Proteogenomics to discover the full coding content of genomes: a computational perspective

Area of Science:

• Biochemistry
• Genomics
• Proteomics

Background:

• Proteogenomics bridges genomics and proteomics using tandem mass spectrometry.
• It aids in identifying and characterizing protein-coding genes, offering insights beyond traditional methods.

Purpose of the Study:

• To review the current state of proteogenomics, highlighting successes and computational roles.
• To discuss technological hurdles and future directions in the field.

Main Methods:

• Searching tandem mass spectra against genomic databases.
• Utilizing proteogenomic peptides for gene annotation (e.g., translation, splicing, novel genes).

Main Results:

• Proteogenomics confirms translation, determines reading frames, and identifies gene/exon boundaries.
• It provides evidence for post-translational modifications and alternative splicing, aiding novel gene prediction.

Conclusions:

• Technological and algorithmic advancements enable large-scale proteogenomic studies in model organisms.
• Future efforts focus on complex gene structures, cross-species genome searching, and immunoglobulin gene reconstruction.