Science · Molecular Biology
how does ubiquitin chain topology determine substrate fate in cells?
Cells interpret ubiquitin decorations through the physical arrangement of ubiquitin molecules known as ubiquitin chain topology. A single ubiquitin can be attached to a substrate or multiple ubiquitins can form
how does adar-mediated rna editing influence neuronal transcriptome diversity?
ADAR-mediated RNA editing reshapes neuronal transcriptomes by converting adenosine to inosine within double-stranded RNA, a biochemical change read as guanosine by the cellular machinery. This A-to-I editing alters codons, splice
what roles do rna g-quadruplexes play in translation regulation?
Structural basis and detection
RNA G-quadruplexes are four-stranded secondary structures formed by stacked guanine quartets stabilized by monovalent cations. Work by Shankar Balasubramanian at University of Cambridge applied transcriptome-wide mapping methods
why do synonymous codon changes affect protein folding efficiency?
Cells use the genetic code to translate mRNA into protein, but not all synonymous codons—different triplets that encode the same amino acid—are equivalent. Work by Joshua B. Plotkin, University of
how does mitochondrial dna replication differ from nuclear replication?
Mitochondrial DNA replication differs from nuclear replication in origin, machinery, timing, and evolutionary consequences. The mitochondrial genome is small, circular, and exists in multiple copies per organelle, while nuclear DNA
how is telomerase activity regulated during cellular differentiation?
Cellular differentiation typically coincides with a programmed downregulation of telomerase activity that balances tissue growth, genome stability, and cancer risk. Pioneering work by Elizabeth Blackburn at University of California, San
how do ribosomes ensure accurate translation of mrna?
Ribosomes achieve high fidelity in protein synthesis through a combination of precise molecular recognition, structural checks, and energy-dependent proofreading. These mechanisms work together to minimize errors while balancing the need
how do chaperone proteins assist protein folding?
Proteins must adopt precise three-dimensional shapes to function. The cellular environment is crowded and dynamic, so molecular chaperones act as specialized helpers that prevent incorrect interactions, guide folding pathways, and,
what determines rna polymerase pausing during transcription?
RNA polymerase pausing is a fundamental, regulated interruption of RNA synthesis that shapes gene expression, cotranscriptional RNA processing, and genome stability. Multiple molecular features determine where and how long polymerases
how does m6a modification affect mrna stability?
N6-methyladenosine (m6A) is a widespread chemical modification of messenger RNA that influences how long transcripts persist in the cell. Early transcriptome-wide mapping by Samie Jaffrey at Weill Cornell Medicine revealed