 2026

10:57
Mapping Absolute DNA Density in Cell Nuclei using Single-molecule Localization Microscopy
Published on: November 11, 2025
870
NSD3 estabiliza la compartimentación nuclear y promueve interacciones de cromatina a escala de megabases
bioRxiv : the preprint server for biology
|February 23, 2026
Resumen
La proteína NSD3 media el plegamiento de cromatina y la organización nuclear tanto en células sanas como cancerosas. Estabiliza oncoproteínas, promueve la expresión génica y mantiene estructuras de condensado, impactando la regulación génica.
Área de la Ciencia:
- Biología Molecular
- Biología Celular
- Genómica
Sus antecedentes:
- La organización nuclear y el plegamiento de la cromatina son cruciales para la regulación génica en la salud y la enfermedad.
- Las oncoproteínas de fusión alteran el plegamiento de la cromatina, formando condensados biomoleculares, pero sus cofactores y funciones en células normales no están claros.
Objetivo del estudio:
- Identificar cofactores involucrados en la regulación de la cromatina impulsada por oncoproteínas.
- Determinar si estos cofactores tienen funciones análogas en células sin oncoproteínas de fusión.
Principales métodos:
- Análisis de la estructura de la cromatina en células positivas y negativas para fusiones.
- Investigación del papel de NSD3 en la estabilización de oncoproteínas de fusión y la promoción de modificaciones de histonas.
- Evaluación del impacto de la pérdida de NSD3 en las interacciones de la cromatina y los condensados nucleares.
Principales resultados:
- NSD3 media el plegamiento de cromatina tanto en células positivas como negativas para fusiones.
- NSD3 estabiliza la oncoproteína BRD4-NUT, promueve H3K36me2 y apoya la expresión de oncogenes.
- La pérdida de NSD3 reduce las interacciones de cromatina a larga distancia.
- NSD3short promueve contactos a través de su dominio PWWP.
Conclusiones:
- NSD3 es un mediador clave del plegamiento de la cromatina y la organización nuclear, funcionando tanto en contextos normales como oncogénicos.
- NSD3 actúa como una proteína adaptadora, promoviendo contactos de cromatina independientemente de su actividad enzimática.
- La comprensión del papel de NSD3 arroja luz sobre la compartimentación nuclear y la regulación génica en el cáncer.
Videos de Conceptos Relacionados
Chromatin Packaging
22.5K
Each human somatic cell contains 6 billion base-pairs of DNA. Each base-pair is 0.34 nm long, which means that each diploid cell contains a staggering 2 meters of DNA. How is such a long DNA strand packed inside a nucleus measuring only 10 - 20 microns in diameter?
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order...
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order...
22.5K
Chromatin Packaging
19.9K
Each human somatic cell contains 6 billion base pairs of DNA. Each base pair is 0.34 nm long, meaning each diploid cell contains a staggering 2 meters of DNA. This long DNA strand is packed inside a nucleus measuring only 10-20 microns in diameter with the help of specialized DNA-binding proteins called histones. Together they form a compact DNA-protein complex called chromatin. The chromatin is further compacted into higher-order structures. The highest level of compaction is achieved during...
19.9K
Nucleosome Remodeling
11.4K
Nucleosomes are the basic units of chromatin compaction. Each nucleosome consists of the DNA bound tightly around a histone core, which makes the DNA inaccessible to DNA binding proteins such as DNA polymerase and RNA polymerase. Hence, the fundamental problem is to ensure access to DNA when appropriate, despite the compact and protective chromatin structure.
Nucleosome remodeling complex
Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...
Nucleosome remodeling complex
Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...
11.4K
Condensins
4.8K
Condensins are large protein complexes that use ATP to fuel the assembly of chromosomes during mitosis. They transform the tangled, shapeless mass of post-interphase DNA into individualized chromosomes by compacting, organizing, and segregating chromosomal DNA.
The plant and animal cells contain two types of condensin complexes—condensin I and condensin II. Both complexes have five subunits: two SMC (Structural Maintenance of Chromosomes) subunits, a kleisin subunit, and two HEAT-repeat...
The plant and animal cells contain two types of condensin complexes—condensin I and condensin II. Both complexes have five subunits: two SMC (Structural Maintenance of Chromosomes) subunits, a kleisin subunit, and two HEAT-repeat...
4.8K
Nuclear Protein Sorting
6.5K
Nuclear protein sorting is the selective trafficking of histones, polymerases, gene regulatory proteins into the nucleus and exporting RNAs and ribosomes to the cytosol. It is a tightly controlled process that regulates gene expression within a cell.
Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
6.5K
Additional Subnuclear Structures
5.5K
The eukaryotic nucleus is a double membrane-bound organelle that contains nearly all of the cell’s genetic material in the form of chromosomes. It is rightly called the “brain” of the cell as it shoulders the responsibility of responding to various physiological processes, stress, altered metabolic conditions, and other cellular signals.
The nucleus contains many membrane-less subnuclear organelles or nuclear bodies, such as nucleoli, Cajal bodies, speckles,...
The nucleus contains many membrane-less subnuclear organelles or nuclear bodies, such as nucleoli, Cajal bodies, speckles,...
5.5K

