Non-canonical CRL4A/4B(CDT2) interacts with RAD18 to modulate post replication repair and cell survival.

ABSTRACT: The Cullin-4(CDT2) E3 ubiquitin ligase plays an essential role in DNA replication origin licensing directing degradation of several licensing factors at the G1/S transition in order to prevent DNA re-replication. Recently a RAD18-independent role of Cullin-4(CDT2) in PCNA monoubiquitylation has been proposed. In an effort to better understand the function of Cullin-4(CDT2) E3 ubiquitin ligase in mammalian Post-Replication Repair during an unperturbed S-phase, we show that down-regulation of Cullin-4(CDT2) leads to two distinguishable independent phenotypes in human cells that unveil at least two independent roles of Cullin-4(CDT2) in S-phase. Apart from the re-replication preventing activity, we identified a non-canonical Cullin-4(CDT2) complex, containing both CUL4A and CUL4B, associated

SUBMITTER: Sertic S 

PROVIDER: S-EPMC3612035 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature