Category: Lab Notes: Molecular Biology

RNA quality control protects cells from defective transcripts produced by errors in transcription, RNA processing, splicing, and translation. Learn how RNA surveillance, nonsense-mediated decay, the RNA exosome, and other degradation pathways maintain RNA integrity and cellular function.

RNA export and localization control where RNA molecules move and function inside cells. Learn how RNA processing, nuclear export, RNA-binding proteins, molecular motors, localization signals, and cellular compartments regulate RNA transport, translation, and gene expression.

RNA editing is a post-transcriptional process that changes RNA sequences after transcription. Explore A-to-I and C-to-U editing, ADAR and APOBEC enzymes, RNA regulation, gene expression, disease, and RNA-based therapeutic applications.

RNA stability and degradation control how long RNA molecules remain functional inside cells. Learn how deadenylation, decapping, RNA exonucleases, the exosome, nonsense-mediated decay, microRNA, and RNA interference regulate RNA turnover and gene expression.

RNA modifications are chemical changes made to RNA molecules after or during their synthesis that can influence RNA structure, stability,…

Alternative splicing allows cells to produce multiple RNA transcripts and protein isoforms from a single gene. Learn how exon skipping, alternative splice sites, splicing factors, and the spliceosome regulate gene expression and contribute to development, disease, and therapeutic applications.

Small interfering RNAs, or siRNAs, are short RNA molecules that silence specific genes by guiding RNA-induced silencing complexes toward complementary messenger RNAs. Learn how Dicer, Argonaute, and RISC mediate gene knockdown and how siRNA is used in research, functional genomics, and RNA therapeutics.

Gene regulation controls when, where, and how strongly genes are expressed. Explore transcription factors, promoters, enhancers, chromatin, epigenetics, RNA processing, translation, and protein regulation.

RNA processing transforms newly transcribed RNA molecules into mature and functional RNAs. Learn about 5′ capping, RNA splicing, alternative splicing, polyadenylation, RNA editing, RNA modifications, RNA transport, and quality control.

Genome organization describes how DNA, genes, regulatory elements, repetitive sequences, and chromosomes are arranged and regulated. Explore chromatin, epigenetics, genome architecture, DNA replication, genetic variation, and genomic regulation.

Nucleotides are fundamental molecules that form DNA and RNA while also supporting cellular energy, signaling, metabolism, and genetic processes. Learn about their structure, functions, synthesis, and biological importance.

Hsp70 substrate binding allows this molecular chaperone to recognize unfolded and partially folded proteins, stabilize exposed hydrophobic regions, prevent aggregation, and regulate protein folding through ATP-dependent binding and release cycles.

Hsp70 has a dynamic molecular architecture consisting of a nucleotide-binding domain, substrate-binding domain, interdomain linker, and regulatory lid. Learn how these structural elements work together to control protein binding and folding.

Hsp70 (heat shock protein 70) is a major molecular chaperone that helps maintain cellular protein homeostasis. Discover its structure, ATPase cycle, protein-folding functions, co-chaperones, stress response, disease associations, and therapeutic potential.

GroEL is a bacterial Hsp60 chaperonin that assists protein folding through ATP-dependent structural changes. Learn how its equatorial, intermediate, and apical domains, double-ring architecture, oligomerization, and interaction with GroES create a dynamic protein-folding machine.