2020-08-19 REL RCSB RCSB RCSB 2020-01-05 2020-01-29 2020-08-12 2020-08-19 Bill & Melinda Gates Foundation OPP1115782 United States Ward AB Antanasijevic A Ueda G Antanasijevic A Fallas JA Sheffler W Copps J Ellis D Hutchinson GB Moyer A Yasmeen A Tsybovsky Y Park YJ Bick MJ Sankaran B Gillespie RA Brouwer PJ Zwart PH Veesler D Kanekiyo M Graham BS Sanders RW Moore JP Klasse PJ Ward AB King NP Baker D Elife US 9 2020 32748788 doi:10.7554/eLife.57659 2050-084X EMD-21165 associated EM volume De novo designed octahedral nanoparticle O43_dn18 De novo designed octahedral nanoparticle O43_dn18 0 1 2

Negative Stain EM Map

synthetic construct Escherichia coli BL21(DE3) pET28b 0.88 O43_dn18B synthetic construct Escherichia coli BL21(DE3) LEVO MGEEAELAYLLGELAYKLGEYRIAIRAYRIALKRDPNNAEAWYNLGNAYYKQGDYDEAIEYYQKALELDPNNAEAWYNLGNAYYKQGDYDEAIEYYQKALELDPSNLDAAVNLGAATMLTS O43_dn18A synthetic construct Escherichia coli BL21(DE3) LEVO MDRCEELARRIAEVVERAKRAGTSEDEIAESVARVISLVIRALKLSGSSYEVICECVARIVAEIVEALKRSGTSAVEIAKIVARVISEVIRTLKESGSSYEVICECVARIVAEIVEALKRSGTSAAIIALIVALVISEVIRTLKESGSSFEVILECVIRIVLEIIEALKRSGTSEQDVMLIVMAVLLVVLATLQLSGSGGWLEHHHHHH singleParticle particle 0.05 7.4 25.0 Tris-HCl 150.0 NaCl sodium chloride

TBS buffer, pH 7.4

NEGATIVE Uranyl Formate

Sample diluted to 0.05 mg/mL. 3 uL was applied onto the grid, blotted off, and then stained with 2% uranyl formate for 60 seconds.

COPPER 400 CARBON CONTINUOUS

O43_dn18 nanoparticle was purified by SEC, diluted to 0.05mg/ml and loaded onto a grid.

FEI TECNAI SPIRIT FLOOD BEAM BRIGHT FIELD LAB6 120 100.0 2.7 1.5 1.5 TVIPS TEMCAM-F416 (4k x 4k) 25.0 1

Negative stain EM map of the non-liganded O43_dn18 nanoparticle

1 O BACK PROJECTION 16.4 FSC 0.143 CUT-OFF RELION 3.0 9506 MAXIMUM LIKELIHOOD RELION 3.0 MAXIMUM LIKELIHOOD RELION 3.0 RELION 3.0