Crystallographic and cryoEM analyses reveal SARS-CoV-2 SL5 is a mobile T-shaped four-way junction with deep pockets

TABLE 3.

SL5 mRNA translation in vitro

mRNA variant Uncapped Capped
WT 1.00a 1.00a
A266G 0.35 ± 0.03 0.28 ± 0.02
SL5aGAAA 0.97 ± 0.10 0.82 ± 0.06
SL5bGAAA 1.12 ± 0.09 0.99 ± 0.11
G256U/A257U/A258U 0.94 ± 0.06 0.55 ± 0.09
ΔG174 0.93 ± 0.10 0.77 ± 0.08
ΔU211 1.12 ± 0.11 0.99 ± 0.12
Δ235A 0.92 ± 0.06 0.87 ± 0.04
A187C 0.86 ± 0.08 0.73 ± 0.07
C186A 1.02 ± 0.11 1.04 ± 0.10
G219U 1.02 ± 0.04 1.09 ± 0.05
G219C 1.12 ± 0.17 0.93 ± 0.27
U182C 1.06 ± 0.13 1.05 ± 0.30
A263G 0.94 ± 0.16 0.88 ± 0.14
U262G 1.24 ± 0.13 1.31 ± 0.07
A253G 1.12 ± 0.10 1.16 ± 0.19
A253G,U262C 1.09 ± 0.09 0.95 ± 0.04
G252A 1.30 ± 0.11 1.32 ± 0.04
C228U 1.20 ± 0.17 1.18 ± 0.18
G252A,C228U 1.05 ± 0.15 1.08 ± 0.04
G227A 1.17 ± 0.26 1.09 ± 0.15
C183U 1.25 ± 0.12 1.21 ± 0.10
G227A,C183U 1.10 ± 0.12 1.03 ± 0.17
  • (SL5) Stem–loop 5, (SD) standard deviation, (WT) wild type.

  • aValues for uncapped mRNAs were normalized by the WT uncapped mRNA, and values for capped mRNAs were normalized by the WT capped mRNA. For all values, mean ± SD, n = 6.

This Article

  1. RNA 31: 949-960