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A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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Detecting Somatic Genetic Alterations in Tumor Specimens by Exon Capture and Massively Parallel Sequencing
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Mapeo de la variación del número de copias por secuenciación del genoma a escala de población.

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  • 1Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.

Nature
|February 5, 2011
PubMed
Resumen
Este resumen es generado por máquina.

Este estudio mapea las variantes estructurales genómicas humanas (SV) en resolución de nucleótidos, revelando información sobre sus orígenes e impactos funcionales. El mapa completo de SV ayuda a futuros estudios de asociación genética.

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Área de la Ciencia:

  • La genómica es la genómica.
  • Genética Humana Genética Humana.
  • La bioinformática es la bioinformática.

Sus antecedentes:

  • Las variantes estructurales genómicas (SV) son comunes en los seres humanos, pero su arquitectura precisa es a menudo desconocida.
  • Comprender los SV es crucial para interpretar su impacto funcional y su papel en la variación humana.

Objetivo del estudio:

  • Construir un mapa de alta resolución de SV desequilibrados en el genoma humano.
  • Para analizar el origen, el impacto funcional y los mecanismos de formación de SVs.
  • Proporcionar un recurso para estudios de asociación basados en secuenciación.

Principales métodos:

  • Secuenciación de ADN del genoma completo de 185 genomas humanos.
  • Integración de enfoques complementarios de descubrimiento de SV.
  • Validación experimental extensa de los SV identificados.

Principales resultados:

  • Un mapa de 22.025 eliminaciones y 6.000 otros SV (inserciones, duplicaciones).
  • El 53% de los SV fueron mapeados a resolución de nucleótidos, lo que permitió un análisis detallado.
  • El agotamiento de las alteraciones genéticas en las deleciones de alta frecuencia y espectros de tamaño distintos para SVs de diferentes mecanismos.

Conclusiones:

  • El marco analítico desarrollado y el mapa SV son valiosos recursos para la investigación genética.
  • El mapeo SV de alta resolución mejora la comprensión de la variación genómica humana.
  • El estudio proporciona información sobre los puntos calientes de SV y los mecanismos de formación.