Functional analysis of three genetic disorder related PITX2 mutants

Functional analysis of three genetic disorder related PITX2 mutants
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三种遗传性疾病相关PITX2突变体的功能分析

DOI:
10.1007/s11434-005-1374-4
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发表时间:
2006-01
期刊:
科学通报(英文版)
影响因子:
--
通讯作者:
LIANG Desheng
LIANG Desheng
中科院分区:
其他
文献类型:
--
作者:
XIA Kun & XIA Jiahui;WU Qianling;PAN Qian;ZHU Feizhou;DAI Heping;WANG Guo;LIU Xiaoping;LIANG Desheng

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相似文献

常染色体显性遗传疾病,角膜环状皮样瘤(RDC),虹膜发育不全(IH)和Axenoblast-Rieger综合征(ARS)是等位基因疾病,因为所有这三种疾病都可以由转录因子PITX 2的突变引起。在三种疾病表型中,ARS最严重,IH比ARS轻,RDC最轻。通过定点突变将在RDC(R62 H)、IH(R84 W)和ARS患者(T68 P)中鉴定的PITX 2同源结构域的错义突变引入PITX 2 cDNA中。PITX 2突变体蛋白在真核细胞中表达稳定,定位于细胞核。通过DNA结合位移和反式激活研究对这些突变体PITX 2蛋白的分析表明,R62 H在两项研究中具有最大的活性,R84 W仍然保留一定的功能,而T68 P被证明是无功能的。这些结果与先前的假设一致,即不同量的残留PITX 2突变体活性可以强调这些表型的严重性。
The autosome dominant disorders, ring dermoid of the cornea (RDC), iris hypolasia (IH) and Axenfeld-Rieger syndrome (ARS), are allelic disorders, as all three can result from mutations of the transcriptional factor PITX2. Among three disorder phenotypes, ARS is the most severe, IH is milder than ARS, and RDC is the mildest. Missense mutations of the PITX2 homeodomain identified in RDC (R62H), IH (R84W) and ARS patients (T68P) were introduced into PITX2 cDNA by site-directed mutagenesis. PITX2 mutant proteins expressed in eucaryotic cells were stable and localized to the nucleus. Analysis of these mutant PITX2 proteins by DNA-binding shift and transactivation studies demonstrated that the R62H had the most activity in both studies, and the R84W still retained somewhat functions, whereas the T68P proved to be non-functional. These results are consistent with previous hypothesis that varying amount of residual PITX2 mutant activity could underline the severity of these phenotypes.
DOI: 10.1093/emboj/18.12.3431
发表时间: 1999-06
期刊: The EMBO Journal
影响因子: --
作者:
J. Tremblay;Alexandre Marcil;Yves Gauthier;J. Drouin
通讯作者: J. Tremblay;Alexandre Marcil;Yves Gauthier;J. Drouin
DOI: 10.1007/s003359900970
发表时间: 1999-02-01
期刊: MAMMALIAN GENOME
影响因子: 2.5
作者:
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DOI: 10.1073/pnas.95.8.4573
发表时间: 1998-04-14
影响因子: 11.1
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发表时间: 2004-12
影响因子: 4
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DOI: 10.1016/s0303-7207(98)00026-4
发表时间: 1998-05-25
影响因子: 4.1
作者:
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