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General Transcription Factors

General Transcription Factors

Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...

Transcription Factors

Transcription Factors

Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...

Transcription Factors

Transcription Factors

Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...

Regulation of Expression Occurs at Multiple Steps

Regulation of Expression Occurs at Multiple Steps

Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...

Regulation of Expression at Multiple Steps

Regulation of Expression at Multiple Steps

The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...

What is Gene Expression?

What is Gene Expression?

A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then processed and...

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High Efficiency Differentiation of Human Pluripotent Stem Cells to Cardiomyocytes and Characterization by Flow Cytometry

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Troponin T isoforms and posttranscriptional modifications: Evolution, regulation and function.

Bin Wei¹, J-P Jin

¹Department of Physiology, Wayne State University School of Medicine, Detroit, MI 48201, USA.

Archives of Biochemistry and Biophysics

|October 23, 2010

Summary

Troponin T

Area of Science:

Muscle physiology and molecular biology
Biochemistry and structural biology

Background:

Troponin T is a key regulatory protein in striated muscle contraction.
It is part of the troponin complex, which controls actin-myosin interactions via calcium ions.
Understanding troponin T's structure-function relationship is crucial for muscle physiology.

Purpose of the Study:

To review the structure-function relationship of troponin T.
To summarize molecular evolution, gene regulation, RNA splicing, and posttranslational modifications of troponin T isoforms.
To discuss the physiological and pathophysiological significance of troponin T diversity.

Main Methods:

Literature review and synthesis of recent research.
Analysis of molecular evolution and gene regulation data.

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Examination of alternative RNA splicing and posttranslational modifications.

Main Results:

Troponin T exhibits significant structural diversity across skeletal and cardiac muscles.
Multiple regulatory mechanisms, including alternative splicing and posttranslational modifications, contribute to this diversity.
This diversity impacts striated muscle function and adaptation.

Conclusions:

Troponin T's structure-function relationship is complex and dynamically regulated.
Understanding troponin T isoforms and their regulation is vital for comprehending muscle adaptation in health and disease.
Further research into troponin T modifications can reveal new insights into muscle disorders.