This is consistent with previous observations showing that DS-deletion in P3-ΔDS-47 (a P3HR1 strain) results in loss of ORC binding and origin activity at oriP and increased origin activation at additional distant sites [15], [30].
Second, replication origin activity, including origin assembly and origin activation timing, can be positively regulated by histone acetylation in a variety of systems (8, 9).
Finally, origin-specific trans-acting regulators of origin activity could be cell-type specific, allowing an additional level of regulation of origin activation.
To test whether replication origin activity is responsible for the location of termination events, we inactivated three active origins: ARS606, ARS731.5, and ARS1021.
It will be interesting to determine whether this function of Tel1 in controlling origin activity might be related to the role of ATR in promoting the activation of dormant origins at sites of replication stress in higher eukaryotes.
Guan, Z. et al. Decreased replication origin activity in temporal transition regions.
Table 1 Tested compounds with their names, Cas numbers, origin, activity, AC50 values obtained from Tox21 qHTS data set and orthogonal (Transient transactivation assay) efficacy values, with their corresponding concentration ranges.
In this paper, we chose Ni and MoS2, which are both commonly used in electrocatalytic water splitting, to prepare the hybrid and then used it as a template to study the origin activity.
Our results provide the first direct evidence to demonstrate that heterologous rMAR and rARS display chromosomal origin activity, suggesting that the chromosome structure and replication origin of rDNA reserve some common features during evolution.
The propensity to unwind is probably important for origin activity in vivo, because replication activity is maintained when the native downstream region is replaced with a heterologous DNA unwinding element from pBR322 in either orientation.
The molecular mechanisms through which Rb might directly influence origin activity are unclear.
