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Related Concept Videos

What is Gene Expression?01:42

What is Gene Expression?

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Overview
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
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What is Gene Expression?01:36

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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...
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Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
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Chromatin Position Affects Gene Expression02:35

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Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences  access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area. 
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mRNA Stability and Gene Expression02:51

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The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
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In utero gene expression in the Slc39a8(neo/neo) knockdown mouse.

Jing Chen1, Marina Gálvez-Peralta2,3, Xiang Zhang2

  • 1Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, 45229, USA.

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Summary
This summary is machine-generated.

ZIP8 deficiency in mice causes severe anemia and developmental defects by disrupting zinc-dependent transcription factors crucial for blood formation. This highlights ZIP8

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Area of Science:

  • Developmental Biology
  • Molecular Genetics
  • Hematology

Background:

  • Slc39a8 gene encodes ZIP8, a vital divalent cation symporter.
  • ZIP8 facilitates zinc, manganese, and iron uptake in stem cells and adult tissues.
  • Slc39a8(neo/neo) mice exhibit severe growth defects, neonatal lethality, and anemia.

Purpose of the Study:

  • To investigate the molecular mechanisms underlying the phenotype of Slc39a8(neo/neo) mice.
  • To identify genes and pathways affected by ZIP8 deficiency during embryonic development.

Main Methods:

  • RNA-sequencing (RNA-seq) analysis of multiple embryonic and fetal tissues.
  • Bioinformatic analysis of differentially expressed genes, including Gene Ontology (GO) and KEGG pathway analysis.
  • Transcription factor (TF) binding site enrichment analysis using JASPAR and Pscan databases.

Main Results:

  • ZIP8 deficiency leads to dysregulated hematopoiesis and hypoxia-related gene expression.
  • Meta-analysis identified 29 unique genes associated with hematopoietic stem cell fate.
  • Enriched TF profiles revealed altered zinc-finger and GATA-interacting proteins, particularly in the yolk sac.

Conclusions:

  • Deficient ZIP8-mediated divalent cation transport impacts zinc-finger TFs like GATA proteins and their interactors (e.g., TAL1).
  • These molecular disruptions are strongly linked to the observed in utero dysmorphogenesis and anemia in Slc39a8(neo/neo) mice.
  • The study elucidates a critical role for ZIP8 in embryonic development and hematopoiesis via TF regulation.