Core Promoter
Core Promoter - Related Videos
02:40
The Eukaryotic Promoter Region
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2020
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...
02:10
The Nucleosome Core Particle
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2020
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins. The paradox Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
02:23
Visualizing the Effect of pH on Solubilization of the Influenza A Viral Core
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2026
Source: Stauffer, S. et al., In Vitro Disassembly of Influenza A Virus Capsids by Gradient Centrifugation. J. Vis. Exp. (2016)This video demonstrates the effect of pH on the solubilization of influenza A viral cores. Gel electrophoresis and protein staining reveal the progressive disassembly of the core structure under acidic conditions.
10:58
Plant Promoter Analysis: Identification and Characterization of Root Nodule Specific Promoter in the Common Bean
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Cited by 15 •
2017
Promoter expression analyses are crucial to improving the understanding of gene regulation and the spatiotemporal expression of target genes. Herein we present a protocol to identify, isolate, and clone a plant promoter. Further, we describe the characterization of the nodule-specific promoter in the common bean hairy roots.
01:15
Promotion Metrics
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2025
Businesses rely on various promotional metrics to gauge the effectiveness of marketing campaigns. Baseline sales represent the average sales without any promotional efforts, while incremental sales measure the increase in sales resulting from a promotion. For example, if a product typically sells 300 units and a promotion increases sales to 400 units, the incremental sales are 100. This distinction is crucial for evaluating the true impact of promotional activities. Impressions count the number...
FAQs
These elements provide alternative sequence cues for basal-complex assembly. The TATA box, initiator (Inr), downstream promoter element, and TFIIB recognition element can be recognized by general transcription factors, which help recruit RNA polymerase II and align it for RNA synthesis. Thus, promoter architecture can influence how the transcription machinery is positioned at the start of a gene.
Enhancers contribute regulatory information, whereas the core promoter supplies the local platform for basal transcription machinery. Their cooperation allows a gene to respond to regulatory signals in different cell types and conditions. Studying this relationship helps explain why transcriptional output depends not only on promoter-proximal sequence features but also on regulatory elements acting with the promoter.
Position relative to the transcription start site is functionally important because it helps determine where RNA synthesis begins. General transcription factors recognize promoter sequence elements in this region and help place RNA polymerase II appropriately. Consequently, changes in core-promoter sequence or organization may affect assembly or positioning of the basal machinery, influencing transcription initiation.
Reporter-gene assays are used to examine how a core promoter supports gene expression. In these experiments, promoter activity is assessed through a reporter-gene readout, allowing investigators to analyze transcriptional regulation. Such assays are useful for comparing promoter behavior in regulatory studies, although interpretation should consider the promoter together with cooperating elements such as enhancers.
Analysis of disease-associated mutations can connect promoter sequence changes with transcriptional regulation. Because core-promoter elements help recruit and position RNA polymerase II, mutations affecting these regions may provide clues about altered gene expression. This makes promoter analysis relevant when investigating how genetic changes influence transcription, while also emphasizing the importance of regulatory context.
Synthetic gene-expression systems apply core-promoter principles to design controlled transcriptional systems. Knowledge of promoter sequence elements helps investigators create designs that support recruitment of basal transcription machinery and initiation of RNA synthesis at a defined site. This application translates mechanistic understanding of eukaryotic transcription into experimental systems for studying or controlling gene expression.