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USP1 deubiquitinates ubiquitinated PCNA. 4 / 4
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"They observed an increased mutation frequency in cells in which USP1 was inactivated, a result expected if steady-state levels of monoubiquitinated PCNA are upregulated because of reduced deubiquitina[MISSING/INVALID CREDENTIALS: limited to 200 char for Elsevier]"

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"In vitro, the USP1 and UAF1 complex can de-ubiquitinate mono-ubiquitinated PCNA more efficiently than USP1 alone [59]."

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"USP1 (ubiquitin specific peptidase 1), which promotes de-ubiquitination of mono-ubiquitinated PCNA [57], forms a stable complex with UAF1 (USP1 associated factor 1), which stabilizes and activates USP[MISSING/INVALID CREDENTIALS: limited to 200 char for Elsevier]"

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"Following DNA synthesis on damaged DNA templates by TLS polymerase (Mailand et al., 2013), the ubiquitinated PCNA is deubiquitinated by USP1, causing the release of TLS polymerases and re-association [MISSING/INVALID CREDENTIALS: limited to 200 char for Elsevier]"