Rise and Fall of SARS-CoV-2 Lineage A.27 in Germany.

Rise and Fall of SARS-CoV-2 Lineage A.27 in Germany.
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DOI:
10.3390/v13081491
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发表时间:
2021-07-29
期刊:
Viruses
影响因子:
--
通讯作者:
Hölzer M
Hölzer M
中科院分区:
其他
文献类型:
--
作者:
Calvignac-Spencer S;Budt M;Huska M;Richard H;Leipold L;Grabenhenrich L;Semmler T;von Kleist M;Kröger S;Wolff T;Hölzer M

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在这里,我们报告了2021年前几个月德国SARS-CoV-2谱系A.27的频率增加。截至2021年5月2日,基因组监测在德国发现了710个a .27基因组,其中绝大多数在德国单一州(巴登-符腾堡州,n = 572; 80.5%)的实验室中发现。巴登-符腾堡州位于与法国接壤的边境附近,直到2021年5月,大多数A.27序列都是从那里输入公共数据库的。根据巴登-符腾堡州实验室的测序,该谱系的首次出现可以追溯到21年1月初。此后,A.27的相对丰度在2月底前呈上升趋势,但此后呈下降趋势,而B.1.1.7的相对丰度在该区域呈上升趋势。a .27谱系显示出典型的voi /VOCs突变模式,包括Spike糖蛋白中氨基酸取代的积累。其中,L18F、L452R和N501Y位于n端- (NTD)或受体结合域(RBD)的表位区域,被认为导致免疫逃逸和更高的传播率。此外,A.27没有显示B系所有voci /VOCs典型的D614G突变。总体而言,应继续在国家和国际上监测A.27,尽管在德国观察到的趋势最初被B.1.1.7 (Alpha)所取代,而现在B.1.617.2 (Delta)正在上升。
Here, we report on the increasing frequency of the SARS-CoV-2 lineage A.27 in Germany during the first months of 2021. Genomic surveillance identified 710 A.27 genomes in Germany as of 2 May 2021, with a vast majority identified in laboratories from a single German state (Baden-Wuerttemberg, n = 572; 80.5%). Baden-Wuerttemberg is located near the border with France, from where most A.27 sequences were entered into public databases until May 2021. The first appearance of this lineage based on sequencing in a laboratory in Baden-Wuerttemberg can be dated to early January ’21. From then on, the relative abundance of A.27 increased until the end of February but has since declined—meanwhile, the abundance of B.1.1.7 increased in the region. The A.27 lineage shows a mutational pattern typical of VOIs/VOCs, including an accumulation of amino acid substitutions in the Spike glycoprotein. Among those, L18F, L452R and N501Y are located in the epitope regions of the N-terminal- (NTD) or receptor binding domain (RBD) and have been suggested to result in immune escape and higher transmissibility. In addition, A.27 does not show the D614G mutation typical for all VOIs/VOCs from the B lineage. Overall, A.27 should continue to be monitored nationally and internationally, even though the observed trend in Germany was initially displaced by B.1.1.7 (Alpha), while now B.1.617.2 (Delta) is on the rise.
SARS-COV-2峰值的氟蛋白切割会促进,但对于感染和细胞融合并不是必不可少的。
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