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[[Image:344d.gif|left|200px]]
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{{STRUCTURE_344d|  PDB=344d  |  SCENE=  }}  
{{STRUCTURE_344d|  PDB=344d  |  SCENE=  }}  


'''DETERMINATION BY MAD-DM OF THE STRUCTURE OF THE DNA DUPLEX D(ACGTACG(5-BRU))2 AT 1.46A AND 100K'''
===DETERMINATION BY MAD-DM OF THE STRUCTURE OF THE DNA DUPLEX D(ACGTACG(5-BRU))2 AT 1.46A AND 100K===




==Overview==
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A four-wavelength MAD experiment on a new brominated octanucleotide is reported here. d[ACGTACG(5-BrU)], C77H81BrN30O32P7, Mr (DNA) = 2235, tetragonal, P43212 (No. 96), a = 43.597, c = 26.268 A, V = 49927.5 A3, Z = 8, T = 100 K, R = 10.91% for 4312 reflections between 15.0 and 1.46 A resolution. The self-complementary brominated octanucleotide d[ACGTACG(5-BrU)]2 has been crystallized and data measured to 1.45 A at both 293 K and a second crystal flash frozen at 100 K. The latter data collection was carried out to the same resolution at the four wavelengths 0.9344, 0.9216, 0.9208 and 0.9003 A, around the Br K edge at 0.92 A and the structure determined from a map derived from a MAD data analysis using pseudo-MIR methodology, as implemented in the program MLPHARE. This is one of the first successful MAD phasing experiments carried out at Sincrotrone Elettra in Trieste, Italy. The structure was refined using the data measured at 0.9003 A, anisotropic temperature factors and the restrained least-squares refinement implemented in the program SHELX96, and the helical parameters are compared with those previously determined for the isomorphous d(ACGTACGT)2 analogue. The asymmetric unit consists of a single strand of octamer with 96 water molecules. No countercations were located. The A-DNA helix geometry obtained has been analysed using the CURVES program.
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{{ABSTRACT_PUBMED_10089302}}


==About this Structure==
==About this Structure==
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[[Category: Double helix]]
[[Category: Double helix]]
[[Category: Modified]]
[[Category: Modified]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May  4 20:16:38 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 16:03:58 2008''

Revision as of 13:04, 27 July 2008

File:344d.png

Template:STRUCTURE 344d

DETERMINATION BY MAD-DM OF THE STRUCTURE OF THE DNA DUPLEX D(ACGTACG(5-BRU))2 AT 1.46A AND 100K

Template:ABSTRACT PUBMED 10089302

About this Structure

Full crystallographic information is available from OCA.

Reference

Determination by MAD-DM of the structure of the DNA duplex d[ACGTACG(5-BrU)]2 at 1.46 A and 100 K., Todd AK, Adams A, Powell HR, Wilcock DJ, Thorpe JH, Lausi A, Zanini F, Wakelin LP, Cardin CJ, Acta Crystallogr D Biol Crystallogr. 1999 Apr;55(Pt 4):729-35. PMID:10089302

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