{"doi":"10.1128/jb.01356-06","title":"Naturally Occurring Adenines within mRNA Coding Sequences Affect Ribosome Binding and Expression in\n            <i>Escherichia coli</i>","abstract":"<jats:title>ABSTRACT</jats:title>\n          <jats:p>\n            Translation initiation requires the precise positioning of a ribosome at the start codon. The major signals of bacterial mRNA that direct the ribosome to a translational start site are the Shine-Dalgarno (SD) sequence within the untranslated leader and the start codon. Evidence for the presence of many non-SD-led genes in prokaryotes provides a motive for studying additional interactions between ribosomes and mRNA that contribute to translation initiation. A high incidence of adenines has been reported downstream of the start codon for many\n            <jats:italic>Escherichia coli</jats:italic>\n            genes, and addition of downstream adenine-rich sequences increases expression from several genes in\n            <jats:italic>E. coli</jats:italic>\n            . Here we describe site-directed mutagenesis of the\n            <jats:italic>E. coli aroL</jats:italic>\n            ,\n            <jats:italic>pncB</jats:italic>\n            , and\n            <jats:italic>cysJ</jats:italic>\n            coding sequences that was used to assess the contribution of naturally occurring adenines to in vivo expression and in vitro ribosome binding from mRNAs with different SD-containing untranslated leaders. Base substitutions that decreased the downstream adenines by one or two nucleotides decreased expression significantly from\n            <jats:italic>aroL-</jats:italic>\n            ,\n            <jats:italic>pncB-</jats:italic>\n            , and\n            <jats:italic>cysJ-lacZ</jats:italic>\n            fusions; mutations that increased downstream adenines by one or two nucleotides increased expression significantly from\n            <jats:italic>aroL</jats:italic>\n            - and\n            <jats:italic>cysJ</jats:italic>\n            -\n            <jats:italic>lacZ</jats:italic>\n            fusions. Using primer extension inhibition (toeprint) and filter binding assays to measure ribosome binding, the changes in in vivo expression correlated closely with changes in in vitro ribosome binding strength. Our data are consistent with a model in which downstream adenines influence expression through their effects on the mRNA-ribosome association rate and the amount of ternary complex formed. This work provides evidence that adenine-rich sequence motifs might serve as a general enhancer of\n            <jats:italic>E. coli</jats:italic>\n            translation.\n          </jats:p>","journal":"Journal of Bacteriology","year":2007,"id":21743,"datarank":2.2679288439655125,"base_score":3.7376696182833684,"endowment":3.7376696182833684,"self_citation_contribution":0.5606504427425053,"citation_network_contribution":1.7072784012230073,"self_endowment_contribution":0.5606504427425053,"citer_contribution":1.7072784012230073,"corpus_percentile":null,"corpus_rank":null,"citation_count":41,"citer_count":38,"citers_with_citation_signal":35,"citers_with_endowment":35,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":138912,"name":"Robert L. Paz","orcid":null,"position":1,"is_corresponding":false},{"id":138913,"name":"Patrick Cottle","orcid":null,"position":2,"is_corresponding":false},{"id":136626,"name":"Gary R. Janssen","orcid":null,"position":3,"is_corresponding":false},{"id":138791,"name":"Jay E. Brock","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"base_score":3.7376696182833684,"endowment":3.7376696182833684,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"17085569","pmcid":"PMC1797414","openalex_id":"https://openalex.org/W2103867145","authors":[],"funders":[{"funder_name":"NIGMS NIH HHS","grant_id":"GM065120","title":null},{"funder_name":"NIGMS NIH HHS","grant_id":"R15 GM065120","title":null}],"total_grants":2,"fwci":1.363,"citation_percentile":0.79332064,"influential_citations":2,"citation_trend":[{"year":2012,"count":2},{"year":2013,"count":2},{"year":2014,"count":4},{"year":2016,"count":2},{"year":2017,"count":2},{"year":2018,"count":3},{"year":2019,"count":2},{"year":2020,"count":1},{"year":2021,"count":3},{"year":2022,"count":1},{"year":2023,"count":1},{"year":2025,"count":2}],"oa_status":"green","license":"https://journals.asm.org/non-commercial-tdm-license","oa_locations":[{"url":"https://www.ncbi.nlm.nih.gov/pmc/articles/1797414","host_type":"repository"},{"url":"https://europepmc.org/articles/pmc1797414?pdf=render","host_type":"GREEN"},{"url":"https://www.ncbi.nlm.nih.gov/pmc/articles/1797414","host_type":"repository"},{"url":"https://journals.asm.org/doi/pdf/10.1128/JB.01356-06","host_type":"publisher"},{"url":"https://doi.org/10.1128/jb.01356-06","host_type":"journal"},{"url":"https://pubmed.ncbi.nlm.nih.gov/17085569","host_type":"repository"}],"fields_of_study":["RNA and protein synthesis mechanisms","RNA modifications and cancer","Bacterial Genetics and Biotechnology","Biology","Medicine","Adenine","Bacterial Proteins","Base Sequence","Binding Sites","Codon, Initiator","Escherichia coli","Kinetics","Membrane Proteins","Molecular Sequence Data","Mutagenesis, Site-Directed","Pentosyltransferases","Peptide Chain Initiation, Translational","Phosphotransferases (Alcohol Group Acceptor)","Protein Biosynthesis","RNA, Messenger","Ribosomes"],"mesh_terms":["Adenine","Bacterial Proteins","Base Sequence","Binding Sites","Escherichia coli","Kinetics","Membrane Proteins","Molecular Sequence Data","Pentosyltransferases","Peptide Chain Initiation, Translational","Ribosomes","RNA, Messenger","Protein Biosynthesis","Mutagenesis, Site-Directed","Phosphotransferases (Alcohol Group Acceptor)","Codon, Initiator"],"keywords":["Biology","Escherichia coli","Ribosome","Genetics","Messenger RNA","Escherichia coli Proteins","Affect (linguistics)","Coding region","Cell biology","RNA","Gene"],"sdg_mappings":[],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-06-06T16:41:45.513392Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}