MRex
Can’t remember where I read it now, perhaps it was on the Christina Pagel thread on twitter or someone summarising Gupta lab results, but I think it is to early to make this conclusion
“ B.1.617.2 doesn't have the E484Q, so of the 3 it's least threatening. ”
It has been shown that there is no difference in binding and neutralisation between the .2 subtype and those with E484Q
I.e. E484Q is a bit of a red herring and unlikely to be contributing to the effect of the so called “Indian variant”
As an aside, this mutation is a change from an E (glutamic acid, positively charged) to a Q (glutamine, neutral). Whereas the mutation in some other VOCs was to a K (lysine, negatively charged).
The E484K was significant structurally as the charge difference is critical for neutralising antibody binding and has some effects on other sites in close proximity in the tertiary structure.
It wasn’t certain, but turns out a smaller change in charge from positive to neutral has not had such an effect.