Structural studies of cerebral cavernous malformations 2 (CCM2) reveal a folded helical domain at its C-terminus.

Structural studies of cerebral cavernous malformations 2 (CCM2) reveal a folded helical domain at its C-terminus.
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DOI:
10.1016/j.febslet.2012.12.011
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发表时间:
2013-01-31
期刊:
影响因子:
3.5
通讯作者:
Boggon TJ
Boggon TJ
中科院分区:
生物学3区
文献类型:
--
作者:
Fisher OS;Zhang R;Li X;Murphy JW;Demeler B;Boggon TJ

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脑海绵状血管瘤(CCM)是一种影响0.5%人口的神经血管发育不良。CCM2基因的突变与CCM的获得有关。我们在CCM2的c端发现了一个以前未被表征的结构域,并确定了其1.9 Å分辨率的晶体结构。由于该结构域在结构上与和声蛋白的n端结构域同源,我们将其命名为CCM2和声蛋白同源结构域或HHD。CCM2 HHD有两种构象,我们采用超离心分析来测试其寡聚化。此外,CCM2 HHD含有一个异常长的13个残基310螺旋。本研究首次提供了CCM2的结构表征。
Cerebral cavernous malformations (CCM) are neurovascular dysplasias affecting up to 0.5% of the population. Mutations in the CCM2 gene are associated with acquisition of CCM. We identify a previously uncharacterized domain at the C-terminus of CCM2 and determine its 1.9 Å resolution crystal structure. Because this domain is structurally homologous to the N-terminal domain of harmonin, we name it the CCM2 harmonin-homology domain or HHD. CCM2 HHD is observed in two conformations, and we employ analytical ultracentrifugation to test its oligomerization. Additionally, CCM2 HHD contains an unusually long 13-residue 310 helix. This study provides the first structural characterization of CCM2.
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