Abstract
Many of the most widely employed operations in molecular biology hinge upon the use of single-stranded DNA as a probe or template. Here we report a straightforward method by which to produce long single-stranded DNA molecules using the polymerase chain reaction (PCR) in combination with immobilized metal affinity chromatography (IMAC). We demonstrate that a tag consisting of six successive 6-histaminylpurine (H) residues (H6-tag) endows a DNA strand with selective retentivity onto a Ni2+-NTA-agarose chromatography matrix. The H6-tagged strand can then be eluted from the resin using 200 mM imidazole. Quantitative phosphorimaging analysis revealed that the PCR/IMAC procedure typically yields unmodified strands comprising >90% of the unbound DNA and H6-tagged strands comprising >95% of the bound fractions. DNA strands generated in this manner are shown to be excellent substrates for template-directed polymerization. The chemistry reported herein should facilitate a wide variety of operations in molecular biology, including automated DNA sequencing, hybridization screening of DNA libraries, assembly of gene cassettes, run-off transcription, site-directed mutagenesis and footprinting of protein-DNA complexes by template-directed interference footprinting.
Full Text
The Full Text of this article is available as a PDF (125.4 KB).
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Allerson C. R., Verdine G. L. Synthesis and biochemical evaluation of RNA containing an intrahelical disulfide crosslink. Chem Biol. 1995 Oct;2(10):667–675. doi: 10.1016/1074-5521(95)90030-6. [DOI] [PubMed] [Google Scholar]
- Arnold F. H. Metal-affinity separations: a new dimension in protein processing. Biotechnology (N Y) 1991 Feb;9(2):151–156. doi: 10.1038/nbt0291-151. [DOI] [PubMed] [Google Scholar]
- Bowman B. H., Palumbi S. R. Rapid production of single-stranded sequencing template from amplified DNA using magnetic beads. Methods Enzymol. 1993;224:399–406. doi: 10.1016/0076-6879(93)24030-x. [DOI] [PubMed] [Google Scholar]
- Chen L., Oakley M. G., Glover J. N., Jain J., Dervan P. B., Hogan P. G., Rao A., Verdine G. L. Only one of the two DNA-bound orientations of AP-1 found in solution cooperates with NFATp. Curr Biol. 1995 Aug 1;5(8):882–889. doi: 10.1016/s0960-9822(95)00178-3. [DOI] [PubMed] [Google Scholar]
- Gyllensten U. B., Erlich H. A. Generation of single-stranded DNA by the polymerase chain reaction and its application to direct sequencing of the HLA-DQA locus. Proc Natl Acad Sci U S A. 1988 Oct;85(20):7652–7656. doi: 10.1073/pnas.85.20.7652. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hayashibara K. C., Verdine G. L. Template-directed interference footprinting of cytosine contacts in a protein-DNA complex: potent interference by 5-aza-2'-deoxycytidine. Biochemistry. 1992 Nov 24;31(46):11265–11273. doi: 10.1021/bi00161a002. [DOI] [PubMed] [Google Scholar]
- Mitchell L. G., Merril C. R. Affinity generation of single-stranded DNA for dideoxy sequencing following the polymerase chain reaction. Anal Biochem. 1989 May 1;178(2):239–242. doi: 10.1016/0003-2697(89)90631-3. [DOI] [PubMed] [Google Scholar]
- Porath J., Carlsson J., Olsson I., Belfrage G. Metal chelate affinity chromatography, a new approach to protein fractionation. Nature. 1975 Dec 18;258(5536):598–599. doi: 10.1038/258598a0. [DOI] [PubMed] [Google Scholar]
- Saiki R. K., Gelfand D. H., Stoffel S., Scharf S. J., Higuchi R., Horn G. T., Mullis K. B., Erlich H. A. Primer-directed enzymatic amplification of DNA with a thermostable DNA polymerase. Science. 1988 Jan 29;239(4839):487–491. doi: 10.1126/science.2448875. [DOI] [PubMed] [Google Scholar]
- Saiki R. K., Scharf S., Faloona F., Mullis K. B., Horn G. T., Erlich H. A., Arnheim N. Enzymatic amplification of beta-globin genomic sequences and restriction site analysis for diagnosis of sickle cell anemia. Science. 1985 Dec 20;230(4732):1350–1354. doi: 10.1126/science.2999980. [DOI] [PubMed] [Google Scholar]
- Smith M. C., Furman T. C., Ingolia T. D., Pidgeon C. Chelating peptide-immobilized metal ion affinity chromatography. A new concept in affinity chromatography for recombinant proteins. J Biol Chem. 1988 May 25;263(15):7211–7215. [PubMed] [Google Scholar]
- Sulkowski E. The saga of IMAC and MIT. Bioessays. 1989 May;10(5):170–175. doi: 10.1002/bies.950100508. [DOI] [PubMed] [Google Scholar]
