Related Experiment Video
Updated: Jun 26, 2026
08:31
Biosensor-based High Throughput Biopanning and Bioinformatics Analysis Strategy for the Global Validation of Drug-protein Interactions
Published on: December 1, 2020
XPG: its products and biological roles
1Department of Pharmacological Sciences and Chemistry, Stony Brook University, Stony Brook, NY 11974-3400, USA. orlando@pharm.stonybrook.edu
Advances in Experimental Medicine and Biology
|February 3, 2009
Summary
Xeroderma pigmentosum complementation group G (XP-G) patients exhibit varied phenotypes. Mutations in the XPG gene cause DNA repair defects, leading to typical XP or a severe XP/Cockayne Syndrome complex.
Area of Science:
- Genetics
- Molecular Biology
- Biochemistry
Background:
- Xeroderma pigmentosum (XP) is a rare genetic disorder characterized by extreme sensitivity to sunlight.
- XP complementation group G (XP-G) involves mutations in the XPG gene, crucial for DNA repair.
- XP-G patients present with either typical XP or a more severe XP/Cockayne Syndrome (XP/CS) complex.
Purpose of the Study:
- To review the discovery and function of the XPG gene.
- To explore the biochemical properties of the XPG protein.
- To summarize molecular defects in XP-G patients and relevant mouse models.
Main Methods:
- Literature review of XPG gene discovery and function.
- Analysis of biochemical properties of XPG protein.
- Compilation of molecular data from XP-G patients and mouse models.
Main Results:
- XPG protein has structural and catalytic roles in DNA nucleotide excision repair.
- Mutations in XPG lead to distinct XP phenotypes, ranging from mild to severe XP/CS complex.
- XP/CS complex is associated with DNA repair and mild transcription defects.
Conclusions:
- XPG gene mutations underlie diverse clinical presentations in XP patients.
- Understanding XPG's dual role in repair and transcription is key to XP/CS pathogenesis.
- Further research into XPG function can inform therapeutic strategies for DNA repair disorders.
Related Concept Videos
01:26Signal Transduction: Overview
Cells respond to many types of information, often through receptor proteins positioned on the membrane. They respond to chemical signals, such as hormones, neurotransmitters, and other signaling molecules, initiating a series of molecular reactions to produce an appropriate response. This is called signal transduction. Cells also coordinate different responses elicited by the same signaling molecule via mediators, allowing molecular cross-talk.
Typically, signal transduction involves three...
Typically, signal transduction involves three...
01:31Transducer Mechanism: Nuclear Receptors
Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
01:28Role of Hematopoietic Growth Factors
Hematopoietic growth factors are molecules that regulate the differentiation rate of hematopoietic stem cells (HSCs). Erythropoietin (EPO), primarily produced by the kidneys, plays a crucial role in erythrocyte production. When oxygen levels in the blood are low, EPO is released into the bloodstream, reaching the bone marrow, where it stimulates HSCs to differentiate and mature into erythrocytes, which are vital for oxygen transport.
Thrombopoietin (TPO), mainly released by the liver,...
Thrombopoietin (TPO), mainly released by the liver,...
01:27Transducer Mechanism: Enzyme-Linked Receptors
Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
Major types that are helpful drug targets include:
01:28Biopharmaceutics and Pharmacokinetics: Overview
Understanding drugs, drug products, and their performance in pharmaceutical science is pivotal. Drugs, whether simple molecules or complex compounds, are designed to interact with the body's biological systems to diagnose, treat, or prevent diseases. Drug products include various delivery systems such as tablets, capsules, injections, and inhalers. The performance of these drug products is gauged by their ability to deliver the active ingredient to the desired site of action at the appropriate...
01:28Drug Products: Biologics, Biosimilars and Interchangeables
Biologics, derived from living sources such as humans, animals, or microorganisms, represent a significant category of pharmaceuticals. These complex molecules, developed through advanced biotechnological methods or purified from natural sources, include essential medical treatments like insulin and growth hormones. The complexity of biologics arises from their large molecular structures and the intricate processes required for their production, making them distinct from conventional...