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Related Experiment Videos

A Turkish case with molybdenum cofactor deficiency.

K Ichida1, H Ibrahim Aydin, M Hosoyamada

  • 1Division of Kidney and Hypertension, Jikei University School of Medicine, Tokyo, Japan. ichida@jikei.ac.jp

Nucleosides, Nucleotides & Nucleic Acids
|October 27, 2006
PubMed
Summary
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Molybdenum cofactor deficiency, a rare neurodegenerative disorder, is linked to a specific MOCS1 gene mutation. This CGA insertion causes an arginine alteration, leading to protein dysfunction and disease.

Area of Science:

  • Genetics
  • Neuroscience
  • Biochemistry

Background:

  • Molybdenum cofactor deficiency (MIM 252150) is a rare, progressive neurodegenerative disorder with approximately 100 reported cases globally.
  • Genetic analysis of molybdenum cofactor synthesis (MOCS) genes (MOCS1, MOCS2, MOCS3) and GEPH is crucial for understanding disease mechanisms.

Observation:

  • A male patient with molybdenum cofactor deficiency was identified.
  • Analysis revealed a homozygous CGA insertion after A666 in the MOCS1 gene, resulting in an arginine insertion at codon 222 of MOCS1A.
  • Family members without symptoms were heterozygous for this mutation, indicating its recessive inheritance pattern.

Findings:

  • The identified mutation, a CGA insertion leading to arginine at MOCS1A codon 222, was located in a highly conserved region.

Related Experiment Videos

  • Structural analysis suggests the insertion disrupts the triosephosphate isomerase (TIM) barrel domain of the MOCS1 protein.
  • This arginine insertion is predicted to induce conformational changes, resulting in a loss of protein activity.

    • Implications:

    • This finding elucidates a specific genetic cause for molybdenum cofactor deficiency.
    • Understanding the structural impact of the mutation provides insights into MOCS1 protein function.
    • Further research can explore targeted therapeutic strategies for this rare neurodegenerative disorder.