Mutations of factor VIII cleavage sites in hemophilia A.

Mutations of factor VIII cleavage sites in hemophilia A.
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A 型血友病中因子 VIII 裂解位点的突变。

DOI:
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发表时间:
1988
期刊:
影响因子:
20.3
通讯作者:
E. Tuddenham
E. Tuddenham
中科院分区:
医学1区
文献类型:
--
作者:
J. Gitschier;S. Kogan;B. Levinson;E. Tuddenham

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A 型血友病是由凝血因子 VIII 缺陷引起的,凝血因子 VIII 是一种在激活和失活过程中经历广泛蛋白水解的蛋白质。为了确定某些血友病病例是否是由重要切割位点的突变引起的,我们通过两步过程筛选了患者 DNA 样本中这些位点的突变。通过重复轮次引物引导的 DNA 合成,从基因组 DNA 中扩增出感兴趣的区域。然后使用寡核苷酸探针通过判别杂交来筛选扩增的DNA的突变。在对 215 名患者的调查中发现了两个切割位点突变。在一名严重血友病患者中发现了第 336 位氨基酸的活化蛋白 C 裂解位点的无义突变。在另一位严重受影响的患者中,错义突变导致凝血酶激活位点氨基酸 1689 处的精氨酸被半胱氨酸取代。这种缺陷与无法检测到的因子 VIII 活性相关,但与因子 VIII 抗原的正常水平有关。该患者的严重血友病是散发性的;对母亲的分析表明,突变起源于她的配子或胚胎发生过程中。结果表明,这种方法可用于识别已知对功能重要的分子区域中的因子 VIII 基因突变。
Hemophilia A is caused by a defect in coagulation factor VIII, a protein that undergoes extensive proteolysis during its activation and inactivation. To determine whether some cases of hemophilia are caused by mutations in important cleavage sites, we screened patient DNA samples for mutations in these sites by a two-step process. Regions of interest were amplified from genomic DNA by repeated rounds of primer-directed DNA synthesis. The amplified DNAs were then screened for mutations by discriminant hybridization using oligonucleotide probes. Two cleavage site mutations were found in a survey of 215 patients. A nonsense mutation in the activated protein C cleavage site at amino acid 336 was discovered in a patient with severe hemophilia. In another severely affected patient, a mis-sense mutation results in a substitution of cysteine for arginine in the thrombin activation site at amino acid 1689. This defect is associated with no detectable factor VIII activity, but with normal levels of factor VIII antigen. The severe hemophilia in this patient was sporadic; analysis of the mother suggested that the mutation originated in her gametes or during her embryogenesis. The results demonstrate that this approach can be used to identify factor VIII gene mutations in regions of the molecule known to be important for function.
纯化的因子 viii 促凝血蛋白的凝血酶蛋白水解:激活与特定多肽生成的相关性。
DOI: --
发表时间: 1983
期刊: Blood
影响因子: 20.3
作者:
Fulcher,CA;Roberts,JR;Zimmerman,TS
通讯作者: Zimmerman,TS
因子VIII轻链残基Val1670-Glu1684内的免疫原性区域诱导抑制因子VIII与冯维勒布兰德因子结合的抗体。
DOI: --
发表时间: 1988
期刊: The Journal of biological chemistry
影响因子: --
作者:
Foster,PA;Fulcher,CA;Houghten,RA;Zimmerman,TS
通讯作者: Zimmerman,TS
抗血友病因子(因子 VIII)的凝血酶激活的蛋白水解要求。
DOI: 10.1073/pnas.85.8.2429
发表时间: 1988
影响因子: 11.1
作者:
Pittman,DD;Kaufman,RJ
通讯作者: Kaufman,RJ
因子 VIII 抑制抗体表位定位于因子 VIII 重链残基 338 和 362 之间的区域。
DOI: 10.1073/pnas.85.9.3165
发表时间: 1988
影响因子: 11.1
作者:
Ware,J;Toomey,JR;Stafford,DW
通讯作者: Stafford,DW