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2020 ; 8
(ä): e9255
Nephropedia Template TP
gab.com Text
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English Wikipedia
Insights on early mutational events in SARS-CoV-2 virus reveal founder effects
across geographical regions
#MMPMID32509472
Farkas C
; Fuentes-Villalobos F
; Garrido JL
; Haigh J
; Barría MI
PeerJ
2020[]; 8
(ä): e9255
PMID32509472
show ga
Here we aim to describe early mutational events across samples from publicly
available SARS-CoV-2 sequences from the sequence read archive and GenBank
repositories. Up until 27 March 2020, we downloaded 50 illumina datasets, mostly
from China, USA (WA State) and Australia (VIC). A total of 30 datasets (60%)
contain at least a single founder mutation and most of the variants are missense
(over 63%). Five-point mutations with clonal (founder) effect were found in USA
next-generation sequencing samples. Sequencing samples from North America in
GenBank (22 April 2020) present this signature with up to 39% allele frequencies
among samples (n = 1,359). Australian variant signatures were more diverse than
USA samples, but still, clonal events were found in these samples. Mutations in
the helicase, encoded by the ORF1ab gene in SARS-CoV-2 were predominant, among
others, suggesting that these regions are actively evolving. Finally, we firmly
urge that primer sets for diagnosis be carefully designed, since rapidly
occurring variants would affect the performance of the reverse transcribed
quantitative PCR (RT-qPCR) based viral testing.