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Competing endogenous RNAs act as molecular 'sponges.' What does this mean, and what do they compete with?
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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 19
Klug 12th EditionCh. 18 - Post-transcriptional Regulation in EukaryotesProblema 19Capitolo 18, Problema 19
How and why are eukaryotic mRNAs transported and localized to discrete regions of the cell?
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Understand that eukaryotic mRNAs are transported and localized within the cell to ensure that proteins are synthesized at specific locations where they are needed, which is crucial for cell function and development.
Recognize that mRNA localization involves three main steps: (1) recognition of the mRNA by RNA-binding proteins through specific sequences called 'zip codes' in the mRNA, (2) transport of the mRNA-protein complex along the cytoskeleton (microtubules or actin filaments) using motor proteins, and (3) anchoring of the mRNA at the target site to allow localized translation.
Explore the role of RNA-binding proteins that bind to cis-acting elements within the mRNA, which serve as signals for transport and localization, ensuring specificity in the destination of each mRNA molecule.
Examine how motor proteins such as kinesins, dyneins, or myosins interact with the cytoskeleton to physically move the mRNA complexes to discrete cellular regions, facilitating spatial regulation of gene expression.
Consider the biological significance of mRNA localization, including its role in cell polarity, embryonic development, synaptic plasticity in neurons, and efficient protein targeting, which together contribute to cellular organization and function.
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mRNA Transport Mechanisms in Eukaryotic Cells
Eukaryotic mRNAs are actively transported from the nucleus to specific cytoplasmic locations via motor proteins along the cytoskeleton. This targeted movement ensures that proteins are synthesized near their site of function, enhancing cellular efficiency and spatial regulation.
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09:16
Eukaryotic Transcription
mRNA Localization Signals and Binding Proteins
Specific sequences within mRNAs, called localization signals or zip codes, are recognized by RNA-binding proteins. These complexes guide the mRNA to distinct cellular regions, enabling precise spatial control of gene expression.
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05:05Proteins
Functional Importance of mRNA Localization
Localized mRNA translation allows cells to rapidly respond to environmental cues and maintain polarity by producing proteins at precise sites. This is crucial in processes like embryonic development, synaptic plasticity, and cell migration.
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08:26Functional Genomics
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