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Ichida, K. et al.

Ichida, Ibrahim Aydin, Hosoyamada, Kalkanoglu, Dursun, Ohno, Coskun, Tokatli, Shibasaki, Hosoya,

A Turkish case with molybdenum cofactor deficiency.

Molybdenum cofactor deficiency ( MIM 252150) is a rare progressive neurodegenerative disorder with about 100 cases reported worldwide. We have identified a male with molybdenum cofactor deficiency and analyzed the molybdenum cofactor synthesis (MOCS)1 gene, MOCS2 gene, MOCS3 gene and GEPH gene. We homozygously identified the CGA insertion after A666 of the MOCS1 gene which produces arginine insertion at codon 222 of MOCS1A. The parents, his brother and his sister who did not have any symptoms were heterozygous for the same mutation. This region was highly conserved in various species. The N-terminal part of MOCS1 a protein is suggested to form the central core of the protein and be composed of an incomplete [(alpha/beta)6] triosephosphate isomerase ( TIM) barrel with a lateral opening that is covered by the C-terminal part of the protein. The insertion is located in the loop connecting the fifth beta strand to the sixth alpha helices of the TIM barrel structure. This arginine insertion would induce the conformation change and the lack of the activity.[1]

References

A Turkish case with molybdenum cofactor deficiency. Ichida, K., Ibrahim Aydin, H., Hosoyamada, M., Kalkanoglu, H.S., Dursun, A., Ohno, I., Coskun, T., Tokatli, A., Shibasaki, T., Hosoya, T. Nucleosides Nucleotides Nucleic Acids (2006) [Pubmed]

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