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Stability across the Whole Nuclear Genome in the Presence and Absence of DNA Mismatch Repair.
Lujan, Scott Alexander; Kunkel, Thomas A.
Afiliación
  • Lujan SA; Genome Integrity Structural Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, DHHS, Research Triangle Park, NC 27709, USA.
  • Kunkel TA; Genome Integrity Structural Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, DHHS, Research Triangle Park, NC 27709, USA.
Cells ; 10(5)2021 05 17.
Article en En | MEDLINE | ID: mdl-34067668
ABSTRACT
We describe the contribution of DNA mismatch repair (MMR) to the stability of the eukaryotic nuclear genome as determined by whole-genome sequencing. To date, wild-type nuclear genome mutation rates are known for over 40 eukaryotic species, while measurements in mismatch repair-defective organisms are fewer in number and are concentrated on Saccharomyces cerevisiae and human tumors. Well-studied organisms include Drosophila melanogaster and Mus musculus, while less genetically tractable species include great apes and long-lived trees. A variety of techniques have been developed to gather mutation rates, either per generation or per cell division. Generational rates are described through whole-organism mutation accumulation experiments and through offspring-parent sequencing, or they have been identified by descent. Rates per somatic cell division have been estimated from cell line mutation accumulation experiments, from systemic variant allele frequencies, and from widely spaced samples with known cell divisions per unit of tissue growth. The latter methods are also used to estimate generational mutation rates for large organisms that lack dedicated germlines, such as trees and hyphal fungi. Mechanistic studies involving genetic manipulation of MMR genes prior to mutation rate determination are thus far confined to yeast, Arabidopsis thaliana, Caenorhabditis elegans, and one chicken cell line. A great deal of work in wild-type organisms has begun to establish a sound baseline, but far more work is needed to uncover the variety of MMR across eukaryotes. Nonetheless, the few MMR studies reported to date indicate that MMR contributes 100-fold or more to genome stability, and they have uncovered insights that would have been impossible to obtain using reporter gene assays.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Daño del ADN / Análisis Mutacional de ADN / Núcleo Celular / Inestabilidad Genómica / Reparación de la Incompatibilidad de ADN / Tasa de Mutación / Secuenciación Completa del Genoma Límite: Humans Idioma: En Revista: Cells Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Daño del ADN / Análisis Mutacional de ADN / Núcleo Celular / Inestabilidad Genómica / Reparación de la Incompatibilidad de ADN / Tasa de Mutación / Secuenciación Completa del Genoma Límite: Humans Idioma: En Revista: Cells Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos