REL PDBe PDBe PDBe 2014-01-15 2014-01-29 2014-03-26 2014-03-26 electron tomography average of an IgG hexamer Diebolder CA Beurskens FJ de Jong RN Koning RI Strumane K Lindorfer MA Voorhorst M Ugurlar D Rosati S Heck AJR van de Winkel JGJ Wilson IA Koster AJ Taylor RP Ollmann-Saphire E Burton DR Schuurman J Gros P Parren PWHI IgG hexamer, IgG, classical complement activation Diebolder CA Beurskens FJ de Jong RN Koning RI Strumane K Lindorfer MA Voorhorst M Ugurlar D Rosati S Heck AJR van de Winkel JGJ Wilson IA Koster AJ Taylor RP Ollmann-Saphire E Burton DR Schuurman J Gros P Parren PWHI Complement is activated by IgG hexamers assembled at the cell surface SCIENCE 343 1260 1263 2014 24626930 doi:10.1126/science.1248943 IgG1-005-RGY monoclonal antibody IgG1-005-RGY monoclonal antibody
sample is a mix of monomers and hexamers
one homohexamer 1 0.89 native mass spectrometry IgG1-005-E345R-E430G-S440Y Homo sapiens Human 0.1485 0.1454 6 Hexamer true Homo sapiens Freestyle 293-F pcDNA3.3 subtomogramAveraging particle 0.03 NEGATIVE
negative staining with 3% uranyl acetate
400 mesh copper grids with carbon support
 NONE OTHER FEI TECNAI F20 FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 200 2 1.01 1.035 50000.0 50000.0 SIDE ENTRY, EUCENTRIC Objective lens astigmatism was corrected at 50,000 times magnification 2013-09-03 GATAN ULTRASCAN 4000 (4k x 4k) -66 66
manual picking of 237 particles from two tomograms (PEET stalkInit), random particle as initial reference, iterative refinement in PEET
C1 OTHER 22.0 OTHER IMOD, PEET, TOMOCTF
final map was calculated from 200 sub tomograms
200 emd_2554.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 174 174 174 0 0 0 174 174 174 765.60004 765.60004 765.60004 90.0 90.0 90.0 X Y Z 41.395481109999999 166.617950439999987 119.885620119999999 2.07971597 4.4 4.4 4.4 125.0 AUTHOR reconstruction of IgG1-005-RGY hexamer
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 1HZH RIGID BODY FIT Chimera
manual docking
REAL
emd_2554.png
emd_2554_msk_1.map emd_2554_msk_1.map 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 174 174 174 0 0 0 174 174 174 765.60004 765.60004 765.60004 90.0 90.0 90.0 X Y Z 0.0 0.99388373 0.0089967 0.07452434 4.4 4.4 4.4 this mask represents the FC hexamer
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