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- Codon_usage_bias abstract "Codon usage bias refers to differences in the frequency of occurrence of synonymous codons in coding DNA. A codon is a series of three nucleotides (a triplet) that encodes a specific amino acid residue in a polypeptide chain or for the termination of translation (stop codons).There are 64 different codons (61 codons encoding for amino acids plus 3 stop codons) but only 20 different translated amino acids. The overabundance in the number of codons allows many amino acids to be encoded by more than one codon. Because of such redundancy it is said that the genetic code is degenerate. Different organisms often show particular preferences for one of the several codons that encode the same amino acid- that is, a greater frequency of one will be found than expected by chance. How such preferences arise is a much debated area of molecular evolution.It is generally acknowledged that codon preferences reflect a balance between mutational biases and natural selection for translational optimization. Optimal codons in fast-growing microorganisms, like Escherichia coli or Saccharomyces cerevisiae (baker's yeast), reflect the composition of their respective genomic tRNA pool. It is thought that optimal codons help to achieve faster translation rates and high accuracy. As a result of these factors, translational selection is expected to be stronger in highly expressed genes, as is indeed the case for the above-mentioned organisms. In other organisms that do not show high growing rates or that present small genomes, codon usage optimization is normally absent, and codon preferences are determined by the characteristic mutational biases seen in that particular genome. Examples of this are Homo sapiens (human) and Helicobacter pylori. Organisms that show an intermediate level of codon usage optimization include Drosophila melanogaster (fruit fly), Caenorhabditis elegans (nematode worm), Strongylocentrotus purpuratus (sea urchin) or Arabidopsis thaliana (thale cress).The nature of the codon usage-tRNA optimization has been fiercely debated. It is not clear whether codon usage drives tRNA evolution or vice versa. At least one mathematical model has been developed where both codon-usage and tRNA-expression co-evolve in feedback fashion (i.e., codons already present in high frequencies drive up the expression of their corresponding tRNAs, and tRNAs normally expressed at high levels drive up the frequency of their corresponding codons), however this model does not seem to yet have experimental confirmation. Another problem is that the evolution of tRNA genes has been a very inactive area of research.".
- Codon_usage_bias wikiPageExternalLink inca.
- Codon_usage_bias wikiPageExternalLink CAT.
- Codon_usage_bias wikiPageExternalLink codonw.sourceforge.net.
- Codon_usage_bias wikiPageExternalLink 1774.
- Codon_usage_bias wikiPageExternalLink gcua.schoedl.de.
- Codon_usage_bias wikiPageExternalLink CAIcal.
- Codon_usage_bias wikiPageExternalLink E-CAI.
- Codon_usage_bias wikiPageExternalLink HEG-DB.
- Codon_usage_bias wikiPageExternalLink OPTIMIZER.
- Codon_usage_bias wikiPageExternalLink gcua.
- Codon_usage_bias wikiPageExternalLink gasco.
- Codon_usage_bias wikiPageExternalLink charif04.
- Codon_usage_bias wikiPageExternalLink acua.
- Codon_usage_bias wikiPageExternalLink www.jcat.de.
- Codon_usage_bias wikiPageExternalLink codon.
- Codon_usage_bias wikiPageID "219277".
- Codon_usage_bias wikiPageLength "18370".
- Codon_usage_bias wikiPageOutDegree "53".
- Codon_usage_bias wikiPageRevisionID "707364563".
- Codon_usage_bias wikiPageWikiLink Amino_acid.
- Codon_usage_bias wikiPageWikiLink Amino_acid_synthesis.
- Codon_usage_bias wikiPageWikiLink Arabidopsis_thaliana.
- Codon_usage_bias wikiPageWikiLink C-terminus.
- Codon_usage_bias wikiPageWikiLink Caenorhabditis_elegans.
- Codon_usage_bias wikiPageWikiLink Category:Gene_expression.
- Codon_usage_bias wikiPageWikiLink Category:Molecular_biology.
- Codon_usage_bias wikiPageWikiLink Coding_region.
- Codon_usage_bias wikiPageWikiLink Codon_Adaptation_Index.
- Codon_usage_bias wikiPageWikiLink Directional_selection.
- Codon_usage_bias wikiPageWikiLink Drosophila_melanogaster.
- Codon_usage_bias wikiPageWikiLink Effective_number_of_codons.
- Codon_usage_bias wikiPageWikiLink Endogeny_(biology).
