Groundbreaking Discovery: Over 1,700 New Proteins Found in the "Dark Matter" of the Human Genome
"Peptideins" could unlock new frontiers in cancer immunotherapy and drug development.
An international research consortium, TransCODE, has identified a vast new class of human proteins that were previously hidden in "noncoding" regions of the genome. Dubbed peptideins, these over 1,700 molecules challenge long-held assumptions about our genetic blueprint.
Key Findings: The Hidden Proteome
By analyzing 7,264 "non-canonical" Open Reading Frames (ncORFs), scientists found that approximately 25% of these produce small, protein-like molecules. This discovery significantly expands the known human proteome, revealing a layer of biological complexity previously overlooked.
Implications for Cancer Treatment
This discovery holds immediate and powerful implications for medicine:
- Immune System Targets: Many peptideins are expressed on the surface of immune cells and are found at high levels in cancer cells, presenting novel targets for cancer immunotherapy.
- Already in the Pipeline: Some peptideins are already being investigated as potential drug targets.
- Critical Role in Cell Survival: CRISPR gene-editing screens revealed a specific peptidein, OLMALINC, is critical for survival in 85% of 485 cancer cell lines tested. OLMALINC plays a key role in cell division and the DNA damage response, making it a promising candidate for future therapies.
Data Accessibility
In a significant move for open science, the consortium has made all data publicly available. These new "peptideins" will soon be added to major reference databases, including GENCODE, UniProt, and PeptideAtlas, accelerating research worldwide.
About the Consortium
The TransCODE consortium represents a collaboration between leading research institutions, including:
- EMBL's European Bioinformatics Institute
- Princess Máxima Center for Pediatric Oncology
- University of Michigan
- Institute for Systems Biology
- Massachusetts Institute of Technology
The landmark study was published in Nature, supported by multiple funders.