Video Experimental Relacionado
Updated: May 8, 2026

08:53
Identifying the Effects of BRCA1 Mutations on Homologous Recombination using Cells that Express Endogenous Wild-type BRCA1
Published on: February 18, 2011
Otras pruebas de la comunicación de BRCA1 con el cromosoma X inactivo
Daniel P Silver1, Stoil D Dimitrov, Jean Feunteun
1Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA.
Cell
|March 14, 2007
Resumen
El gen BRCA1, un supresor del cáncer de mama y de ovario, juega un papel en la regulación del cromosoma X inactivo (Xi). Una nueva investigación apoya el BRCA1
Área de la Ciencia:
- * Biología molecular.
- * Genética del cáncer.
- * Epigenética y regulación génica.
Sus antecedentes:
- * BRCA1 es un gen supresor de tumores conocido involucrado en la reparación del ADN y el control del punto de control del ciclo celular.
- * Estudios previos sugirieron una posible interacción entre BRCA1 y el cromosoma X inactivo (Xi) en células femeninas.
- * Investigaciones recientes han puesto en duda esta interacción, lo que requiere una mayor investigación.
Videos de Conceptos Relacionados
Epigenetic Regulation
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-Inactivation
The human X chromosome contains over ten times the number of genes as in the Y chromosome. Since males have only one X chromosome, and females have two, one might expect females to produce twice as many of the proteins, with undesirable results.
Inheritance of Chromatin Structures
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying DNA...
X and Y Chromosomes
Among mammals, the gender of an organism is determined by the sex chromosomes. Humans have two sex chromosomes, X and Y. Every human diploid cell has 22 pairs of autosomes and one pair of sex chromosomes. A human female has two X chromosomes, while a male has one X chromosome and one Y chromosome.
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...
X-inactivation
The human X chromosome contains over ten times the number of genes as in the Y chromosome. Since males have only one X chromosome, and females have two, one might expect females to produce twice as many of the proteins, with undesirable results.
Epigenetic Regulation
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...

