Human immunodeficiency virus type 1 (HIV-1) uses tRNA 3 Lys as a primer for reverse transcription and, during viral assembly, this tRNA is selectively packaged into the virus along with the other major tRNA Lys , tRNA 1,2 Lys. Increasing the cytoplasmic concentration of tRNA 3 Lys through transfection of cells with a plasmid containing both HIV-1 proviral DNA and a tRNA 3 Lys gene results in a ...

Transfer RNAs play a crucial role in protein translation where they bring amino acids to the ribosome be incorporated into nascent polypeptide chains. During stress conditions tRNAs can cleaved generate tRNA-derived fragments. Several ribonucleases have been identified that cleave tRNA, however mutations stress-induced ribonuclease Angiogenin range of neurological disorders including Amyotrophi...

Studies on translation frequently require large amounts of purified individual tRNAs. However, few purified tRNAs are commercially available. Individual tRNAs can be easily produced by in vitro transcription, but the lack of modifications of the tRNA transcripts may influence or impair their function [1,2]. The purification of specific tRNAs from total tRNA is a laborious process that requires ...

Phenotypically, Photobacterium damselae subsp. piscicida and P. damselae subsp. damselae are easily distinguished. However, their 16S rRNA gene sequences are identical, and attempts to discriminate these two subspecies by molecular tools are hampered by their high level of DNA-DNA similarity. The 16S-23S rRNA internal transcribed spacers (ITS) were sequenced in two strains of Photobacterium dam...

PreQ1 (2) is a precursor of queuine (1) that in eubacteria incorporated into transfer RNA (tRNA) by tRNA guanine transglycosylase (TGT) before being further elaborated queuine. The modification unusual and occurs across all eukaryotes with few exceptions, but its function remains unclear. As the modified nucleotide through incorporation specially synthesized instead via genetically encoded base...

The Coregonus lavaretus (Linnaeus, 1758) complex is a morphologically and genetically diverse group of whitefish. Its taxonomic structure has been controversial for almost century. At least 25 forms C. have described in Siberia, but there still no consensus on their intraspecific taxonomy. pidschian (Gmelin, 1789) was as subspecies lavaretus. Recently, it assumed that this also complex. purpose...

We sampled 119 Nelore cattle (Bos indicus), 69 harboring B. indicus mtDNA plus 50 carrying Bos taurus mtDNA, to estimate the frequencies of putative mtDNA single nucleotide polymorphisms (SNPs) and investigate their association with Nelore weight and scrotal circumference estimated breeding values (EBVs). The PCR restriction fragment length polymorphism (PCR-RFLP) method was used to detect poly...

Transfer RNAs isolated from E. coli grown in media where ferric iron is not freely available show well characterized chromatographic changes due to the absence of the methylthio moiety of ms2i6A. The altered tRNA molecules include tRNA trp tRNA tyr, tRNA phe and two minor tRNA ser species. It has been suggested that methylthiolation of tRNA affects its function in regulation. We now show iron-r...

Formyltetrahydrofolic acid:methionyl-tRNA transformylase was isolated from Saccharomyces cerevisiae mitochondria and used to prepare yeast mitochondrial [(3)H]formylmethionyl-tRNA. This fMet-tRNA hybridizes with mitochondrial DNA but not with yeast nuclear or E. coli DNA. Unlabeled mitochondrial, but not extramitochondrial, tRNA competes in this reaction. tRNA was eluted from the hybrid and fou...

Leafhoppers have been identified as a serious threat to different plants. To explore the characteristics of mitogenomes and reveal phylogenetic positions two species in Typhlocybinae, complete Singapora shinshana Seriana bacilla were sequenced annotated for first time with lengths 15,402 bp 15,383 bp, respectively. The contained 13 PCGs, 22 tRNA genes 2 rRNA genes. genome content, gene order, n...