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A novel role of DNA polymerase λ in translesion synthesis in conjunction with DNA polymerase ζ

By extending synthesis opposite from a diverse array of DNA lesions, DNA polymerase (Pol) ζ performs a crucial role in translesion synthesis (TLS). In yeast and cancer cells, Rev1 functions as an indispensable scaffolding component of Polζ and it imposes highly error-prone TLS upon Polζ. However, fo...

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Detalles Bibliográficos
Autores principales: Yoon, Jung-Hoon, Basu, Debashree, Sellamuthu, Karthi, Johnson, Robert E, Prakash, Satya, Prakash, Louise
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Life Science Alliance LLC 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7898466/
https://www.ncbi.nlm.nih.gov/pubmed/33514655
http://dx.doi.org/10.26508/lsa.202000900
Descripción
Sumario:By extending synthesis opposite from a diverse array of DNA lesions, DNA polymerase (Pol) ζ performs a crucial role in translesion synthesis (TLS). In yeast and cancer cells, Rev1 functions as an indispensable scaffolding component of Polζ and it imposes highly error-prone TLS upon Polζ. However, for TLS that occurs during replication in normal human cells, Rev1 functions instead as a scaffolding component of Pols η, ι, and κ and Rev1-dependent TLS by these Pols operates in a predominantly error-free manner. The lack of Rev1 requirement for Polζ function in TLS in normal cells suggested that some other protein substitutes for this Rev1 role. Here, we identify a novel role of Polλ as an indispensable scaffolding component of Polζ. TLS studies opposite a number of DNA lesions support the conclusion that as an integral component, Polλ adapts Polζ-dependent TLS to operate in a predominantly error-free manner in human cells, essential for genome integrity and cellular homeostasis.