Germline mutations in an intermediate chain dynein cause primary ciliary dyskinesia

被引:72
作者
Zariwala, M
Noone, PG
Sannuti, A
Minnix, S
Zhou, ZQ
Leigh, MW
Hazucha, M
Carson, JL
Knowles, MR
机构
[1] Univ N Carolina, Dept Med, Chapel Hill, NC USA
[2] Univ N Carolina, Dept Pediat, Chapel Hill, NC USA
关键词
D O I
10.1165/ajrcmb.25.5.4619
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
Primary ciliary dyskinesia (PCD) is a genetically heterogeneous, autosomal recessive disorder caused by abnormal ciliary ultrastructure and function, characterized clinically by otosino-pulmonary disease. Mutations in an intermediate chain dynein (DNAI1; IC78) have recently been described in PCD patients, with outer dynein arm (ODA) defects. The alms of the current study were to test for novel DNAI1 mutations in 13 PCD patients with ODA defects (from 7 unrelated families) and to assess genotype/phenotype correlations in patients and family members. A previously reported mutation (219+3insT) was detected in three PCD patients from two families. The opposite allele had the novel missense mutation G1874C (W568S) in both affected individuals from one family, and a nonsense mutation G1875A (W568X) in an affected individual from another family. The tryptophan at position 568 is a highly conserved residue in the WD-repeat region, and a mutation is predicted to lead to abnormal folding of the protein and loss of function. None of these mutations were found in 32 other PCD patients with miscellaneous ciliary defects. Mutations in DNAI1 are causative for PCD with ODA defects, and are likely the genetic origin of clinical disease in some PCD patients with ultrastructural defects in the ODA.
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页码:577 / 583
页数:7
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