Relevance to Autism

TP53BP1 was identified as an ASD candidate gene in Wilfert et al., 2021 based on the discovery of private likely gene-disruptive (LGD) variants in this highly constrained (pLI 0.99) gene that were exclusively transmitted to three ASD probands in three independent families and its interconnectedness with other ASD candidate genes in protein-protein interaction (PPI) networks in this report. A de novo nonsense variant and a de novo missense variant in this gene had previously been identified in ASD probands from the Autism Sequencing Consortium (De Rubeis et al., 2014; Satterstrom et al., 2020).

Molecular Function

This gene encodes a protein that functions in the DNA double-strand break repair pathway choice, promoting non-homologous end joining (NHEJ) pathways, and limiting homologous recombination. This protein plays multiple roles in the DNA damage response, including promoting checkpoint signaling following DNA damage, acting as a scaffold for recruitment of DNA damage response proteins to damaged chromatin, and promoting NHEJ pathways by limiting end resection following a double-strand break. These roles are also important during V(D)J recombination, class switch recombination and at unprotected telomeres.

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