2'-deoxypseudoU-CE Phosphoramidite

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10-1055
5'-Dimethoxytrityl-2'-deoxypseudoUridine,3'-[(2-cyanoethyl)-(N,N-diisopropyl)]-phosphoramidite

Product Specifications

Formula:
C39H47N4O8P
M.W.:
730.8
F.W.:
290.17
CAS Number:
289712-98-7
Catalog Number: Select Pack Size and Format to Reveal

Description

The C-nucleoside 2'-deoxypseudouridine, in contrast to dU, forms stable C:pseudoU-A triplets. 2-Aminopurine lacks groups critical for hydrogen bonding and is a mildly fluorescent base. Demand for sulfur modified bases continues to expand for investigations of oligonucleotide structure, but primarily for cross-linking purposes. 6-Thio-dG, 4-Thio-dT and 4-thio-dU are very useful modifications for photo cross-linking and photoaffinity labelling experiments. Oligos containing 2-thio-dT are useful in examining protein-DNA interaction by acting as photosensitizing probes. The thiocarbonyl group in 2-thio-dT is especially interesting in that it is available to react with compounds associating with the minor groove of DNA. 2-Amino-A forms a very stable base pair with T containing three hydrogen bonds but the stability of the base pair with 2-thio-T is greatly diminished. Due to steric interactions between the 2-thio group of thymidine and the 2-amino group of 2-amino-A, the base pair contains only a single hydrogen bond. Oligos containing 2-amino-dA and 2-thio-dT exhibit high affinity for natural oligonucleotides but show little affinity for other similar oligos even of a complementary sequence.

Details

Usage

  • Coupling: No changes needed from standard method recommended by synthesizer manufacturer.
  • Deprotection: No changes needed from standard method recommended by synthesizer manufacturer.
Specifications
Diluent Anhydrous Acetonitrile
Storage Refrigerated storage, maximum of 2-8°C, dry
Stability 2-3 days


Dilution/Coupling Data

The table below show pack size data and, for solutions, dilution and approximate coupling based on normal priming procedures.

ABI 392/394

Catalog # Pack Size Grams/Pack 0.1M Dil. (mL) Approximate Number of Additions
LV40 LV200 40nm 0.2μm 1μm 10μm
10-1055-02 0.25 g .25grams 3.42 100.67 60.4 37.75 27.45 20.13 5.03
10-1055-90 100 µmol .073grams 1 20 12 7.5 5.45 4 1
10-1055-95 50 µmol .037grams 0.5 3.33 2 1.25 0.91 0.67 0.17

Expedite

Catalog # Pack Size Grams/Pack Dilution (mL) Approximate Number of Additions
Molarity 50nm 0.2μm 1μm 15μm
10-1055-02 0.25 g .25grams 5.11 0.07 95.8 59.88 43.55 5.99
10-1055-90 100 µmol .073grams 1.5 0.07 23.6 14.75 10.73 1.48
10-1055-95 50 µmol .037grams 0.75 0.07 8.6 5.38 3.91 0.54