Identification of a novel pathogenic mutation in PDHA1 gene for pyruvate dehydrogenase complex deficiency
WU Mo-Ling1, LIU Li1, MAO Xiao-Jian1, PENG Min-Zhi1, LIU Hong-Sheng2, SHENG Hui-Ying1, CAI Yan-Na1, MEI Hui-Fen1, FAN Chun1, HUANG Yong-Lan1, LI Xiu-Zhen1, CHENG Jing1
Department of Genetics and Endocrinology, Guangzhou Children and Women's Medical Center, Guangzhou 510623, China
Abstract Objective To study the molecular genetic mechanism and genetic diagnosis of pyruvate dehydrogenase complex deficiency (PHD), and to provide a basis for genetic counseling and prenatal genetic diagnosis of PHD. Methods Polymerase chain reaction (PCR) was performed to amplify the 11 exons and exon junction of the PDHA1 gene from a child who was diagnosed with PHD based on clinical characteristics and laboratory examination results. The PCR products were sequenced to determine the mutation. An analysis of amino acid conservation and prediction of protein secondary and tertiary structure were performed using bioinformatic approaches to identify the pathogenicity of the novel mutation. Results One novel duplication mutation, c.1111_1158dup48bp, was found in the exon 11 of the PDHA1 gene of the patient. No c.1111_1158dup48bp mutation was detected in the sequencing results from 50 normal controls. The results of protein secondary and tertiary structure prediction showed that the novel mutation c.1111 _1158dup48bp led to the duplication of 16 amino acids residues, serine371 to phenylalanine386, which induced a substantial change in protein secondary and tertiary structure. The conformational change was not detected in the normal controls. Conclusions The novel duplication mutation c.1111_1158dup48bp in the PDHA1 gene is not due to gene polymorphisms but a possible novel pathogenic mutation for PHD.
About author:: 10.7499/j.issn.1008-8830.2015.08.003
Cite this article:
WU Mo-Ling,LIU Li,MAO Xiao-Jian et al. Identification of a novel pathogenic mutation in PDHA1 gene for pyruvate dehydrogenase complex deficiency[J]. CJCP, 2015, 17(8): 775-779.
WU Mo-Ling,LIU Li,MAO Xiao-Jian et al. Identification of a novel pathogenic mutation in PDHA1 gene for pyruvate dehydrogenase complex deficiency[J]. CJCP, 2015, 17(8): 775-779.
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