In vitro residual activities in 20 variants of phenylalanine hydroxylase and genotype-phenotype correlation in phenylketonuria patients. 2019

Xia Zhang, and Jun Ye, and Nan Shen, and Yue Tao, and Lianshu Han, and Wenjuan Qiu, and Huiwen Zhang, and Lili Liang, and Yanjie Fan, and Jianguo Wang, and Zhuwen Gong, and Yu Wang, and Guoling You, and Qihua Fu, and Xi Mo, and Xuefan Gu, and Yongguo Yu
Department of Pediatric Endocrinology/Genetics, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute for Pediatric Research, Shanghai 200092, China.

Phenylketonuria (PKU), caused by phenylalanine hydroxylase (PAH) gene variants, is a common autosomal inherited metabolic disease. So far, 1111 PAH variants have been revealed. The residual activity of the PAH variants is the key determinant of the metabolic phenotype and BH4 responsiveness in PKU patients. In this study, the spectrum of PAH variants in 1083 Chinese PKU patients was analyzed. Then 20 variants (p.L52F, p.R86P, p.L128P, p.L142P, p.D163N, p.C203G, p.E214G, p.F260L, p.M276T, p.L311R, p.P314A, p.L364F, p.Q375H, p.F382I, p.A395S, p.V412D, p.E108*, p.C203*, p.C284* and p.E353*) were expressed in COS-7 cells. The residual activities and protein expression levels were detected by isotope-dilution liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) and Western blotting, respectively. We compared the results of the phenotypic prediction based on APV and PAH activity respectively, and further explored the relationship between residual activity and phenotype in PKU patients. We reported 9 newly discovered PAH variants for the first time, thereby expanding the spectrum of PAH variants. Among the 20 variants in our assay, 8 variants showed mild impaired residual activities (48-92%) and approximately normal protein expression levels compared to the wild-type PAH. In contrast, 9 variants showed severely impaired residual activities (0-34%) and reduced protein expression. However, three variants (p.L52F, p.F260L and p.P314A) showed impaired residual activities (5%, 32% and 29%), although the proteins were well expressed. We assigned APV scores for 14 variants, in which the results of the phenotypic prediction were consistent for 12/14 (86%) variants based on APV and residual activity respectively, and the residual activity correctly predicted 17/22 (77%) of the patients. Our study helped to further understand the genotype-phenotype correlation in PKU patients.

