2020-11-25 REL PDBe PDBe PDBe 2018-11-13 2018-11-28 2019-02-20 2020-11-25 German Research Foundation 359471283 Germany Song B Flegler V Song B Lenhart J Flegler VJ Makbul C Rasmussen T Bottcher B Ultramicroscopy NE 203 145 154 2019 30738626 doi:10.1016/j.ultramic.2019.01.002 0304-3991 0953 ULTRDG EMD-4414 associated EM volume beta-galactosidase beta-galactosidase 0 1

sample was purchased from Sigma G5635

Escherichia coli 0.465 beta-galactosidase LEVO MTMITDSLAVVLQRRDWENPGVTQLNRLAAHPPFASWRNSEEARTDRPSQQLRSLNGEWR FAWFPAPEAVPESWLECDLPEADTVVVPSNWQMHGYDAPIYTNVTYPITVNPPFVPTENP TGCYSLTFNVDESWLQEGQTRIIFDGVNSAFHLWCNGRWVGYGQDSRLPSEFDLSAFLRA GENRLAVMVLRWSDGSYLEDQDMWRMSGIFRDVSLLHKPTTQISDFHVATRFNDDFSRAV LEAEVQMCGELRDYLRVTVSLWQGETQVASGTAPFGGEIIDERGGYADRVTLRLNVENPK LWSAEIPNLYRAVVELHTADGTLIEAEACDVGFREVRIENGLLLLNGKPLLIRGVNRHEH HPLHGQVMDEQTMVQDILLMKQNNFNAVRCSHYPNHPLWYTLCDRYGLYVVDEANIETHG MVPMNRLTDDPRWLPAMSERVTRMVQRDRNHPSVIIWSLGNESGHGANHDALYRWIKSVD PSRPVQYEGGGADTTATDIICPMYARVDEDQPFPAVPKWSIKKWLSLPGETRPLILCEYA HAMGNSLGGFAKYWQAFRQYPRLQGGFVWDWVDQSLIKYDENGNPWSAYGGDFGDTPNDR QFCMNGLVFADRTPHPALTEAKHQQQFFQFRLSGQTIEVTSEYLFRHSDNELLHWMVALD GKPLASGEVPLDVAPQGKQLIELPELPQPESAGQLWLTVRVVQPNATAWSEAGHISAWQQ WRLAENLSVTLPAASHAIPHLTTSEMDFCIELGNKRWQFNRQSGFLSQMWIGDKKQLLTP LRDQFTRAPLDNDIGVSEATRIDPNAWVERWKAAGHYQAEAALLQCTADTLADAVLITTA HAWQHQGKTLFISRKTYRIDGSGQMAITVDVEVASDTPHPARIGLNCQLAQVAERVNWLG LGPQENYPDRLTAACFDRWDLPLSDMYTPYVFPSENGLRCGTRELNYGPHQWRGDFQFNI SRYSQQQLMETSHRHLLHAEEGTWLNIDGFHMGIGGDDSWSPSVSAEFQLSAGRYHYQLV WCQK 3.2.1.23 singleParticle particle 2.6 7.9

The lyophilized protein powder was reconstituted into a 5 mg/ml solution with 50 mM Tris-HCl (pH 7.9), 50 mM NaCl, 2 mM MgCl2 and 2mM Mercaptoethanol. 300 ul of this solution were loaded onto a Superdex 200 10/300 GL (GE LifeSciences) size-exclusion chromatography column and eluted with 50 mM Tris-HCl (pH 7.9), 50 mM NaCl, 2 mM MgCl2 and 2 mM TCEP. Peak fractions corresponding to the tetrameric complex were pooled and concentrated to 2.6 mg/ml with a 50 kDa MWCO spin concentrator (Amicon, Millipore Co.). The sample were checked by SDS-PAGE with silver staining (Pierce silver staining kit, ThermoFischer Scientific).

Quantifoil R1.2/1.3 COPPER 400 CARBON HOLEY GLOW DISCHARGE AIR ETHANE 100 277 FEI VITROBOT MARK IV

Quantifoil 400 mesh copper grids R 1.2/1.3 were used (Quantifoil Micro Tools GmbH, Jena, Germany). Grids were glow discharged in air at a pressure of 2.2x10-2 Torr for 2 min at medium power with a Harrick Plasma cleaner (PDC-002). Subsequently, 3-4 ul of the sample was pipetted onto the glow discharged grids and plunge frozen in liquid Ethane with a Vitrobot IV (FEI). The sample chamber of the Vitrobot was maintained at 4C and 100% humidity. Wait time between sample application and blotting was 45 s, the drain time 0 s, the blot time 3 s and the blot force 0..

beta-Galactosidase from E. coli was purchased from SIGMA-ALDRICH (G5635).

FEI TITAN KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 70.0 2.7 1.5 1.12 2.5 2.77 75000.0 FEI TITAN KRIOS AUTOGRID HOLDER NITROGEN 79.0 80.0

data has been recorded in integrating mode 25 frames per movie

FEI FALCON III (4k x 4k) INTEGRATING 4096 4096 1 1389 4.3 52.0

images were collected in movie mode (25 frames in total)

1

Movies were motion corrected and exposure weighted with motioncor2. The defocus was determined for the motion corrected and exposure weighted averages with ctffind4

307321 RELION 1 D2 FOURIER SPACE 2.4 FSC 0.143 CUT-OFF RELION 3.0 146475 OTHER

the initial model was determined for a small sub-set using cistem

MAXIMUM LIKELIHOOD RELION 3.0 3 RELION 3.0 AB INITIO MODEL RECIPROCAL 34 emd_4414_half_map_2.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 600 600 600 0 0 0 600 600 600 638.10004 638.10004 638.10004 90.0 90.0 90.0 X Y Z -0.022702534 0.09674626 0.0000459522 0.0021138196 1.0635 1.0635 1.0635 AUTHOR ::::EMDATABANK.org::::EMD-4414:::: emd_4414_half_map_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 600 600 600 0 0 0 600 600 600 638.10004 638.10004 638.10004 90.0 90.0 90.0 X Y Z -0.022064136 0.10024469 0.0000464131 0.0021121367 1.0635 1.0635 1.0635 AUTHOR ::::EMDATABANK.org::::EMD-4414::::