Small Regulatory Rna
Small Regulatory Rna - Related Videos
02:30
Isolation of Small Regulatory RNA–Bound Bacterial Target RNA Using Affinity Purification
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2025
Source: Mercier, N., et. al., MS2-Affinity Purification Coupled with RNA Sequencing in Gram-Positive Bacteria. J. Vis. Exp. (2021)This video demonstrates the isolation of MS2-tagged small regulatory RNA (sRNA) bound to its bacterial target RNA using affinity purification with a maltose-binding protein (MBP)–MS2 coat protein fusion immobilized on amylose resin.
02:02
Cis-regulatory Sequences
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2020
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
09:54
RNA-Seq
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2023
Among different methods to evaluate gene expression, the high-throughput sequencing of RNA, or RNA-seq. is particularly attractive, as it can be performed and analyzed without relying on prior available genomic information. During RNA-seq, RNA isolated from samples of interest is used to generate a DNA library, which is then amplified and sequenced. Ultimately, RNA-seq can determine which genes are expressed, the levels of their expression, and the presence of any previously unknown transcripts.
02:36
RNA Polymerase II Accessory Proteins
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2020
Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
11:34
Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins
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2019
Sequence specificity is critical for gene regulation. Regulatory proteins that recognize specific sequences are important for gene regulation. Defining functional binding sites for such proteins is a challenging biological problem. An iterative approach for identification of a binding site for an RNA-binding protein is described here and is applicable to all RNA-binding proteins.
FAQs
Small regulatory RNA pathways achieve selectivity through complementary base pairing with particular target RNAs. This recognition links a short RNA sequence to a specific regulatory outcome rather than producing a nonspecific change in gene expression. Depending on the biological system, the pairing can act directly on the target RNA or help guide a protein complex that carries out the regulatory effect.
Recognition can produce several distinct outcomes: translation may be blocked, the target RNA may become less stable, or the RNA may undergo cleavage. These mechanisms regulate gene expression at the RNA or protein-production level. Distinguishing among them helps researchers relate a small regulatory RNA pathway to the particular cellular response it produces.
In some systems, the RNA does more than pair with a target sequence directly. It guides a protein complex toward the relevant RNA, allowing that complex to mediate regulation. This arrangement connects sequence recognition with downstream control of translation, RNA stability, or target cleavage, and it illustrates why pathway behavior can vary across biological systems.
By controlling gene expression, these molecules help cells maintain patterns of activity associated with cellular identity and adjust regulatory outputs as conditions change. Their importance extends across organisms, so they provide a biological link between gene regulation and adaptation. The same regulatory capacity also makes them relevant to disease-related processes.
Researchers use these pathways to investigate how particular gene-expression programs are controlled. Because sequence-specific recognition can block translation, alter RNA stability, or promote cleavage, the resulting regulatory effects provide a way to connect target RNAs with their biological roles. This makes small regulatory RNA systems useful for examining gene function within cellular and organismal contexts.
Their control of gene expression connects small regulatory RNA pathways with developmental processes and with interactions between hosts and pathogens. In developmental biology, they help frame questions about changing cellular programs across an organism. In host-pathogen research, the same regulatory principle supports investigation of how gene-expression control participates in biological interactions between organisms.
The sequence-specific nature of these pathways makes them relevant to both biomarker discovery and therapeutic gene silencing. Researchers can study their regulatory patterns as candidates for disease-related indicators, while their ability to reduce or redirect expression of target RNAs provides a conceptual basis for silencing strategies. These applications extend the topic from basic biology into translational research.