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- W4245203893 abstract "A variety of techniques, including filter binding, footprinting, and gel retardation, can be used to assay the transcriptional activator GAL4 (Gal4p) through the initial steps of its purification from yeast cells. Following DNA affinity chromatography, Gal4p still bound DNA selectively when assayed by filter binding or footprinting. However, the affinity-purified protein was no longer capable of forming a stable complex with DNA, as assayed by gel retardation. Mixing the purified Gal4p with the flowthrough fraction from the DNA affinity column restored gel retardation complex formation. Gel retardation assays were used to monitor the purification of a heat-stable Gal4p-DNA complex stabilization activity from the affinity column flowthrough. The activity coeluted from the final purification step with polypeptides of 21 and 27 kDa. The yeast gene encoding the 21-kDa protein was cloned on the basis of its N-terminal amino acid sequence. The gene, named EGD1 (enhancer of GAL4 DNA binding), encodes a highly basic protein (21% lysine and arginine) with a predicted molecular mass of 16.5 kDa. The amino acid sequence of the EGD1 product, Egd1p, is highly similar to that of the human protein BTF3 (X. M. Zheng, D. Black, P. Chambon, and J. M. Egly, Nature [London] 344:556-559, 1990). Although an egd1 null mutant was viable and Gal+, induction of the galactose-regulated genes in the egd1 mutant strain was significantly reduced when cells were shifted from glucose to galactose." @default.
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- W4245203893 date "1992-12-01" @default.
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- W4245203893 title "The EGD1 product, a yeast homolog of human BTF3, may be involved in GAL4 DNA binding" @default.
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- W4245203893 doi "https://doi.org/10.1128/mcb.12.12.5683-5689.1992" @default.
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