2021-03-10 REL RCSB RCSB RCSB 2020-09-26 2020-12-16 2020-12-16 2021-03-10 Bill & Melinda Gates Foundation OPP1115782 United States Ward AB Antanasijevic A Brouwer PJM Antanasijevic A de Gast M Allen JD Bijl TPL Yasmeen A Ravichandran R Burger JA Ozorowski G Torres JL LaBranche C Montefiori DC Ringe RP van Gils MJ Moore JP Klasse PJ Crispin M King NP Ward AB Sanders RW Npj Vaccines UK 6 24 24 2021 33563983 doi:10.1038/s41541-021-00285-9 2059-0105 EMD-22718 associated EM volume nsEM map of the 16055 SOSIP HIV Env trimer in complex with polyclonal Fab from rabbit r2467 (Week 22) nsEM map of the 16055 SOSIP HIV Env trimer in complex with polyclonal Fab from rabbit r2467 (Week 22) 0 1 synthetic construct Homo sapiens HEK293F pPPI4 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.

Homemade COPPER 400 CARBON CONTINUOUS GLOW DISCHARGE

16055 SOSIP.v8.3 was complexed with the purified polyclonal Fab overnight. The complex was purified using SEC and concentrated. The complex was then diluted in TBS to 0.05mg/ml to be loaded onto an imaging grid.

FEI TECNAI F20 FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 200 100.0 2.7 1.5 1.5 62000.0 TVIPS TEMCAM-F416 (4k x 4k) 1 25.0 1 129971

Negative Stain EM map of SOSIP trimer

C1 BACK PROJECTION 17.2 FSC 0.143 CUT-OFF RELION 3.0 81500 MAXIMUM LIKELIHOOD RELION 3.0 MAXIMUM LIKELIHOOD RELION 3.0 RELION 3.0

No fitting was performed