An N-terminal G11A mutation in HOXD13 causes synpolydactyly and interferes with Gli3R function during limb pre-patterning

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Abstract

Synpolydactyly (SPD) is a distal limb anomaly characterized by incomplete digit separation and the presence of supernumerary digits in the syndactylous web. This phenotype has been associated with mutations in the homeodomain or polyalanine tract of the HOXD13 gene. We identified a novel mutation (G11A) in HOXD13 that is located outside the previously known domains and affects the intracellular half life of the protein. Misexpression of HOXD13(G11A) in the developing chick limb phenocopied the human SPD phenotype. Finally, we demonstrated through in vitro studies that this mutation has a destabilizing effect on GLI3R uncovering an unappreciated mechanism by which HOXD13 determines the patterning of the limb. © The Author 2012. Published by Oxford University Press. All rights reserved.

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Brison, N., Debeer, P., Fantini, S., Oley, C., Zappavigna, V., Luyten, F. P., & Tylzanowski, P. (2012). An N-terminal G11A mutation in HOXD13 causes synpolydactyly and interferes with Gli3R function during limb pre-patterning. Human Molecular Genetics, 21(11), 2464–2475. https://doi.org/10.1093/hmg/dds060

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