A HYPERVARIABLE SEGMENT IN THE HUMAN DOPAMINE RECEPTOR D(4) (DRD4) GENE

被引:515
作者
LICHTER, JB
BARR, CL
KENNEDY, JL
VANTOL, HHM
KIDD, KK
LIVAK, KJ
机构
[1] DUPONT MERCK PHARMACEUT CO,EXPTL STN,POB 80328,WILMINGTON,DE 19880
[2] UNIV TORONTO,CLARKE INST PSYCHIAT,NEUROGENET & NEUROBIOL LAB,NEUROGENET SECT,TORONTO M5T 1R8,ONTARIO,CANADA
[3] YALE UNIV,SCH MED,DEPT GENET,NEW HAVEN,CT 06510
关键词
D O I
10.1093/hmg/2.6.767
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The human dopamine D4 receptor contains a novel polymorphism within the putative third cytoplasmic loop of the protein. The polymorphism is characterized by a varying number of direct imperfect 48-bp repeats in the gene. Pharmacological characterization has suggested that this receptor is the site through which the atypical neuroleptic clozapine exerts its antipsychotic action and that some polymorphic variants display different pharmacological properties. Further analysis of the repeat region using innovative technologies indicates that the alleles vary not only in the number of repeats (2-8 or 10 repeat units) but also in the sequence of the repeats and the order in which they appear. In 178 unrelated chromosomes we have identified 19 different repeats in 25 different haplotypes coding for 18 different predicted amino acid sequences, making this one of the most variable functional proteins currently described.
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页码:767 / 773
页数:7
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