Part 2. Which lane or lanes on the gel could be the result of Mutation B? lane 1 lane 2 lane 3 lane 4 lane 5

Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN:9781305251052
Author:Michael Cummings
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Chapter9: Gene Expression And Gene Regulation
Section: Chapter Questions
Problem 10QP: The pre-mRNA transcript and protein made by several mutant genes were examined. The results are...
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Part 2. Which lane or lanes on the gel could be the result of Mutation B?
lane 1
lane 2
lane 3
lane 4
lane 5
Transcribed Image Text:Part 2. Which lane or lanes on the gel could be the result of Mutation B? lane 1 lane 2 lane 3 lane 4 lane 5
The diagram shown represents the coding strand of the myosin gene. Mutations in myosin can lead to muscle defects during development. Using what you know about how mutations can
affect transcriptional and post-transcriptional regulation, match the results shown on the Northern (mature mRNA) to the mutations shown. The N lane shows the size and amount expected
for non-mutated myosin mRNA. All samples were loaded at the top (-) side of the gel.
Part 1. Which lane or lanes on the gel could be the result of mutation A?
--4
ТАТАА
AUG
UAA
Only known
regulatory
region
TSS
Mutation B:
Mutation C.
A: 5-base
20 nucleotides
3 nucleotides
deletion
deleted
changed
N
1
2
3
4 5
Transcribed Image Text:The diagram shown represents the coding strand of the myosin gene. Mutations in myosin can lead to muscle defects during development. Using what you know about how mutations can affect transcriptional and post-transcriptional regulation, match the results shown on the Northern (mature mRNA) to the mutations shown. The N lane shows the size and amount expected for non-mutated myosin mRNA. All samples were loaded at the top (-) side of the gel. Part 1. Which lane or lanes on the gel could be the result of mutation A? --4 ТАТАА AUG UAA Only known regulatory region TSS Mutation B: Mutation C. A: 5-base 20 nucleotides 3 nucleotides deletion deleted changed N 1 2 3 4 5
Expert Solution
Step 1: Myosin and post transcriptional regulation

Myosin, a motor protein primarily involved in muscle contraction, undergoes alterations in its structure due to minor genetic mutations within its gene.

These mutations can affect its interaction with actin, thereby modifying the molecular mechanism underlying muscle contraction. Myosin serves as the primary molecular motor driving muscle contraction and cellular motility based on actin.

Post-transcriptional regulation regulates gene expression at the RNA level, occurring after RNA polymerase binds to the gene promoter and initiates nucleotide synthesis.

Numerous mutations in genes encoding RNA-binding proteins lead to human diseases, as these proteins play crucial roles in regulating gene expression from mRNA processing to eventual decay in the cytoplasm.

Given their widespread expression and vital functions in gene expression, alterations in these RNA-binding proteins are often associated with tissue-specific diseases.

Disease-associated mutations affect various post-transcriptional processing steps, resulting in diverse disease phenotypes across specific tissues.

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