402d

</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=402d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=402d OCA], [https://pdbe.org/402d PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=402d RCSB], [https://www.ebi.ac.uk/pdbsum/402d PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=402d ProSAT]</span></td></tr>

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== Publication Abstract from PubMed ==

The crystal structure of the RNA octamer 5'-CGC(CA)GCG-3' has been determined from X-ray diffraction data to 2.3 A resolution. In the crystal, this oligomer forms a self-complementary double helix in the asymmetric unit. Tandem non-Watson-Crick C-A and A-C base pairs comprise an internal loop in the middle of the duplex, which is incorporated with little distortion of the A-form double helix. From the geometry of the C-A base pairs, it is inferred that the adenosine imino group is protonated and donates a hydrogen bond to the carbonyl group of the cytosine. The wobble geometry of the C-A+ base pairs is very similar to that of the common U-G non-Watson-Crick pair.

Structure of an RNA internal loop consisting of tandem C-A+ base pairs.,Jang SB, Hung LW, Chi YI, Holbrook EL, Carter RJ, Holbrook SR Biochemistry. 1998 Aug 25;37(34):11726-31. PMID:9718295<ref>PMID:9718295</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 402d" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Carter, R]]

[[Category: Chi, Y I]]

[[Category: Holbrook, E L]]

[[Category: Holbrook, S R]]

[[Category: Hung, L W]]

[[Category: Jang, S B]]

[[Category: Rna with tandem c-a+ base pair]]