REL PDBe PDBe PDBe 2015-01-19 2015-03-11 2015-03-11 2015-09-23 Ozorowski G Derking R Sanders RW Ward AB HIV, Fab, Env trimer Derking R Ozorowski G Sliepen K Yasmeen A Cupo A Torres JL Julien J-P Lee JH van Montfort T de Taeye SW Connors M Burton DR Wilson IA Klasse PJ Ward AB Moore JP Sanders RW PLOS PATHOG. 11 e1004767 e1004767 2015 25807248 doi:10.1371/journal.ppat.1004767 Fab of 3BNC117 monoclonal antibody bound to recombinant HIV-1 Env gp140 BG505 SOSIP.664 trimer Fab of 3BNC117 monoclonal antibody bound to recombinant HIV-1 Env gp140 BG505 SOSIP.664 trimer

Size-exclusion chromatography purified gp140 trimers were used

One Fab molecule binds to one BG505 SOSIP.664 gp140 monomer 2 0.57 Theoretical MW of Fab based on primary sequence; MW of trimer estimated using published values Soluble HIV-1 Envelope glycoprotein Human immunodeficiency virus 1 BG505 HIV-1 0.42

gp140 trimers were expressed recombinantly and purified using 2G12-affinity and size-exclusion chromatography

1 Trimer true Homo sapiens HEK293F pPPI4 Fab of 3BNC117 human monoclonal antibody Homo sapiens Human 0.05

Expressed recombinantly as IgG and cleaved into Fab using papain

1 Dimer composed of heavy and light chain true Homo sapiens HEK293F singleParticle particle 0.01 7.4

50 mM Tris-HCl pH 7.4, 150 mM NaCl

NEGATIVE

3 microliters of 2% w/v uranyl formate were added to grids adsorbed with protein for 45 seconds and blotted

400 Cu mesh grid with carbon support, plasma cleaned

NONE OTHER FEI TECNAI 12 FLOOD BEAM BRIGHT FIELD LAB6 120 1.0 1.0 52000.0 52000.0 SIDE ENTRY, EUCENTRIC Objective lens astigmatism corrected at 52,000x mag 2014-09-29 TVIPS TEMCAM-F416 (4k x 4k) 145 25 -50 0

Particles were selected using an automatic selection program. A substack was created containing particles with 3 Fab molecules per trimer. An initial common-lines model was created using class averages and further refined using projection matching and an unbinned stack of particles.

C3 OTHER 20.0 OTHER EMAN2, SPARX 14956