Structural characterization of the fusion core in syncytin, envelope protein of human endogenous retrovirus family W.

Structural characterization of the fusion core in syncytin, envelope protein of human endogenous retrovirus family W.
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融合核的结构表征合成蛋白,人内源性病毒家族的包膜蛋白W。

DOI:
10.1016/j.bbrc.2005.04.032
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发表时间:
2005-06-17
影响因子:
3.1
通讯作者:
Xiao G
Xiao G
中科院分区:
生物学4区
文献类型:
--
作者:
Gong R;Peng X;Kang S;Feng H;Huang J;Zhang W;Lin D;Tien P;Xiao G

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合胞素是一种捕获的逆转录病毒包膜蛋白,可能参与母胎界面滋养层细胞融合产生的胎盘合胞体滋养层的形成。我们发现合胞素和I型病毒包膜蛋白具有相似的结构特征,特别是在N-和C-末端七肽重复序列(NHR和NH3)区域。我们将合胞素中NHR(41 aa)和NHR(34 aa)的预测区域表达为天然单链(命名为2-helix protein),2-helix protein以三聚体形式存在,高度α-螺旋,热稳定,在低pH下变性,NHR和NHR可以形成抗蛋白酶复合物。通过分子对接构建的复合物结构表明,NHR和NHR以反平行的方式缔合。总的来说,2-螺旋蛋白可以形成热稳定的卷曲螺旋三聚体。合胞素的融合核心结构首先在内源性逆转录病毒中得到证实。这些结果支持了合胞素如何介导胎盘形态发生中细胞滋养层细胞融合的解释。
Syncytin is a captive retroviral envelope protein, possibly involved in the formation of the placental syncytiotrophoblast layer generated by trophoblast cell fusion at the maternal–fetal interface. We found that syncytin and type I viral envelope proteins shared similar structural profiling, especially in the regions of N- and C-terminal heptad repeats (NHR and CHR). We expressed the predicted regions of NHR (41 aa) and CHR (34 aa) in syncytin as a native single chain (named 2-helix protein) to characterize it. 2-helix protein exists as a trimer and is highly α-helix, thermo-stable, and denatured by low pH. NHR and CHR could form a protease-resistant complex. The complex structure built by the molecular docking demonstrated that NHR and CHR associated in an antiparallel manner. Overall, the 2-helix protein could form a thermo-stable coiled coil trimer. The fusion core structure of syncytin was first demonstrated in endogenous retrovirus. These results support the explanation how syncytin mediates cytotrophoblast cell fusion involved in placental morphogenesis.
DOI: 10.1095/biolreprod.104.033340
发表时间: 2004-12-01
影响因子: 3.6
作者:
Chang, C;Chen, PT;Chen, H
通讯作者: Chen, H
DOI: 10.1073/pnas.0305763101
发表时间: 2004-02-10
影响因子: 11.1
作者:
Mallet, F;Bouton, O;Mandrand, B
通讯作者: Mandrand, B
DOI: 10.1016/0092-8674(93)90260-w
发表时间: 1993-05-21
期刊: CELL
影响因子: 64.5
作者:
CARR, CM;KIM, PS
通讯作者: KIM, PS
DOI: 10.1128/jvi.69.6.3308-3314.1995
发表时间: 1995-06-01
影响因子: 5.4
作者:
SCHAAL, H;KLEIN, M;SCHEID, A
通讯作者: SCHEID, A
DOI: 10.1002/prot.10389
发表时间: 2003-07-01
影响因子: 2.9
作者:
Chen, R;Li, L;Weng, ZP
通讯作者: Weng, ZP