Domanda del libro di testo
The regulation of mRNA decay relies heavily upon deadenylases and decapping enzymes. Explain how these classes of enzymes are critical to initiating mRNA decay.
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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 6
Klug 12th EditionCh. 18 - Post-transcriptional Regulation in EukaryotesProblema 6Capitolo 18, Problema 6
Explain how a tissue-specific RNA-binding protein can lead to tissue-specific alternative splicing via splicing enhancers or splicing silencers.
Guida verificata passo dopo passo1
Understand that alternative splicing is a process where different combinations of exons are joined together to produce multiple mRNA variants from a single gene, allowing for tissue-specific protein diversity.
Recognize that RNA-binding proteins (RBPs) can influence splicing by binding to specific sequences on the pre-mRNA called splicing enhancers or splicing silencers, which are regulatory elements that promote or inhibit the use of nearby splice sites.
Identify that tissue-specific RNA-binding proteins are expressed only in certain cell types or tissues, so their presence or absence determines which splicing enhancers or silencers are active in that tissue.
Explain that when a tissue-specific RBP binds to a splicing enhancer (often called an exonic splicing enhancer, ESE), it recruits the splicing machinery to promote inclusion of a particular exon in the mature mRNA in that tissue.
Conversely, when the RBP binds to a splicing silencer (such as an intronic splicing silencer, ISS), it blocks the splicing machinery from recognizing a splice site, leading to exclusion of that exon in the tissue where the RBP is present.
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Alternative Splicing
Alternative splicing is a process by which different combinations of exons are joined together from a single pre-mRNA transcript, resulting in multiple mRNA variants and protein isoforms. This mechanism increases proteomic diversity and allows cells to produce tissue-specific proteins by including or excluding certain exons.
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01:57
Alternative DNA Forms
RNA-Binding Proteins and Tissue Specificity
RNA-binding proteins (RBPs) recognize specific RNA sequences or structures and regulate splicing decisions. Tissue-specific RBPs are expressed only in certain cell types, enabling them to influence splicing patterns uniquely in those tissues by binding to regulatory elements on the pre-mRNA.
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05:05Proteins
Splicing Enhancers and Silencers
Splicing enhancers and silencers are short RNA sequence motifs that promote or inhibit the use of nearby splice sites. RBPs bind to these elements to either recruit or block the spliceosome, thereby modulating exon inclusion or skipping in a tissue-specific manner.
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09:22Review of Regulation
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Nonsense-mediated decay is an mRNA surveillance pathway that eliminates mRNAs with premature stop codons. How does the cell distinguish between normal mRNAs and those with a premature stop?
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AU-rich elements (AREs) are cis-elements in mRNAs that regulate stability and decay. How is it possible that a single mRNA sequence element can serve to stabilize an mRNA in some cases and lead to its decay in other scenarios?
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Explain how the use of alternative promoters and alternative polyadenylation signals produces mRNAs with different 5' and 3' ends.
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Domanda del libro di testo
Consider the CT/CGRP example of alternative splicing show. Which different types of alternative splicing patterns are represented?
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Domanda del libro di testo
List three types of alternative splicing patterns and how they lead to the production of different protein isoforms.
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