UI MeSH Term Description Entries
D008297 Male Males
D010651 Phenylalanine Hydroxylase An enzyme of the oxidoreductase class that catalyzes the formation of L-TYROSINE, dihydrobiopterin, and water from L-PHENYLALANINE, tetrahydrobiopterin, and oxygen. Deficiency of this enzyme may cause PHENYLKETONURIAS and PHENYLKETONURIA, MATERNAL. EC 1.14.16.1. Phenylalanine 4-Hydroxylase,Phenylalanine 4-Monooxygenase,4-Hydroxylase, Phenylalanine,4-Monooxygenase, Phenylalanine,Hydroxylase, Phenylalanine,Phenylalanine 4 Hydroxylase,Phenylalanine 4 Monooxygenase
D010661 Phenylketonurias A group of autosomal recessive disorders marked by a deficiency of the hepatic enzyme PHENYLALANINE HYDROXYLASE or less frequently by reduced activity of DIHYDROPTERIDINE REDUCTASE (i.e., atypical phenylketonuria). Classical phenylketonuria is caused by a severe deficiency of phenylalanine hydroxylase and presents in infancy with developmental delay; SEIZURES; skin HYPOPIGMENTATION; ECZEMA; and demyelination in the central nervous system. (From Adams et al., Principles of Neurology, 6th ed, p952). Biopterin Deficiency,Dihydropteridine Reductase Deficiency Disease,Hyperphenylalaninemia, Non-Phenylketonuric,Phenylalanine Hydroxylase Deficiency Disease,BH4 Deficiency,DHPR Deficiency,Deficiency Disease, Dihydropteridine Reductase,Deficiency Disease, Phenylalanine Hydroxylase,Deficiency Disease, Phenylalanine Hydroxylase, Severe,Dihydropteridine Reductase Deficiency,Folling Disease,Folling's Disease,HPABH4C,Hyperphenylalaninaemia,Hyperphenylalaninemia Caused by a Defect in Biopterin Metabolism,Hyperphenylalaninemia, BH4-Deficient, C,Hyperphenylalaninemia, Tetrahydrobiopterin-Deficient, Due To DHPR Deficiency,Non-Phenylketonuric Hyperphenylalaninemia,Oligophrenia Phenylpyruvica,PAH Deficiency,PKU, Atypical,Phenylalanine Hydroxylase Deficiency,Phenylalanine Hydroxylase Deficiency Disease, Severe,Phenylketonuria,Phenylketonuria I,Phenylketonuria II,Phenylketonuria Type 2,Phenylketonuria, Atypical,Phenylketonuria, Classical,QDPR Deficiency,Quinoid Dihydropteridine Reductase Deficiency,Tetrahydrobiopterin Deficiency,Atypical PKU,Atypical Phenylketonuria,Biopterin Deficiencies,Classical Phenylketonuria,Deficiency, BH4,Deficiency, Biopterin,Deficiency, DHPR,Deficiency, Dihydropteridine Reductase,Deficiency, PAH,Deficiency, Phenylalanine Hydroxylase,Deficiency, QDPR,Deficiency, Tetrahydrobiopterin,Disease, Folling,Disease, Folling's,Hyperphenylalaninemia, Non Phenylketonuric,Non Phenylketonuric Hyperphenylalaninemia,Non-Phenylketonuric Hyperphenylalaninemias
D002522 Chlorocebus aethiops A species of CERCOPITHECUS containing three subspecies: C. tantalus, C. pygerythrus, and C. sabeus. They are found in the forests and savannah of Africa. The African green monkey is the natural host of SIMIAN IMMUNODEFICIENCY VIRUS and is used in AIDS research. African Green Monkey,Cercopithecus aethiops,Cercopithecus griseoviridis,Cercopithecus griseus,Cercopithecus pygerythrus,Cercopithecus sabeus,Cercopithecus tantalus,Chlorocebus cynosuros,Chlorocebus cynosurus,Chlorocebus pygerythrus,Green Monkey,Grivet Monkey,Lasiopyga weidholzi,Malbrouck,Malbrouck Monkey,Monkey, African Green,Monkey, Green,Monkey, Grivet,Monkey, Vervet,Savanah Monkey,Vervet Monkey,Savannah Monkey,African Green Monkey,Chlorocebus cynosuro,Green Monkey, African,Green Monkeys,Grivet Monkeys,Malbrouck Monkeys,Malbroucks,Monkey, Malbrouck,Monkey, Savanah,Monkey, Savannah,Savannah Monkeys,Vervet Monkeys
D002853 Chromatography, Liquid Chromatographic techniques in which the mobile phase is a liquid. Liquid Chromatography
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D014644 Genetic Variation Genotypic differences observed among individuals in a population. Genetic Diversity,Variation, Genetic,Diversity, Genetic,Diversities, Genetic,Genetic Diversities,Genetic Variations,Variations, Genetic
D015536 Down-Regulation A negative regulatory effect on physiological processes at the molecular, cellular, or systemic level. At the molecular level, the major regulatory sites include membrane receptors, genes (GENE EXPRESSION REGULATION), mRNAs (RNA, MESSENGER), and proteins. Receptor Down-Regulation,Down-Regulation (Physiology),Downregulation,Down Regulation,Down-Regulation, Receptor

