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  • Title: Identification of eight new mutations in the GCK gene by DHPLC screening in a Spanish population.
    Author: Solera J, Arias P, Amiñoso C, González-Casado I, Garre P, Herranz L, Villarroel A, Cruz M, Jáñez M, Pallardo LF, Gracia R.
    Journal: Diabetes Res Clin Pract; 2009 Jul; 85(1):20-3. PubMed ID: 19410318.
    Abstract:
    Maturity onset diabetes of the young (MODY) is a genetically heterogeneous disorder characterized by autosomal dominant inheritance, altered function of pancreatic beta cells and early onset diabetes mellitus, usually before 25 years old. The prevalence of specific mutations of MODY genes differs considerably among different countries. In this study we analyzed 53 index cases from unrelated MODY families who are potential carriers of mutations in GCK gene. In addition, 122 relatives were also studied. We have identified eight new mutations in the GCK gene. One of them is a non-frameshift deletion involving Lysine 143. This amino acid is part of the conserved stretch of basic residues (KHKKL) which spans from residue 140 to 144. The non-frameshift deletion might implicate the affinity of GCK for GCKRP, and potentially the abnormal nuclear localization of GCK. Additional studies should be performed to confirm this possibility.
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