1d26: Difference between revisions
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'''EFFECT OF A SINGLE 3'-METHYLENE PHOSPHONATE LINKAGE ON THE CONFORMATION OF AN A-DNA OCTAMER DOUBLE HELIX''' | '''EFFECT OF A SINGLE 3'-METHYLENE PHOSPHONATE LINKAGE ON THE CONFORMATION OF AN A-DNA OCTAMER DOUBLE HELIX''' | ||
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==About this Structure== | ==About this Structure== | ||
Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1D26 OCA]. | |||
==Reference== | ==Reference== | ||
Effect of a single 3'-methylene phosphonate linkage on the conformation of an A-DNA octamer double helix., Heinemann U, Rudolph LN, Alings C, Morr M, Heikens W, Frank R, Blocker H, Nucleic Acids Res. 1991 Feb 11;19(3):427-33. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/2011517 2011517] | Effect of a single 3'-methylene phosphonate linkage on the conformation of an A-DNA octamer double helix., Heinemann U, Rudolph LN, Alings C, Morr M, Heikens W, Frank R, Blocker H, Nucleic Acids Res. 1991 Feb 11;19(3):427-33. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/2011517 2011517] | ||
[[Category: Heinemann, U.]] | [[Category: Heinemann, U.]] | ||
[[Category: | [[Category: A-dna]] | ||
[[Category: | [[Category: Double helix]] | ||
[[Category: | [[Category: Modified]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 13:21:55 2008'' | |||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | |||
Revision as of 10:21, 2 May 2008
EFFECT OF A SINGLE 3'-METHYLENE PHOSPHONATE LINKAGE ON THE CONFORMATION OF AN A-DNA OCTAMER DOUBLE HELIX
Overview
The three-dimensional structure of the self-complementary DNA octamer d(GCCCGpGGC) has been determined in the crystalline state using X-ray diffraction data to a nominal resolutoin of 2.12 measured from a very small crystal at DESY, Hamburg. The structure was refined with stereochemical restraints to an R value of 17.1%. d(GCCCGpGGC), containing one single 3'-methylene phosphonate linkage (denoted p), forms an A-DNA double helix with strict dyad symmetry, that is distinct from canonical A-DNA by a wide open major groove and a small average base-pair inclination against the helix axis. The conformation of the unmodified control d(GCCCGGGC) is known from an X-ray analysis of isomorphous crystals (Heinemann et al. (1987) Nucleic Acids Res. 15, 9531-9550). Comparison of the two structures reveals only minor conformational differences, most notably in the pucker of the reduced deoxyribose. It is suggested that oligonucleotides with charged 3'-methylene phosphonate groups may form stable duplexes with complementary DNA or RNA strands rendering them candidates for use as gene-regulatory antisense probes.
About this Structure
Full crystallographic information is available from OCA.
Reference
Effect of a single 3'-methylene phosphonate linkage on the conformation of an A-DNA octamer double helix., Heinemann U, Rudolph LN, Alings C, Morr M, Heikens W, Frank R, Blocker H, Nucleic Acids Res. 1991 Feb 11;19(3):427-33. PMID:2011517 Page seeded by OCA on Fri May 2 13:21:55 2008
