Tumour-suppressor proteins articles from across Nature Portfolio

This protocol describes the establishment of a reversible replication barrier using plasmid templates containing a lacO array bound by LacR repressor. The method allows fine control of replication fork movement and replication fork encounter with DNA lesions.

Two independent studies published together in Nature find that AT1 cells can have a role in both the initiation and suppression of lung adenocarcinoma.

A study on a yeast model explores how ssDNA gaps induce cell death and genomic instability, implicating Rad9 and Rad51 in gap repair and protection. Gaps forming secondary structures trigger chromosome fragility, deletions, rearrangements, or cell death pathways, showing how gaps are a vulnerability in cancer cells with opportunity for selective targeting.

Increased tRNA abundance and amino acid coupling generally promote increased oncogenesis. By contrast, a new study shows that in breast cancer, the leucyl-tRNA synthetase LARS suppresses transformation and tumour development by increasing tRNA-Leu^CAG translation of certain tumour suppressor mRNAs.

A genome-wide CRISPR screen finds CIP2A as a new synthetic lethal target for BRCA1- and BRCA2-deficient cells. Unlike PARP inhibition that increases replication-induced DNA double-strand breaks and radial chromosomes, depleting CIP2A or disrupting its interaction with TOPBP1 increases micronuclei and chromosomal missegregation, revealing a mitotic target for BRCA-mutated tumors.