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. 2023 Mar 2;6:234. doi: 10.1038/s42003-023-04596-6

Fig. 7. Model for TRF1/PARP1/RecQ helicases interplay during telomere replication.

Fig. 7

In the ES, PARP1 binds to and PARylates TRF1 decreasing its affinity for DNA duplex, that is functional for fork progression. In MS PARP1/TRF1 complexes are stabilized on single stranded DNA and recruit BLM and WRN that resolve secondary structures forming at the G-rich lagging strand. Created in BioRender.com.