Zebrafish Polymerase Theta and human Polymerase Theta: Orthologues with homologous function.

ABSTRACT: DNA Polymerase Theta (Pol θ) is a conserved an A-family polymerase that plays an essential role in repairing double strand breaks, through micro-homology end joining, and bypassing DNA lesions, through translesion synthesis, to protect genome integrity. Despite its essential role in DNA repair, Pol θ is inherently error-prone. Recently, key loop regions were identified to play an important role in key functions of Pol θ. Here we present a comparative structure-function study of the polymerase domain of zebrafish and human Pol θ. We show that these two proteins share a large amount of sequence and structural homology. Using a classical biochemical approach we observe that zebrafish Pol θ displays behavior characteristic of human Pol θ, including DNA template extension in the presence of dif

SUBMITTER: Thomas C 

PROVIDER: S-EPMC12040184 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature