Domanda del libro di testo
Write a short essay describing how an mRNA may be regulated in three different ways by specific cis-elements and RBPs.
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Ch. 18 - Post-transcriptional Regulation in Eukaryotes
Klug12th EditionConcepts of GeneticsISBN: 9780135564776
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TOC.tableOfContents
- Ch. 1 - Introduction to Genetics17
- Ch. 2 - Mitosis and Meiosis36
- Ch. 3 - Mendelian Genetics51
- Ch. 4 - Extensions of Mendelian Genetics74
- Ch. 5 - Chromosome Mapping in Eukaryotes51
- Ch. 6 - Genetic Analysis and Mapping in Bacteria and Bacteriophages46
- Ch. 7 - Sex Determination and Sex Chromosomes33
- Ch. 8 - Chromosome Mutations: Variation in Number and Arrangement40
- Ch. 9 - Extranuclear Inheritance31
- Ch. 10 - DNA Structure and Analysis43
- Ch. 11 - DNA Replication and Recombination44
- Ch. 12 - DNA Organization in Chromosomes30
- Ch. 13 - The Genetic Code and Transcription54
- Ch. 14 - Translation and Proteins47
- Ch. 15 - Gene Mutation, DNA Repair, and Transposition41
- Ch. 16 - Regulation of Gene Expression in Bacteria29
- Ch. 17 - Transcriptional Regulation in Eukaryotes41
- Ch. 18 - Post-transcriptional Regulation in Eukaryotes33
- Ch. 19 - Epigenetics33
- Ch. 20 - Recombinant DNA Technology44
- Ch. 21 - Genomic Analysis36
- Ch. 22 - Applications of Genetic Engineering and Biotechnology36
- Ch. 23 - Developmental Genetics37
- Ch. 24 - Cancer Genetics34
- Ch. 25 - Quantitative Genetics and Multifactorial Traits54
- Ch. 26 - Population and Evolutionary Genetics45
Klug12th EditionConcepts of GeneticsISBN: 9780135564776Non è quello che usi tu?Cambia libro di testo
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Klug 12th EditionCh. 18 - Post-transcriptional Regulation in EukaryotesProblema 1d
Klug 12th EditionCh. 18 - Post-transcriptional Regulation in EukaryotesProblema 1dCapitolo 18, Problema 1d
How do we know that microRNAs negatively regulate target mRNAs?
Guida verificata passo dopo passo1
Understand that microRNAs (miRNAs) are small non-coding RNA molecules that regulate gene expression by binding to complementary sequences on target mRNAs, leading to their degradation or translational repression.
Review experimental approaches such as reporter assays where a reporter gene is fused to the target mRNA sequence; observe that the presence of specific miRNAs reduces reporter gene expression, indicating negative regulation.
Examine loss-of-function and gain-of-function experiments: knocking down or deleting a miRNA leads to increased levels of its target mRNA or protein, while overexpressing the miRNA decreases target expression.
Consider biochemical methods like RNA immunoprecipitation to show physical association between miRNAs and their target mRNAs within the RNA-induced silencing complex (RISC), supporting direct regulation.
Analyze genome-wide studies such as microarray or RNA sequencing data that reveal inverse correlations between miRNA levels and their predicted target mRNAs, reinforcing the concept of negative regulation.
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MicroRNA (miRNA) Function
MicroRNAs are small non-coding RNA molecules that regulate gene expression by binding to complementary sequences on target mRNAs, leading to mRNA degradation or inhibition of translation. This posttranscriptional regulation reduces the production of specific proteins.
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08:26
Functional Genomics
Experimental Evidence for miRNA Regulation
Researchers use techniques such as reporter assays, loss- and gain-of-function experiments, and RNA immunoprecipitation to demonstrate that miRNAs bind target mRNAs and reduce their expression. Observing decreased protein levels or mRNA stability upon miRNA activity confirms their negative regulatory role.
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06:38Regulation
Mechanisms of Posttranscriptional Gene Regulation
Posttranscriptional regulation involves controlling mRNA stability, localization, and translation after transcription. miRNAs contribute by guiding RNA-induced silencing complexes (RISCs) to target mRNAs, which results in mRNA cleavage or translational repression, thereby fine-tuning gene expression.
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09:22Review of Regulation
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