- Codon_usage_bias wikiPageWikiLink Entropy_(information_theory).
- Codon_usage_bias wikiPageWikiLink Enzyme.
- Codon_usage_bias wikiPageWikiLink Escherichia_coli.
- Codon_usage_bias wikiPageWikiLink GC-content.
- Codon_usage_bias wikiPageWikiLink Gene_expression.
- Codon_usage_bias wikiPageWikiLink Genetic_code.
- Codon_usage_bias wikiPageWikiLink Genetic_drift.
- Codon_usage_bias wikiPageWikiLink Helicobacter_pylori.
- Codon_usage_bias wikiPageWikiLink Heterologous_expression.
- Codon_usage_bias wikiPageWikiLink Homo_sapiens.
- Codon_usage_bias wikiPageWikiLink Intergenic_region.
- Codon_usage_bias wikiPageWikiLink Messenger_RNA.
- Codon_usage_bias wikiPageWikiLink Metabolic_engineering.
- Codon_usage_bias wikiPageWikiLink Molecular_evolution.
- Codon_usage_bias wikiPageWikiLink N-terminus.
- Codon_usage_bias wikiPageWikiLink Noncoding_DNA.
- Codon_usage_bias wikiPageWikiLink Nucleic_acid_secondary_structure.
- Codon_usage_bias wikiPageWikiLink Nucleotide.
- Codon_usage_bias wikiPageWikiLink Peptide.
- Codon_usage_bias wikiPageWikiLink Primary_transcript.
- Codon_usage_bias wikiPageWikiLink Prokaryote.
- Codon_usage_bias wikiPageWikiLink Protein_folding.
- Codon_usage_bias wikiPageWikiLink Ribosomal_binding_site.
- Codon_usage_bias wikiPageWikiLink Ribosome.
- Codon_usage_bias wikiPageWikiLink Saccharomyces_cerevisiae.
- Codon_usage_bias wikiPageWikiLink Sea_urchin.
- Codon_usage_bias wikiPageWikiLink Start_codon.
- Codon_usage_bias wikiPageWikiLink Stop_codon.
- Codon_usage_bias wikiPageWikiLink Strongylocentrotus_purpuratus.
- Codon_usage_bias wikiPageWikiLink Synonymous_substitution.
- Codon_usage_bias wikiPageWikiLink Transcription_(genetics).
- Codon_usage_bias wikiPageWikiLink Transfer_RNA.
- Codon_usage_bias wikiPageWikiLink Transgene.
- Codon_usage_bias wikiPageWikiLink Translation.
- Codon_usage_bias wikiPageWikiLink Worm.
- Codon_usage_bias wikiPageWikiLinkText "Codon usage bias".
- Codon_usage_bias wikiPageWikiLinkText "codon choices".
- Codon_usage_bias wikiPageWikiLinkText "codon optimization".
- Codon_usage_bias wikiPageWikiLinkText "codon usage bias".
- Codon_usage_bias wikiPageWikiLinkText "codon usage".
- Codon_usage_bias wikiPageWikiLinkText "codon usages".
- Codon_usage_bias wikiPageWikiLinkText "codon-usage bias".
- Codon_usage_bias wikiPageWikiLinkText "human codon optimized".
- Codon_usage_bias wikiPageUsesTemplate Template:Reflist.
- Codon_usage_bias subject Category:Gene_expression.
- Codon_usage_bias subject Category:Molecular_biology.
- Codon_usage_bias type Process.
- Codon_usage_bias comment "Codon usage bias refers to differences in the frequency of occurrence of synonymous codons in coding DNA. A codon is a series of three nucleotides (a triplet) that encodes a specific amino acid residue in a polypeptide chain or for the termination of translation (stop codons).There are 64 different codons (61 codons encoding for amino acids plus 3 stop codons) but only 20 different translated amino acids.".
- Codon_usage_bias label "Codon usage bias".
- Codon_usage_bias sameAs Q1106472.
- Codon_usage_bias sameAs Codon_Usage.
- Codon_usage_bias sameAs Biais_dusage_du_code.
- Codon_usage_bias sameAs m.01g1v3.
- Codon_usage_bias sameAs Предпочтение_кодонов.
- Codon_usage_bias sameAs Q1106472.
- Codon_usage_bias wasDerivedFrom Codon_usage_bias?oldid=707364563.
- Codon_usage_bias isPrimaryTopicOf Codon_usage_bias.