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Structural constraints in the HIV-1 reverse transcriptase-primer/template complex for the initiation of DNA synthesis from primer tRNALys3. 1998

O D Zakharova, and I V Martiyanov, and O A Timofeeva, and T I Kolocheva, and M Fournier, and M L Andreola, and G A Maksakova, and V I Yamkovoy, and S Litvak, and L Tarrago-Litvak, and G A Nevinsky
Novosibirsk Institute of Bioorganic Chemistry, Russian Academy of Sciences, Novosibirsk.

The topography and functional implications of the complex formed in vitro between human immunodeficiency virus type 1 (HIV-1) reverse transcriptase (RT) and its primer tRNALys3 were studied in this work. On the basis of previous results showing the high affinity both of the native primer, tRNALys3, as well as that of mismatched short oligonucleotide primers for HIV-1 RT, we synthesized chimeric primers containing tRNALys3 linked to U and T residues of different lengths. We found that the affinity of the oligonucleotide primers for HIV-1 RT is dramatically increased when linked to primer tRNA. Our results also show that in the tRNA.RT complex, before annealing tRNALys3 to the retroviral RNA genome, the 3'-terminal nucleotide of tRNALys3 is positioned at a distance of one nucleotide unit away from the template in the active polymerization site of the enzyme.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D009841 Oligonucleotides Polymers made up of a few (2-20) nucleotides. In molecular genetics, they refer to a short sequence synthesized to match a region where a mutation is known to occur, and then used as a probe (OLIGONUCLEOTIDE PROBES). (Dorland, 28th ed) Oligonucleotide
D011061 Poly A A group of adenine ribonucleotides in which the phosphate residues of each adenine ribonucleotide act as bridges in forming diester linkages between the ribose moieties. Adenine Polynucleotides,Polyadenylic Acids,Poly(rA),Polynucleotides, Adenine
D003596 Cytosine A pyrimidine base that is a fundamental unit of nucleic acids.
D004279 DNA, Viral Deoxyribonucleic acid that makes up the genetic material of viruses. Viral DNA
D001665 Binding Sites The parts of a macromolecule that directly participate in its specific combination with another molecule. Combining Site,Binding Site,Combining Sites,Site, Binding,Site, Combining,Sites, Binding,Sites, Combining
D012313 RNA A polynucleotide consisting essentially of chains with a repeating backbone of phosphate and ribose units to which nitrogenous bases are attached. RNA is unique among biological macromolecules in that it can encode genetic information, serve as an abundant structural component of cells, and also possesses catalytic activity. (Rieger et al., Glossary of Genetics: Classical and Molecular, 5th ed) RNA, Non-Polyadenylated,Ribonucleic Acid,Gene Products, RNA,Non-Polyadenylated RNA,Acid, Ribonucleic,Non Polyadenylated RNA,RNA Gene Products,RNA, Non Polyadenylated
D012357 RNA, Transfer, Lys A transfer RNA which is specific for carrying lysine to sites on the ribosomes in preparation for protein synthesis. Lysine-Specific tRNA,Transfer RNA, Lys,tRNALys,tRNA(Lys),Lys Transfer RNA,Lysine Specific tRNA,RNA, Lys Transfer,tRNA, Lysine-Specific
D013698 Templates, Genetic Macromolecular molds for the synthesis of complementary macromolecules, as in DNA REPLICATION; GENETIC TRANSCRIPTION of DNA to RNA, and GENETIC TRANSLATION of RNA into POLYPEPTIDES. Genetic Template,Genetic Templates,Template, Genetic
D013941 Thymine One of four constituent bases of DNA. 5-Methyluracil,5 Methyluracil

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