2020-09-02 REL PDBe PDBe PDBe 2020-07-29 2020-09-02 2020-09-02 2020-09-02 European Research Council (ERC) 615984 Germany Quentin D Antoni C Gatsogiannis C Raunser S Antoni C Quentin D Lang AE Aktories K Gatsogiannis C Raunser S Plos Pathog. US 16 e1008530 e1008530 2020 32810181 doi:10.1371/journal.ppat.1008530 1553-7374 EMD-11525 associated EM volume Fully-loaded anthrax lethal toxin in its heptameric pre-pore state and PA7LF(2+1A)' arrangement Fully-loaded anthrax lethal toxin in its heptameric pre-pore state and PA7LF(2+1A)' arrangement 0 1 2

Three LF molecules crown the heptameric PA ring. The LFs form a continuous chain of head-to-tail interactions. In the PA7LF(2+1A)' arrangement, the third LF binds with its N-terminal domain to the C-terminal region of the 2nd LF. In addition, two LFs likely interact with each other via their C-terminal regions close to the central axis of the complex.

0.093 Protective antigen 1 1

The trypsin-activated 63 kDa fragments assemble into a hepatameric pre-pore

Bacillus anthracis Escherichia coli BL21 (DE3) Lethal factor 1 2

Three LF molecules crown the heptameric PA ring. The LFs form a continuous chain of head-to-tail interactions. In the PA7LF(2+1A) arrangement, the third LF binds with its N-terminal domain to the C-terminus of the 2nd LF. In addition, two LFs likely interact with each other via their C-terminal regions close to the central axis of the complex.

Bacillus anthracis Bacillus anthracis Protective antigen Bacillus anthracis Escherichia coli BL21(DE3) LEVO MGHHHHHHHHHHSSGHIDDDDKHMEVKQENRLLNESESSSQGLLGYYFSDLNFQAPMVVTSSTTGDLSIPSSELENIPSENQYFQSAIWSGFIKVKKSDEYTFATSADNHVTMWVDDQEVINKASNSNKIRLEKGRLYQIKIQYQRENPTEKGLDFKLYWTDSQNKKEVISSDNLQLPELKQKSSNSRKKRSTSAGPTVPDRDNDGIPDSLEVEGYTVDVKNKRTFLSPWISNIHEKKGLTKYKSSPEKWSTASDPYSDFEKVTGRIDKNVSPEARHPLVAAYPIVHVDMENIILSKNEDQSTQNTDSQTRTISKNTSTSRTHTSEVHGNAEVHASFFDIGGSVSAGFSNSNSSTVAIDHSLSLAGERTWAETMGLNTADTARLNANIRYVNTGTAPIYNVLPTTSLVLGKNQTLATIKAKENQLSQILAPNNYYPSKNLAPIALNAQDDFSSTPITMNYNQFLELEKTKQLRLDTDQVYGNIATYNFENGRVRVDTGSNWSEVLPQIQETTARIIFNGKDLNLVERRIAAVNPSDPLETTKPDMTLKEALKIAFGFNEPNGNLQYQGKDITEFDFNFDQQTSQNIKNQLAELNATNIYTVLDKIKLNAKMNILIRDKRFHYDRNNIAVGADESVVKEAHREVINSSTEGLLLNIDKDIRKILSGYIVEIEDTEGLKEVINDRYDMLNISSLRQDGKTFIDFKKYNDKLPLYISNPNYKVNVYAVTKENTIINPSENGDTSTNGIKKILIFSKKGYEIG Lethal factor Bacillus anthracis Bacillus anthracis LEVO MNIKKEFIKVISMSCLVTAITLSGPVFIPLVQGAGGHGDVGMHVKEKEKNKDENKRKDEE RNKTQEEHLKEIMKHIVKIEVKGEEAVKKEAAEKLLEKVPSDVLEMYKAIGGKIYIVDGD ITKHISLEALSEDKKKIKDIYGKDALLHEHYVYAKEGYEPVLVIQSSEDYVENTEKALNV YYEIGKILSRDILSKINQPYQKFLDVLNTIKNASDSDGQDLLFTNQLKEHPTDFSVEFLE QNSNEVQEVFAKAFAYYIEPQHRDVLQLYAPEAFNYMDKFNEQEINLSLEELKDQRMLAR YEKWEKIKQHYQHWSDSLSEEGRGLLKKLQIPIEPKKDDIIHSLSQEEKELLKRIQIDSS DFLSTEEKEFLKKLQIDIRDSLSEEEKELLNRIQVDSSNPLSEKEKEFLKKLKLDIQPYD INQRLQDTGGLIDSPSINLDVRKQYKRDIQNIDALLHQSIGSTLYNKIYLYENMNINNLT ATLGADLVDSTDNTKINRGIFNEFKKNFKYSISSNYMIVDINERPALDNERLKWRIQLSP DTRAGYLENGKLILQRNIGLEIKDVQIIKQSEKEYIRIDAKVVPKSKIDTKIQEAQLNIN QEWNKALGLPKYTKLITFNVHNRYASNIVESAYLILNEWKNNIQSDLIKKVTNYLVDGNG RFVFTDITLPNIAEQYTHQDEIYEQVHSKGLYVPESRSILLHGPSKGVELRNDSEGFIHE FGHAVDDYAGYLLDKNQSDLVTNSKKFIDIFKEEGSNLTSYGRTNEAEFFAEAFRLMHST DHAERLKVQKNAPKTFQFINDQIKFIINS singleParticle particle 0.06 8.5 20.0 Tris-HCl Tris hydrochloride 150.0 NaCl sodium chloride Quantifoil R1.2/1.3 COPPER 300 CARBON CONTINUOUS 2.0 GLOW DISCHARGE AIR ETHANE 95 286 GATAN CRYOPLUNGE 3

4 uL sample was applied to grid (with 2 nm additional carbon layer) and incubated for 45 s prior blotting..

FEI TITAN KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 2.7 1.2 2.6 130000.0 FEI TITAN KRIOS AUTOGRID HOLDER NITROGEN GIF Bioquantum 20 GATAN K2 SUMMIT (4k x 4k) COUNTING 5238 15.0 74.4 1 382000 SPHIRE 1TZO

The corresponding 3D class of the 3D classification step served as initial model for the refinement

1J7N

The corresponding 3D class of the 3D classification step served as initial model for the refinement

C1 4.3 FSC 0.143 CUT-OFF SPHIRE 30000 MAXIMUM LIKELIHOOD MAXIMUM LIKELIHOOD SPHIRE SPHIRE