2024-04-24 REL PDBe PDBe PDBe 2024-01-29 2024-04-10 2024-04-10 2024-04-24 Alexander von Humboldt Foundation Germany German Research Foundation (DFG) BI 1998/2-1 Germany European Research Council (ERC) 856118 European Union Oosterheert W Boiero Sanders M Funk J Prumbaum D Raunser S Bieling P actin, formin, Cdc12, profilin, actin assembly, STRUCTURAL PROTEIN Oosterheert W Boiero Sanders M Funk J Prumbaum D Raunser S Bieling P Science US 384 eadn9560 eadn9560 2024 38603491 doi:10.1126/science.adn9560 1095-9203 0038 SCIEAS EMD-19496 other EM volume

Reconstruction of the phalloidin-stabilized F-actin barbed end bound by Cdc12, without profilin

EMD-19497 other EM volume

Reconstruction of the F-actin barbed end bound by Cdc12, without phalloidin and profilin

8rty FULLOVERLAP Actin-formin-profilin ring complex: the phalloidin-stabilized F-actin barbed end bound by dimeric-Cdc12 and profilin-S71M. Actin-formin-profilin ring complex: the phalloidin-stabilized F-actin barbed end bound by dimeric-Cdc12 and profilin-S71M. 0 1 2 3 4

Human beta-actin, human profilin1-S29C/S71M and S. Pombe Cdc12 were purified separately, phalloidin (from Amanita phalloides) was bought from sigma. All components were mixed to assemble the complex prior to cryo-EM grid preparation.

Actin filament 1 1 Homo sapiens Dimeric FH1FH2 domain of S. Pombe Cdc12 1 2 Schizosaccharomyces pombe Profilin-1-S29C/S71M 1 4 Homo sapiens Phalloidin 1 3

Stabilizes the actin filament.

Amanita phalloides Actin, cytoplasmic 1, N-terminally processed Homo sapiens 0.041632421999999995

Cytoplasmic beta-actin was recombinantly purified from BTI-Tnao38 cells.

4 Trichoplusia ni LEVO DDDIAALVVDNGSGMCKAGFAGDDAPRAVFPSIVGRPRHQGVMVGMGQKDSYVGDEAQSKRGILTLKYPIE(HIC)GIVT NWDDMEKIWHHTFYNELRVAPEEHPVLLTEAPLNPKANREKMTQIMFETFNTPAMYVAIQAVLSLYASGRTTGIVMDSGD GVTHTVPIYEGYALPHAILRLDLAGRDLTDYLMKILTERGYSFTTTAEREIVRDIKEKLCYVALDFEQEMATAASSSSLE KSYELPDGQVITIGNERFRCPEALFQPSFLGMESAGIHETTFNSIMKCDVDIRKDLYANTVLSGGTTMYPGIADRMQKEI TALAPSTMKIKIIAPPERKYSVWIGGSILASLSTFQQMWISKQEYDESGPSIVHRKCF P60709 Methylated-DNA--protein-cysteine methyltransferase,Cell division control protein 12 Schizosaccharomyces pombe 0.07788882

Cdc12(FH1FH2) was purified recombinantly from E. coli with a N-terminal snap-tag.

2 Escherichia coli LEVO GAMADKDCEMKRTTLDSPLGKLELSGCEQGLHEIKLLGKGTSAADAVEVPAPAAVLGGPEPLMQATAWLNAYFHQPEAIE EFPVPALHHPVFQQESFTRQVLWKLLKVVKFGEVISYQQLAALAGNPAATAAVKTALSGNPVPILIPCHRVVSSSGAVGG YEGGLAVKEWLLAHEGHRLGKPGLGPAGIGAPGSNNSKITNFDIPNDATSLPTIITHPTPPPPPPLPVKTSLNTFSHPDS VNIVANDTSVAGVMPAFPPPPPPPPPLVSAAGGKFVSPAVSNNISKDDLHKTTGLTRRPTRRLKQMHWEKLNSGLEFTFW TGPSDEANKILETLHTSGVLDELDESFAMKEAKTLVKKTCARTDYMSSELQKLFGIHFHKLSHKNPNEIIRMILHCDDSM NECVEFLSSDKVLNQPKLKADLEPYRIDWANGGDLVNSEKDASELSRWDYLYVRLIVDLGGYWNQRMNALKVKNIIETNY ENLVRQTKLIGRAALELRDSKVFKGLLYLILYLGNYMNDYVRQAKGFAIGSLQRLPLIKNANNTKSLLHILDITIRKHFP QFDNFSPELSTVTEAAKLNIEAIEQECSELIRGCQNLQIDCDSGALSDPTVFHPDDKILSVILPWLMEGTKKMDFLKEHL RTMNTTLNNAMRYFGEQPNDPNSKNLFFKRVDSFIIDYSKARSDNLKSEEEEASQHRRLNLVN P16455 Q10059 2.1.1.63 Phalloidin (Amanita phalloides) Amanita phalloides 0.000808899

Phalloidin was bought from sigma.

