Related Experiment Video

Updated: Jul 11, 2026

Understanding the Development of Compensatory Pathways in a Mutant Malaria Parasite Harbouring Hypomorphic Allele of Plant-Like Kinases
09:13

Understanding the Development of Compensatory Pathways in a Mutant Malaria Parasite Harbouring Hypomorphic Allele of Plant-Like Kinases

Published on: November 22, 2024

Expression of the Pkd1 gene is momentously regulated by Sp1

Jeong Ok Jeon1, Kyung Hyun Yoo, Jong Hoon Park

  • 1Department of Biological Science, Sookmyung Women's University, Seoul, Korea.

Nephron. Experimental Nephrology
|September 25, 2007
PubMed

Insights

Autosomal dominant polycystic kidney disease (ADPKD) is linked to Pkd1 gene mutations. The Sp1-A binding site in the Pkd1 promoter is crucial for gene activation, impacting cyst formation in kidneys.

Area of Science:

  • Genetics
  • Molecular Biology
  • Nephrology

Background:

  • Autosomal dominant polycystic kidney disease (ADPKD) is a prevalent genetic disorder.
  • Mutations in the Pkd1 gene are a primary cause of ADPKD, leading to kidney cyst development.
  • Previous research identified functional regulatory sequences in the Pkd1 promoter via comparative genomics.

Purpose of the Study:

  • To investigate the transcriptional regulation of the Pkd1 gene.
  • To identify key regulatory elements within the Pkd1 promoter region.
  • To understand the role of Sp1 transcription factors in Pkd1 gene expression.

Main Methods:

  • Isolation and analysis of the Pkd1 promoter region.
  • Site-directed mutagenesis of Sp1-binding sites within a 300 bp promoter fragment (-127 to +157).
  • Electrophoretic mobility shift assay (EMSA) to detect transcription factor binding.
  • Luciferase reporter assays to assess promoter activity.

Main Results:

  • The Sp1-A site, located nearest to the ATG start codon, significantly contributes to Pkd1 gene activation.
  • EMSA confirmed that the Sp1 transcription factor binds to the Pkd1 promoter.
  • Mutational analysis indicated the importance of Sp1 sites in regulating Pkd1 expression.

Conclusions:

  • Two Sp1-binding sites are present in the proximal Pkd1 promoter region (-127 to +157).
  • Sp1 transcription factors play a critical role in the activation of the Pkd1 gene.
  • The Sp1-A site is particularly vital for Pkd1 gene expression, suggesting it as a key regulatory element.
Abstract

More Related Videos

Studying RNA Interactors of Protein Kinase RNA-Activated during the Mammalian Cell Cycle10:05

Studying RNA Interactors of Protein Kinase RNA-Activated during the Mammalian Cell Cycle

Published on: March 5, 2019

Related Concept Videos

Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
The JAK-STAT Signaling Pathway01:20

The JAK-STAT Signaling Pathway

Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as  SH2...
Cell Specific Gene Expression01:58

Cell Specific Gene Expression

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...
Pleiotropy01:33

Pleiotropy

Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
Regulation of Expression Occurs at Multiple Steps02:24

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 Occurs at Multiple Steps02:24

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...