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Related Concept Videos

Transcription01:10

Transcription

146.2K
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
146.2K
General Transcription Factors01:30

General Transcription Factors

5.1K
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...
5.1K
Cell Signaling in Plants01:25

Cell Signaling in Plants

5.6K
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
5.6K
Maintenance of the ES Cell State01:14

Maintenance of the ES Cell State

2.1K
The cells of the blastocyst inner cell mass only remain pluripotent for a short time. This state of pluripotency and self-renewal can be maintained in embryonic stem (ES) cell culture by adding specific chemicals or growth factors to ensure the cells can continue dividing and later differentiate into different cell types. In some cases, the cells are grown on a feeder layer of differentiated cells, which provides the growth factors and extracellular matrix components necessary for stem cell...
2.1K
Transcription Factors02:16

Transcription Factors

75.5K
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...
75.5K
Stem Cell Niche01:26

Stem Cell Niche

5.0K
The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...
5.0K

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Related Experiment Video

Updated: May 21, 2025

Isolation and Transcriptome Analysis of Plant Cell Types
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Root stem cell homeostasis in Arabidopsis involves cell-type specific transcription factor complexes.

Vivien I Strotmann1,2, Monica L García-Gómez3,4,5, Yvonne Stahl6,7,8

  • 1Institute for Developmental Genetics, Heinrich-Heine University, Universitätsstraße 1, 40225, Düsseldorf, Germany.

EMBO Reports
|March 20, 2025
PubMed
Summary

Arabidopsis root stem cell maintenance involves intricate transcription factor interactions. Protein complex profiles, influenced by PLT3, are key to regulating stem cell behavior and replenishment.

Keywords:
FRET-FLIMMathematical ModelingRoot Stem Cell NicheTranscription Factor Complexes

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Area of Science:

  • Plant Biology
  • Developmental Biology
  • Molecular Genetics

Background:

  • The root stem cell niche (SCN) in Arabidopsis thaliana is vital for plant growth.
  • Its maintenance relies on a complex regulatory network, but stem cell quiescence and replenishment mechanisms are not fully understood.

Purpose of the Study:

  • To investigate the interactions of transcription factors BRAVO, PLT3, and WOX5 in Arabidopsis SCN maintenance.
  • To elucidate their roles in regulating stem cell quiescence and replenishment.

Main Methods:

  • Analysis of Arabidopsis mutants for BRAVO, PLT3, and WOX5.
  • Fluorescence Resonance Energy Transfer Fluorescence Lifetime Imaging Microscopy (FRET-FLIM) to quantify protein-protein interactions (PPIs).
  • Development of novel analysis methods for PPIs and higher-order complex formation.
  • Integration of findings into a computational model.

Main Results:

  • Mutant analysis revealed combinatorial regulation of cell fates and divisions by BRAVO, PLT3, and WOX5 in the SCN.
  • FRET-FLIM quantified PPI affinities and higher-order complex formation among these transcription factors.
  • Computational modeling indicated that cell-type specific protein complex profiles, influenced by PLT3's prion-like domains, are crucial for SCN regulation.

Conclusions:

  • Specific protein complex signatures among BRAVO, PLT3, and WOX5 are critical for regulating the Arabidopsis root SCN.
  • These signatures may serve as indicators of cell specificity, enhancing the understanding of stem cell maintenance and replenishment.