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The pharmacogenetics of drug transporters is increasingly recognized as a critical factor influencing interindividual variability in drug absorption, distribution, and elimination. These membrane-bound proteins regulate drugs' movement across cellular barriers by actively pumping them out (efflux) or facilitating their uptake (influx). Among the major transporter families, ATP-binding cassette (ABC) and solute carrier (SLC) transporters play particularly prominent roles. Genetic polymorphisms...
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The human genome is over 99.9% identical between individuals, yet genetic differences exist at millions of bases. The human genome contains approximately 3 million variant positions per individual, many of which are heterozygous, contributing to genetic diversity and individual traits. Genetic variations include single-nucleotide polymorphisms (SNPs), insertions, deletions, and copy number variations (CNVs).SNPs, the most common variation, involve single-base changes in DNA. These can be...
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In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila
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Sequence variation database for the Wilson disease copper transporter, ATP7B.

Susan M Kenney1, Diane W Cox

  • 1Department of Medical Genetics, University of Alberta, Edmonton, Alberta, Canada.

Human Mutation
|August 8, 2007
PubMed
Summary

Wilson disease, a treatable genetic disorder of copper transport, is caused by mutations in the ATP7B gene. A new database catalogs over 518 variants to aid in diagnosis and understanding of this condition.

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Area of Science:

  • Genetics
  • Biochemistry
  • Medical Research

Background:

  • Wilson disease is a genetic disorder affecting copper transport, leading to toxic accumulation in organs like the liver, kidneys, and brain.
  • It is an autosomal recessive condition with a wide range of clinical presentations and variable age of onset, often leading to delayed diagnosis.
  • The underlying genetic defect is in the ATP7B gene, which encodes a copper-transporting P-type ATPase.

Purpose of the Study:

  • To describe a newly developed database for reporting mutations in the ATP7B gene.
  • To provide a comprehensive resource for studying population variations and ATP7B transporter function.
  • To assist in identifying disease-causing and non-disease-causing sequence variants in Wilson disease.

Main Methods:

  • Development of a database to collect and report mutations in the ATP7B gene.
  • Inclusion of over 518 variants from global populations.
  • Categorization of variants into probable disease-causing and possible normal types.

Main Results:

  • The database contains over 518 ATP7B variants, with 379 identified as probable disease-causing.
  • The variants are sourced from diverse populations worldwide.
  • The database serves as a valuable resource for genetic variation studies.

Conclusions:

  • The developed database is a significant resource for Wilson disease research.
  • It facilitates the identification and characterization of ATP7B mutations.
  • This resource aids in understanding population genetics and improving diagnostic accuracy for Wilson disease.