2020-09-30 REL PDBe PDBe PDBe 2017-12-20 2017-12-27 2018-02-28 2020-09-30 Netherlands Organisation for Scientific Research CW 714.013.002 Netherlands Netherlands Organisation for Scientific Research STW 13711 Netherlands Netherlands Organisation for Scientific Research 700.57.010 Netherlands European Research Council 233229 Netherlands Institute of Chemical Immunology NWO 024.002.009 Netherlands Netherlands Centre for Electron Nanoscopy NWO 175.010.2009.001 Netherlands Howes SC Koning RI de Jong RN Beurskens FJ Koster AJ Sharp TH Ugurlar D Howes SC de Kreuk BJ Koning RI de Jong RN Beurskens FJ Schuurman J Koster AJ Sharp TH Parren PWHI Gros P Science US 359 794 797 2018 29449492 doi:10.1126/science.aao4988 1095-9203 0038 SCIEAS EMD-4231 associated EM volume C1-IgG1 complex on liposomes C1-IgG1 complex on liposomes 0

Liposomes containing di-nitrophenyl haptens were incubated with monoclonal antibodies and C1

Homo sapiens 0.7 IgG1 antibodies 1

Monoclonal IgG1 recombinantly expressed in HEK293 FreeStyle cells, purified and bound to liposomes.

Homo sapiens Homo sapiens HEK293 C1 complex 1

C1 complex purified from human serum containing C1q, C1r, and C1s. Map from focused alignment and classification.

Homo sapiens subtomogramAveraging particle 1.3 8 50.0 C8H18N2O4S HEPES 145.0 NaCl sodium chloride 3.0 CaCl2 calcium chloride Quantifoil R2/1 GLOW DISCHARGE AIR ETHANE 96 294 LEICA EM GP

3 microlitres applied and incubated for 30 seconds, blot for 1 second before plunging.

Extruded liposomes were incubated with IgG1 and C1. Gold fiducials were added just before applying to grids.

FEI TITAN KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 70.0 2.7 0.3 53000.0 FEI TITAN KRIOS AUTOGRID HOLDER NITROGEN VOLTA PHASE PLATE GIF Quantum LS GATAN K2 SUMMIT (4k x 4k) COUNTING 3710 3838 5.0 1-6 1.2 1 C1 BACK PROJECTION 25.0 FSC 0.143 CUT-OFF Dynamo 1660 34 51274 Manually annotate liposome surfaces Dynamo 1.1.291

Equally spaced sub-volumes were extracted from the surfaces of liposomes

Dynamo 1.1.291 OTHER Dynamo 1.1.291

Volume matching after filtering reference volume to angular range present in sub-volume

emd_4231_additional_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 168 168 168 -84 -84 -84 168 168 168 903.84 903.84 903.84 90.0 90.0 90.0 X Y Z -6.5512075 9.39176 -0.208863600 0.99999994 5.38 5.38 5.38 AUTHOR ::::EMDATABANK.org::::EMD-4231:::: Class 1 of neighboring C1-IgG1 complexes emd_4231_additional_2.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 84 84 84 -42 -42 -42 84 84 84 451.92 451.92 451.92 90.0 90.0 90.0 X Y Z -5.284036 9.298583 0.00000000303 0.9999991 5.38 5.38 5.38 AUTHOR ::::EMDATABANK.org::::EMD-4231:::: C1-IgG1 complex observed on liposomes refined using mask that excluded the membrane and Fab regions emd_4231_additional_3.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 168 168 168 -84 -84 -84 168 168 168 903.84 903.84 903.84 90.0 90.0 90.0 X Y Z -5.594874 8.206433 -0.00000000375 0.9999998 5.38 5.38 5.38 AUTHOR ::::EMDATABANK.org::::EMD-4231:::: Class 2 of neighboring C1-IgG1 complexes emd_4231_additional_4.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 168 168 168 -84 -84 -84 168 168 168 903.84 903.84 903.84 90.0 90.0 90.0 X Y Z -6.2042494 11.260718 0.00000000150 0.9999999 5.38 5.38 5.38 AUTHOR ::::EMDATABANK.org::::EMD-4231:::: Class 3 of neighboring C1-IgG1 complexes emd_4231_half_map_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 84 84 84 -42 -42 -42 84 84 84 451.92 451.92 451.92 90.0 90.0 90.0 X Y Z -4.3041744 7.022374 -0.02079436 0.83091795 5.38 5.38 5.38 AUTHOR ::::EMDATABANK.org::::EMD-4231:::: Half map of C1-IgG1 complex observed on liposomes emd_4231_half_map_2.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 84 84 84 -8 -8 -8 84 84 84 451.92 451.92 451.92 90.0 90.0 90.0 X Y Z -4.09742 6.0649796 -0.020828646 0.7747555 5.38 5.38 5.38 AUTHOR ::::EMDATABANK.org::::EMD-4231:::: Half map of C1-IgG1 complex observed on liposomes