398d | pdb_0000398d

3'-DNA-RNA-5' JUNCTION FORMED DURING INITIATION OF MINUS-STRAND SYNTHESIS OF HIV REPLICATION

spinqualitylabelsall models 398d, resolution 1.94Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 398d is a 4 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed During initiation of minus-strand synthesis by HIV-1 reverse transcriptase, a 3'-DNA-RNA-5' junction is formed involving the 3'-end of tRNAlys,3. The HIV-RT-associated RNase H cleaves the RNA template strand specifically, opposite the newly synthesized DNA strand. We have determined the crystal structure at 1.9 A resolution of an eight-base pair hybrid duplex representing the junction to identify global or local structural perturbations which may be recognized by HIV-RT RNase H. The junction octamer is in a global A-type conformation throughout. A base pair step with distinct stacking geometry and variable backbone conformation is located next to the main endonucleolytic cleavage site. This base pair step may serve as a recognition site for HIV-RT RNase H. Crystal structure of an eight-base pair duplex containing the 3'-DNA-RNA-5' junction formed during initiation of minus-strand synthesis of HIV replication.,Mueller U, Maier G, Mochi Onori A, Cellai L, Heumann H, Heinemann U Biochemistry. 1998 Sep 1;37(35):12005-11. PMID:9724510 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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