Homozygous L-SIGN (CLEC4M) plays a protective role in SARS coronavirus infection.

Homozygous L-SIGN (CLEC4M) plays a protective role in SARS coronavirus infection.
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DOI:
10.1038/ng1698
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发表时间:
2006-01
期刊:
影响因子:
30.8
通讯作者:
Lin CL
Lin CL
中科院分区:
生物学1区
文献类型:
--
作者:
Chan VS;Chan KY;Chen Y;Poon LL;Cheung AN;Zheng B;Chan KH;Mak W;Ngan HY;Xu X;Screaton G;Tam PK;Austyn JM;Chan LC;Yip SP;Peiris M;Khoo US;Lin CL

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严重急性呼吸综合征(SARS)是由一种以前未描述的冠状病毒(CoV)感染引起的。L-SIGN由CLEC 4 M(也称为CD 209 L)编码,是一种SARS冠状病毒结合受体,其胞外颈区由外显子4中的串联重复结构域编码,具有多态性。我们的遗传风险关联研究表明,CLEC 4 M串联重复序列纯合子个体对SARS感染的易感性较低。L-SIGN在非SARS和SARS-CoV感染的肺中都有表达。与L-SIGN杂合子细胞相比,L-SIGN纯合子细胞显示出更高的SARS-CoV结合能力、更高的蛋白酶体依赖性病毒降解能力和更低的反式感染能力。因此,L-SIGN的纯合性在SARS感染中起保护作用。本文的在线版本(doi:10.1038/ng 1698)包含补充材料,可供授权用户使用。
Severe acute respiratory syndrome (SARS) is caused by infection of a previously undescribed coronavirus (CoV). L-SIGN, encoded by CLEC4M (also known as CD209L), is a SARS-CoV binding receptor that has polymorphism in its extracellular neck region encoded by the tandem repeat domain in exon 4. Our genetic risk association study shows that individuals homozygous for CLEC4M tandem repeats are less susceptible to SARS infection. L-SIGN is expressed in both non-SARS and SARS-CoV–infected lung. Compared with cells heterozygous for L-SIGN, cells homozygous for L-SIGN show higher binding capacity for SARS-CoV, higher proteasome-dependent viral degradation and a lower capacity for trans infection. Thus, homozygosity for L-SIGN plays a protective role during SARS infection. The online version of this article (doi:10.1038/ng1698) contains supplementary material, which is available to authorized users.
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