View source for 1byx


==CHIMERIC HYBRID DUPLEX R(GCAGUGGC).R(GCCA)D(CTGC) COMPRISING THE TRNA-DNA JUNCTION FORMED DURING INITIATION OF HIV-1 REVERSE TRANSCRIPTION==
<StructureSection load='1byx' size='340' side='right'caption='[[1byx]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1byx]] is a 2 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BYX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1BYX FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1byx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1byx OCA], [https://pdbe.org/1byx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1byx RCSB], [https://www.ebi.ac.uk/pdbsum/1byx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1byx ProSAT]</span></td></tr>
</table>
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== Publication Abstract from PubMed ==
A high-quality NMR solution structure of the chimeric hybrid duplex r(gcaguggc).r(gcca)d(CTGC) was determined using the program DYANA with its recently implemented new module FOUND, which performs exhaustive conformational grid searches for dinucleotides. To ensure conservative data interpretation, the use of 1H-1H lower distance limit constraints was avoided. The duplex comprises the tRNA-DNA junction formed during the initiation of HIV-1 reverse transcription. It forms an A-type double helix that exhibits distinct structural deviations from a standard A-conformation. In particular, the minor groove is remarkably narrow, and its width decreases from about 7.5 A in the RNA/RNA stem to about 4.5 A in the RNA/DNA segment. This is unexpected, since minor groove widths for A-RNA and RNA/DNA hybrid duplexes of approximately 11 A and approximately 8.5 A, respectively, were previously reported. The present, new structure supports that reverse transcriptase-associated RNaseH specificity is related primarily to conformational adaptability of the nucleic acid in 'induced-fit'-type interactions, rather than the minor groove width of a predominantly static nucleic acid duplex.

NMR structure of the chimeric hybrid duplex r(gcaguggc).r(gcca)d(CTGC) comprising the tRNA-DNA junction formed during initiation of HIV-1 reverse transcription.,Szyperski T, Gotte M, Billeter M, Perola E, Cellai L, Heumann H, Wuthrich K J Biomol NMR. 1999 Apr;13(4):343-55. PMID:10353196<ref>PMID:10353196</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1byx" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Billeter M]]
[[Category: Cellai L]]
[[Category: Goette M]]
[[Category: Perola E]]
[[Category: Szyperski T]]