Rna Directionality
Rna Directionality - Related Videos
07:27
Direct Restart of a Replication Fork Stalled by a Head-On RNA Polymerase
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Cited by 11 •
2010
The fate of the replisome following a collision with a head-on RNA polymerase (RNAP) is unknown. We find that the replisome stalls upon collision with a head-on RNAP, but resumes elongation after displacing the RNAP from DNA. Mfd promotes replication restart by facilitating displacement of the RNAP after the collision.
10:53
Isolation of Cognate RNA-protein Complexes from Cells Using Oligonucleotide-directed Elution
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Cited by 3 •
2017
This manuscript describes an approach to isolate select cognate RNPs formed in eukaryotic cells via a specific oligonucleotide-directed enrichment. We demonstrate the applicability of this approach by isolating a cognate RNP bound to the retroviral 5' untranslated region that is composed of DHX9/RNA helicase A.
10:52
Visualization and Quantification of Intermolecular RNA Base Pairing in in vitro RNA Clusters Using Split Broccoli RNA Reporters
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2026
This protocol describes a visual assay using split Broccoli RNA reporters to detect and quantify intermolecular base pairing in RNA clusters in vitro.
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.
07:04
Site-Directed Mutagenesis for In Vitro and In Vivo Experiments Exemplified with RNA Interactions in Escherichia Coli
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Cited by 2 •
2019
Site-directed mutagenesis is a technique used to introduce specific mutations in deoxyribonucleic acid (DNA). This protocol describes how to do site-directed mutagenesis with a 2-step and 3-step polymerase chain reaction (PCR) based approach, which is applicable to any DNA fragment of interest.
FAQs
During transcription, RNA polymerase extends the growing strand only at its 3′ end, producing RNA in the 5′-to-3′ direction. To do so, it reads the complementary template in the opposite orientation. This arrangement connects template orientation with the sequence and polarity of the transcript, helping researchers determine which strand represents the transcribed product.
The phosphodiester linkage between neighboring riboses is not merely structural. Its 5′-phosphate-to-3′-hydroxyl arrangement creates chemically different termini that enzymes can recognize. Consequently, RNA processing and degradation are orientation-dependent rather than interchangeable from either end. Preserving these distinctions is important when interpreting how an RNA molecule is handled during splicing or breakdown.
RNA directionality coordinates several stages of gene expression because transcription, translation, splicing, and degradation each interact with an oriented molecule. The same nucleotide sequence therefore cannot be interpreted independently of its 5′ and 3′ context. In biology, this helps explain why strand orientation affects enzyme and ribosome binding, movement, and the fate of the resulting RNA.
When designing primers or probes for RNA experiments, researchers must account for the molecule’s 5′ and 3′ orientation rather than treating its sequence as directionless. The intended target must be interpreted in the correct strand orientation so the reagent can be matched to the relevant transcript. This principle is essential for reliable sequence-specific analysis.
RNA sequencing data require attention to transcript orientation during analysis. Researchers use the polarity of the RNA strand to interpret sequence information in the direction represented by the transcript and to relate that information to gene orientation. Ignoring this relationship can make strand assignments or transcript interpretations inconsistent with the underlying biology, so directionality is part of data interpretation.
In gene-expression studies, RNA directionality links gene orientation to the RNA product made from its complementary template. This connection helps researchers distinguish the strand being transcribed and organize observations about transcription, translation, splicing, and degradation. The concept is therefore relevant beyond molecular structure: it provides a framework for interpreting how genetic information moves through multiple stages of biology.