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- W2053996917 abstract "The purified dimeric form of the Rep protein, a replication initiator protein of the plasmid pSC101, has a low affinity for repeated sequences, iterons, in the replication origin of the plasmid, and higher affinities for two inverted repeats in the operator region of the rep gene resulting in its functioning as an autorepressor. Studies of binding to various synthetic DNA have established that Rep can bind to duplex iteron-sequence carrying open (non-complementary) strands at one end proximal to the rep gene. Open strands at the opposite end of the iteron have no effect on Rep-binding. One open strand seems to be required in a sequence-specific fashion. A randomly sequenced duplex DNA with the open strands cannot bind to Rep but can function as a significant competitor. This suggests that Rep has some affinity for the open strands and forms a stable complex with the adjacent iteron. The mutated Rep protein, Rep1, which causes an increase in the plasmid copy number in vivo, has equally high affinity for the iteron with the open strands as wild type Rep, though it has a lower affinity for the inverted repeats than the wild type. The Rep dimer might bind to these DNA sequences with different modes." @default.
- W2053996917 created "2016-06-24" @default.
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- W2053996917 date "1996-03-01" @default.
- W2053996917 modified "2023-09-27" @default.
- W2053996917 title "Open strands adjacent to iterons promote the binding of the replication initiator protein (Rep) of pSC101 to the unit sequence of the iterons in vitro" @default.
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- W2053996917 doi "https://doi.org/10.1016/0167-4781(95)00220-0" @default.
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