Get A Laboratory Guide to In Vitro Studies of Protein-DNA PDF

By J. P. J., H. P. S. (auth.), Dr. Jean-Pierre Jost, Dr. Hans-Peter Saluz (eds.)

ISBN-10: 3034875614

ISBN-13: 9783034875615

ISBN-10: 3764326271

ISBN-13: 9783764326272

A safeguard issues Many suggestions defined right here contain a few risks, comparable to excessive electric present and voltage, radioactivity and hugely poisonous chemical compounds. it really is totally crucial that the directions of kit brands be undefined, and that specific awareness be paid to the neighborhood and federal safeguard laws. B advent The expression of prokaryotic and eukaryotic genes has been proven traditionally to be regulated on the point of mRNA synthesis. because of the quick improvement of equipment for dissecting DNA sequences, cis-acting regulatory parts corresponding to promoters and enhancers were recognized. extra lately, the generally expressed instinct that discrete sequences inside of those parts represent binding websites for sequence-specific binding proteins has been proven, specifically by utilizing "footprinting" assays (for examples, Galas and Schmitz, 1978). This and related assays have already ended in the popularity, isolation and research of DNA-bind­ ing proteins for a number of genes. very good experiences exist of the structural stories on those transcription regulatory proteins and comparable DNA components (for instance, Glover, 1989 and Johnson and McKnight, 1989), to which the reader is referred for distinct details. To set the scene for purposes of the concepts defined during this quantity, merely the barest define of prior experiences is gifted right here. Protein-DNA interactions are depending on very particular tertiary configurations of the binding protein which enable the nearest touch with the DNA helix.

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Extra resources for A Laboratory Guide to In Vitro Studies of Protein-DNA Interactions

Example text

Separate the labelled double-stranded oligonucleotide from the non-incorporated nucleotides by centrifugation through a spun column of Sephadex G-50 (see Appendix). > After centrifugation at 4000 rpm for 15 min, determine the specific radioactivity of the probe. Repeated ethanol precipitations can be used instead of spun column chromatography. Note: Alternatively, if a restriction DNA fragment or an oligonucleotide duplex have a 3' recessed end, it is possible to label with the fill-in reaction of polymerase I (Klenow large fragment).

Mol Cell. BioI. 6 (1986) 2098-2105. 34 Protein-DNA Interactions by Means of Enzymes III Exonuclease III Protection Assay for Specific DNA-Binding Proteins lean-Pierre lost Contents A Introduction . . . . . . . . . . . 1 Labelling and purification of the oligonucleotide 2 The protein-DNA binding reaction 36 36 38 B Materials and methods . . . . I Buffers and enzyme . . . . 2 Step-by-step procedure for assembling the binding reaction 3 The exonuclease III reaction . . . . . .

1989) and subtle structural alterations along the DNA helix can readily be footprinted (Becker and Wang, I 989a/b ). As summarised in Table 1 and discussed previously (Becker and Wang, 1989b), there is an excellent correlation between the ability of an agent to alter the UV photoreactivity and the torsional flexibility of DNA. This correlation reflects two important properties of UV photoreactions. First, the majority of UV photoproducts result from photodimerisation reactions between adjacent bases.

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A Laboratory Guide to In Vitro Studies of Protein-DNA Interactions by J. P. J., H. P. S. (auth.), Dr. Jean-Pierre Jost, Dr. Hans-Peter Saluz (eds.)

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