CryoEM map of BG505 SOSIP.664 in complex with post boost 1 serum from rabbit 3417

2019-05-15 REL RCSB RCSB RCSB 2018-03-13 2018-04-11 2019-01-23 2019-05-15 CryoEM map of BG505 SOSIP.664 in complex with post boost 1 serum from rabbit 3417 Turner HL Ward AB Nogal B Bianchi M Turner HL Nogal B Cottrell CA Oyen D Pauthner M Bastidas R Nedellec R McCoy LE Wilson IA Burton DR Ward AB Hangartner L Electron-Microscopy-Based Epitope Mapping Defines Specificities of Polyclonal Antibodies Elicited during HIV-1 BG505 Envelope Trimer Immunization. Immunity US 49 288 300.e8 2018 30097292 doi:10.1016/j.immuni.2018.07.009 1097-4180 2048 IUNIEH EMD-7557 associated EM volume Complex of BG505 SOSIP.664 and serum antibodies from post boost 1 from rabbit 3417 Complex of BG505 SOSIP.664 and serum antibodies from post boost 1 from rabbit 3417 0

Serum was purified through SEC after using a Protein A or G column to capture complex then cleave IgG releasing Fab and trimer. Substoichiometric occupancy and flexibility show lack of density in Fab region while trimer core is refined to higher resolution. Map shows two strong densities for Fabs bound to the glycan hole and partial densities near the base of the trimer.

Human immunodeficiency virus Homo sapiens HEK293F singleParticle particle 1.44 7.4

TBS

Quantifoil R1.2/1.3 ETHANE 100 FEI VITROBOT MARK IV

Sample in TBS, added 0.5uL of DDM at 0.42mM. Sample was monodisperse

FEI TECNAI ARCTICA FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 200 FEI TITAN KRIOS AUTOGRID HOLDER NITROGEN GATAN K2 SUMMIT (4k x 4k) COUNTING 1-46 11.5 60.0 1

DogPicker was used to pick particles from micrographs

CTFFIND 3 5I8H 1 C1 FOURIER SPACE 4.7 FSC 0.143 CUT-OFF cryoSPARC 0.6.3 10828 ANGULAR RECONSTITUTION RELION 2.1 ANGULAR RECONSTITUTION cryoSPARC 0.6.3 emd_7557.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 300 300 300 0 0 0 300 300 300 345.0 345.0 345.0 90.0 90.0 90.0 X Y Z -0.2701374 1.1416786 0.0027772493 0.063059755 1.15 1.15 1.15 0.383 AUTHOR ::::EMDATABANK.org::::EMD-7557:::: BG505 SOSIP.664 in complex with serum from rabbit 3417 post boost 1. Map of antibodies bound to trimer after several rounds of 3D classification in CryoSparc.