Proteomics

Dataset Information

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Spotlight on alternative frame coding: two long overlapping genes in Pseudomonas aeruginosa are translated and under purifying selection


ABSTRACT: The existence of overlapping genes (OLGs) with significant coding overlaps revolutionises our understanding of genomic complexity. We report two exceptionally long (957 nt and 1536 nt), evolutionarily novel, translated antisense open reading frames (ORFs) embedded within annotated genes in the medically important Gram-negative bacterium Pseudomonas aeruginosa. Both OLG pairs show sequence features consistent with being genes and transcriptional signals in RNA sequencing data. Translation of both OLGs was confirmed by ribosome profiling and mass spectrometry. Quantitative proteomics of samples taken during different phases of growth revealed regulation of protein abundances, implying biological functionality. Both OLGs are taxonomically highly restricted, and likely arose by overprinting within the genus. Evidence for purifying selection further supports functionality. The OLGs reported here, designated olg1 and olg2, are the longest yet proposed in prokaryotes and are among the best attested in terms of translation and evolutionary constraint. These results highlight a potentially large unexplored dimension of prokaryotic genomes.

INSTRUMENT(S): Orbitrap Fusion Lumos

ORGANISM(S): Pseudomonas Aeruginosa Pao1

SUBMITTER: Christina Ludwig  

LAB HEAD: Christina Ludwig

PROVIDER: PXD023992 | Pride | 2022-03-21

REPOSITORIES: Pride

Dataset's files

Source:
Action DRS
BBM_290_P110__001.raw Raw
BBM_290_P110__002.raw Raw
BBM_290_P110__003.raw Raw
BBM_290_P110__004.raw Raw
BBM_290_P110__005.raw Raw
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Publications

Spotlight on alternative frame coding: Two long overlapping genes in <i>Pseudomonas aeruginosa</i> are translated and under purifying selection.

Kreitmeier Michaela M   Ardern Zachary Z   Abele Miriam M   Ludwig Christina C   Scherer Siegfried S   Neuhaus Klaus K  

iScience 20220201 2


The existence of overlapping genes (OLGs) with significant coding overlaps revolutionizes our understanding of genomic complexity. We report two exceptionally long (957 nt and 1536 nt), evolutionarily novel, translated antisense open reading frames (ORFs) embedded within annotated genes in the pathogenic Gram-negative bacterium <i>Pseudomonas aeruginosa</i>. Both OLG pairs show sequence features consistent with being genes and transcriptional signals in RNA sequencing. Translation of both OLGs w  ...[more]

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