3 LEVO W(EEP)A(DTH)C(HYP)A Profilin-1 Homo sapiens 0.015000207 1 Escherichia coli LEVO AGWNAYIDNLMADGTCQDAAIVGYKDSPCVWAAVPGKTFVNITPAEVGVLVGKDRSSFYVNGLTLGGQKCMVIRDSLLQD GEFSMDLRTKSTGGAPTFNVTVTKTDKTLVLLMGKEGVHGGLINKKCYEMASHLRRSQY P07737 ADENOSINE-5'-DIPHOSPHATE 0.000427201 4 ADP MAGNESIUM ION 2.4305e-05 4 MG PHOSPHATE ION 9.4971e-05 3 PO4 singleParticle particle 7.1 10.0 HEPES 100.0 NaCl sodium chloride 2.0 MgCl2 magnesium chloride 1.0 EGTA 0.5 TCEP

1xKMEH (10 mM HEPES pH 7.1, 100 mM KCl, 2 mM MgCl2, 1 mM EGTA, 0.5 mM TCEP)

Quantifoil R2/1 GOLD 200 CARBON HOLEY GLOW DISCHARGE 90 ETHANE-PROPANE 100 286 FEI VITROBOT MARK IV

3 seconds, force 0..

FEI TITAN KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 50.0 0.01 1.2 3.0 81000.0 FEI TITAN KRIOS AUTOGRID HOLDER NITROGEN Titan Krios G2 microscope (Thermo Fisher Scientific) with an in-column Cs-corrector. GIF Bioquantum 15

Gatan energy filter.

300 kV Titan Krios G2 microscope (Thermo Fisher Scientific) with an in-column Cs-corrector.

GATAN K3 BIOQUANTUM (6k x 4k) 1 5287 63.3 1 1963686

Particles picked using SPHIRE-crYOLO.

EMD-19496

Reconstruction of Cdc12 bound to the phalloidin-stabilized F-actin barbed end, in the absence of profilin.

6.25 FSC 0.143 CUT-OFF cryoSPARC v4.2.1 29092 MAXIMUM LIKELIHOOD cryoSPARC v4.2.1 MAXIMUM LIKELIHOOD cryoSPARC v4.2.1 5 cryoSPARC v4.2.1

Masked 3D classification without image alignment in CryoSPARC (5 classes, target resolution 7 Angstrom, initialization mode simple).

8RTT PDB experimental model

actin-Cdc12-phalloidin model

2PAV PDB experimental model

profilin model

FLEXIBLE FIT

Refinement performed using phenix real-space refine

REAL emd_19499_msk_1.map emd_19499_additional_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 480 480 480 0 0 0 480 480 480 422.4 422.4 422.4 90.0 90.0 90.0 X Y Z -0.092861675 0.6556212 0.0010241653 0.02741601 0.88 0.88 0.88 AUTHOR ::::EMDATABANK.org::::EMD-19499:::: 3D-refined, unsharpened cryo-EM density map of the F-actin barbed end bound by Cdc12 and profilin-S71M emd_19499_half_map_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 480 480 480 0 0 0 480 480 480 422.4 422.4 422.4 90.0 90.0 90.0 X Y Z -1.0208061 1.4605196 0.00068100827 0.12206843 0.88 0.88 0.88 AUTHOR ::::EMDATABANK.org::::EMD-19499:::: Unfiltered half map 2 of the F-actin barbed end bound by Cdc12 and profilin-S71M emd_19499_half_map_2.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 480 480 480 0 0 0 480 480 480 422.4 422.4 422.4 90.0 90.0 90.0 X Y Z -1.1752824 1.5431759 0.0006526082 0.12273622 0.88 0.88 0.88 AUTHOR ::::EMDATABANK.org::::EMD-19499:::: Unfiltered half map 1 of the F-actin barbed end bound by Cdc12 and profilin-S71M