Journal
JOURNAL OF BACTERIOLOGY
Volume 184, Issue 20, Pages 5733-5745Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JB.184.20.5733-5745.2002
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Funding
- NHGRI NIH HHS [5R01HG00335-13] Funding Source: Medline
- NIGMS NIH HHS [R01 GM010452, 5R01GM10452-38] Funding Source: Medline
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This work assesses relationships for 30 complete prokaryotic genomes between the presence of the Shine-Dalgarno (SD) sequence and other gene features, including expression levels, type of start codon, and distance between successive genes. A significant positive correlation of the presence of an SD sequence and the predicted expression level of a gene based on codon usage biases was ascertained, such that predicted highly expressed genes are more likely to possess a strong SD sequence than average genes. Genes with AUG start codons are more likely than genes with other start codons, GUG or UUG, to possess an SD sequence. Genes in close proximity to upstream genes on the same coding strand in most genomes are significantly higher in SD presence. In light of these results, we discuss the role of the SD sequence in translation initiation and its relationship with predicted gene expression levels and with operon structure in both bacterial and archaeal genomes.
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