Cited by 283DNA and Nucleic Acid ChemistryAdvanced biosensing and bioanalysis techniquesChemical Synthesis and Analysis

The Efficiency of Light-Directed Synthesis of DNA Arrays on Glass Substrates

McGall, Glenn H., Barone, Anthony D., Diggelmann, Martin, Fodor, Stephen P. A., Gentalen, Erik, Ngo, Nam·1997·Journal of the American Chemical Society

Abstract

New methods based on photolithography and surface fluorescence were used to determine photodeprotection rates and stepwise yields for light-directed oligonucleotide synthesis using photolabile 5‘-(((α-methyl-2-nitropiperonyl)oxy)carbonyl)(MeNPOC)-2‘-deoxynucleoside phosphoramidites on planar glass substrates. Under near-UV illumination (primarily 365 nm) from a mercury light source, the rate of photoremoval of the MeNPOC protecting group was found to be independent of both the nucleotide and length of the growing oligomer ( t 1/2 = 12 s at 27.5 mW/cm 2 ). A moderate dependence on solvent polarity was observed, with photolysis proceeding most rapidly in the presence of nonpolar solvents or in the absence of solvent (e.g., t 1/2 = 10−13 s at 27.5 mW/cm 2 ). In solution, the photolysis rate was linearly dependent on light intensity over the range 5−50 mW/cm 2 . Average stepwise yields for the synthesis of dodecamer oligonucleotides were in the range of 92−94%, using monomers based on N 6 -(phenoxyacetyl)-2‘-deoxyadenosine, N 2 -isobutyryl-2‘-deoxyguanosine, N 4 -isobutyryl-2‘-deoxycytidine, and thymidine. By comparison, an efficiency of 98%/step was obtained using a conventional 5‘-dimethoxytrityl monomer with acid deprotection on the same support. The lower yields associated with the photochemical process appears to be due to incomplete recovery of free 5‘-hydroxyl groups after photolysis on the support, although high yields of 5‘-OH nucleosides (≥96%) are consistently observed when 5‘-MeNPOC monomers are photolyzed in solution.

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Crossref · 10.1021/ja964427a

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  • An exponential attenuation model fit to the data gave an averaged stepwise yield of ~97.1%, acceptable compared with previously reported chemical synthesis yields (90 to 98%) and enzymatic synthesis (~97.7%).

    “An exponential attenuation model was used to fit the data points in Fig. 2E so that an averaged stepwise yield of ~97.1% was obtained from the equation, which was acceptable compared with previously reported yields for chemical synthesis (90 to 98%) (40, 41) and enzymatic synthesis (~97.7%) (42).”

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Authors
McGall, G. H., Barone, A. D., Diggelmann, M., Fodor, S. P. A., Gentalen, E., & Ngo, N.
Affiliations
Affymetrix (United States) (US)
Venue
Journal of the American Chemical Society
Published
1997-06-01
Volume
119
Issue
22
Pages
5081-5090
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2071451059
Cited by
282
References
16
Citations by year
2026: 1 · 2025: 4 · 2024: 5 · 2023: 6 · 2022: 1 · 2021: 3 · 2020: 2 · 2019: 7 · 2018: 4 · 2017: 4 · 2016: 9 · 2015: 6 · 2014: 3 · 2013: 6 · 2012: 11
FWCI
4.95
Type
journal article
Language
en
Open access
closed
Locations
Journal of the American Chemical Society (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Advanced biosensing and bioanalysis techniques
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chemical Synthesis and Analysis
Keywords
DNA microarrays, glass substrates, photolabile protecting groups, surface fluorescence, photolithography, nucleoside phosphoramidites, solvent polarity effects

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