Direct assessment of the effect of the Gly380Arg achondroplasia mutation on FGFR3 dimerization using quantitative imaging FRET.

Direct assessment of the effect of the Gly380Arg achondroplasia mutation on FGFR3 dimerization using quantitative imaging FRET.
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DOI:
10.1371/journal.pone.0046678
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Hristova K
Hristova K
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Placone J;Hristova K

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FGFR3中的Gly380Arg突变是软骨发育不全(ACH)的遗传原因,ACH是人类侏儒症的最常见形式。已提出突变增加FGFR 3二聚化,但尚未比较野生型和突变型FGFR 3的二聚化倾向。在这里,我们使用定量成像FRET来表征来自HEK293T细胞的质膜衍生囊泡中野生型FGFR3和ACH突变体的二聚化。我们证明了由于ACH突变导致的FGFR 3二聚化的小的但统计学上显著的增加。数据与ACH突变引起结构变化的想法一致,该结构变化在不存在配体的情况下影响FGFR 3二聚体的稳定性和活性。
The Gly380Arg mutation in FGFR3 is the genetic cause for achondroplasia (ACH), the most common form of human dwarfism. The mutation has been proposed to increase FGFR3 dimerization, but the dimerization propensities of wild-type and mutant FGFR3 have not been compared. Here we use quantitative imaging FRET to characterize the dimerization of wild-type FGFR3 and the ACH mutant in plasma membrane-derived vesicles from HEK293T cells. We demonstrate a small, but statistically significant increase in FGFR3 dimerization due to the ACH mutation. The data are consistent with the idea that the ACH mutation causes a structural change which affects both the stability and the activity of FGFR3 dimers in the absence of ligand.
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