Related Publications

Xia Zhang, and Jun Ye, and Nan Shen, and Yue Tao, and Lianshu Han, and Wenjuan Qiu, and Huiwen Zhang, and Lili Liang, and Yanjie Fan, and Jianguo Wang, and Zhuwen Gong, and Yu Wang, and Guoling You, and Qihua Fu, and Xi Mo, and Xuefan Gu, and Yongguo Yu
April 2023, Human genomics,
Xia Zhang, and Jun Ye, and Nan Shen, and Yue Tao, and Lianshu Han, and Wenjuan Qiu, and Huiwen Zhang, and Lili Liang, and Yanjie Fan, and Jianguo Wang, and Zhuwen Gong, and Yu Wang, and Guoling You, and Qihua Fu, and Xi Mo, and Xuefan Gu, and Yongguo Yu
September 2018, Molecular genetics and metabolism,
Xia Zhang, and Jun Ye, and Nan Shen, and Yue Tao, and Lianshu Han, and Wenjuan Qiu, and Huiwen Zhang, and Lili Liang, and Yanjie Fan, and Jianguo Wang, and Zhuwen Gong, and Yu Wang, and Guoling You, and Qihua Fu, and Xi Mo, and Xuefan Gu, and Yongguo Yu
November 2022, Molecular biology reports,
Xia Zhang, and Jun Ye, and Nan Shen, and Yue Tao, and Lianshu Han, and Wenjuan Qiu, and Huiwen Zhang, and Lili Liang, and Yanjie Fan, and Jianguo Wang, and Zhuwen Gong, and Yu Wang, and Guoling You, and Qihua Fu, and Xi Mo, and Xuefan Gu, and Yongguo Yu
February 2008, Zhonghua er ke za zhi = Chinese journal of pediatrics,
Xia Zhang, and Jun Ye, and Nan Shen, and Yue Tao, and Lianshu Han, and Wenjuan Qiu, and Huiwen Zhang, and Lili Liang, and Yanjie Fan, and Jianguo Wang, and Zhuwen Gong, and Yu Wang, and Guoling You, and Qihua Fu, and Xi Mo, and Xuefan Gu, and Yongguo Yu
June 2016, Zhonghua yi xue yi chuan xue za zhi = Zhonghua yixue yichuanxue zazhi = Chinese journal of medical genetics,
Xia Zhang, and Jun Ye, and Nan Shen, and Yue Tao, and Lianshu Han, and Wenjuan Qiu, and Huiwen Zhang, and Lili Liang, and Yanjie Fan, and Jianguo Wang, and Zhuwen Gong, and Yu Wang, and Guoling You, and Qihua Fu, and Xi Mo, and Xuefan Gu, and Yongguo Yu
March 2016, Molecular genetics and metabolism,
Xia Zhang, and Jun Ye, and Nan Shen, and Yue Tao, and Lianshu Han, and Wenjuan Qiu, and Huiwen Zhang, and Lili Liang, and Yanjie Fan, and Jianguo Wang, and Zhuwen Gong, and Yu Wang, and Guoling You, and Qihua Fu, and Xi Mo, and Xuefan Gu, and Yongguo Yu
December 2016, Gene,
Xia Zhang, and Jun Ye, and Nan Shen, and Yue Tao, and Lianshu Han, and Wenjuan Qiu, and Huiwen Zhang, and Lili Liang, and Yanjie Fan, and Jianguo Wang, and Zhuwen Gong, and Yu Wang, and Guoling You, and Qihua Fu, and Xi Mo, and Xuefan Gu, and Yongguo Yu
January 1981, Journal of inherited metabolic disease,
Xia Zhang, and Jun Ye, and Nan Shen, and Yue Tao, and Lianshu Han, and Wenjuan Qiu, and Huiwen Zhang, and Lili Liang, and Yanjie Fan, and Jianguo Wang, and Zhuwen Gong, and Yu Wang, and Guoling You, and Qihua Fu, and Xi Mo, and Xuefan Gu, and Yongguo Yu
January 2022, Frontiers in bioengineering and biotechnology,
Xia Zhang, and Jun Ye, and Nan Shen, and Yue Tao, and Lianshu Han, and Wenjuan Qiu, and Huiwen Zhang, and Lili Liang, and Yanjie Fan, and Jianguo Wang, and Zhuwen Gong, and Yu Wang, and Guoling You, and Qihua Fu, and Xi Mo, and Xuefan Gu, and Yongguo Yu
September 2000, European journal of human genetics : EJHG,
Copied contents to your clipboard!