Quaternary complex between SRP, SR, and SecYEG bound to the translating ribosome

2026-09-16 REL PDBe INITIAL_RELEASE REPOSITORY EXPERIMENTAL_SUMMARY database_2 em_admin _database_2.pdbx_DOI _database_2.pdbx_database_accession _em_admin.last_update EXPERIMENTAL_SUMMARY em_admin _em_admin.last_update EXPERIMENTAL_SUMMARY em_admin _em_admin.last_update EXPERIMENTAL_SUMMARY em_admin _em_admin.last_update STRUCTURE_SUMMARY chem_comp_atom chem_comp_bond database_2 em_admin pdbx_entry_details struct_conn _database_2.pdbx_DOI _database_2.pdbx_database_accession _em_admin.last_update _struct_conn.pdbx_dist_value _struct_conn.ptnr1_auth_asym_id _struct_conn.ptnr1_auth_comp_id _struct_conn.ptnr1_auth_seq_id _struct_conn.ptnr1_label_asym_id _struct_conn.ptnr1_label_atom_id _struct_conn.ptnr1_label_comp_id _struct_conn.ptnr1_label_seq_id _struct_conn.ptnr2_auth_asym_id _struct_conn.ptnr2_auth_comp_id _struct_conn.ptnr2_auth_seq_id _struct_conn.ptnr2_label_asym_id _struct_conn.ptnr2_label_atom_id _struct_conn.ptnr2_label_comp_id DERIVED_CALCULATIONS em_admin pdbx_validate_close_contact struct_conn struct_conn_type _em_admin.last_update REMEDIATION REPOSITORY Metalloprotein remediation DERIVED_CALCULATIONS em_admin pdbx_nonpoly_atom_coordination pdbx_nonpoly_atom_coordination_sphere pdbx_nonpoly_atom_coordination_sphere_order pdbx_struct_conn_angle pdbx_validate_close_contact struct_conn struct_conn_type _em_admin.last_update DATA_COLLECTION em_admin _em_admin.last_update PDBe PDBe 2017-03-06 2016-01-27 2016-01-27 2026-09-16 Swiss National Science Foundation Switzerland National Consortium for RNA and Disease Switzerland Quaternary complex between SRP, SR, and SecYEG bound to the translating ribosome Jomaa A Hwang Fu Y Ribosome, SRP, Sec translocon, SRP receptor, quaternary complex Jomaa A Fu YH Boehringer D Leibundgut M Shan SO Ban N Structure of the quaternary complex between SRP, SR, and translocon bound to the translating ribosome. Nat Commun UK 8 15470 15470 2017 28524878 doi:10.1038/ncomms15470 2041-1723 5nco FULLOVERLAP EMDB EMD-3617 associated EM volume

Ribosome nascent chain, SRP, SR, and SecYEG quaternary complex Ribosome nascent chain, SRP, SR, and SecYEG quaternary complex 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 2.7 Ribosome 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 Escherichia coli SRP, SR, and SecYEG 1 35 36 37 38 39 40 Escherichia coli 4.5S SRP RNA (Ffs) Escherichia coli 0.033611926 1 GGCUCUGUUGGUUCUCCCGCAACGCUACUCUGUUUACCAGGUCAGGUCCGGAAGGAAGCAGCCAAGGCAGAUGACGCGUG UGCCGGGAUGUAGCUGGCAGGGCC LT615376.1 P-site tRNA-CCA end Escherichia coli 0.0008946119999999999 1 CCA 23S rRNA Escherichia coli 0.9413061879999999 1 GGUUAAGCGACUAAGCGUACACGGUGGAUGCCCUGGCAGUCAGAGGCGAUGAAGGACGUGCUAAUCUGCGAUAAGCGUCG GUAAGGUGAUAUGAACCGUUAUAACCGGCGAUUUCCGAAUGGGGAAACCCAGUGUGUUUCGACACACUAUCAUUAACUGA AUCCAUAGGUUAAUGAGGCGAACCGGGGGAACUGAAACAUCUAAGUACCCCGAGGAAAAGAAAUCAACCGAGAUUCCCCC AGUAGCGGCGAGCGAACGGGGAGCAGCCCAGAGCCUGAAUCAGUGUGUGUGUUAGUGGAAGCGUCUGGAAAGGCGCGCGA UACAGGGUGACAGCCCCGUACACAAAAAUGCACAUGCUGUGAGCUCGAUGAGUAGGGCGGGACACGUGGUAUCCUGUCUG AAUAUGGGGGGACCAUCCUCCAAGGCUAAAUACUCCUGACUGACCGAUAGUGAACCAGUACCGUGAGGGAAAGGCGAAAA GAACCCCGGCGAGGGGAGUGAAAAAGAACCUGAAACCGUGUACGUACAAGCAGUGGGAGCACGCUUAGGCGUGUGACUGC GUACCUUUUGUAUAAUGGGUCAGCGACUUAUAUUCUGUAGCAAGGUUAACCGAAUAGGGGAGCCGAAGGGAAACCGAGUC UUAACUGGGCGUUAAGUUGCAGGGUAUAGACCCGAAACCCGGUGAUCUAGCCAUGGGCAGGUUGAAGGUUGGGUAACACU AACUGGAGGACCGAACCGACUAAUGUUGAAAAAUUAGCGGAUGACUUGUGGCUGGGGGUGAAAGGCCAAUCAAACCGGGA GAUAGCUGGUUCUCCCCGAAAGCUAUUUAGGUAGCGCCUCGUGAAUUCAUCUCCGGGGGUAGAGCACUGUUUCGGCAAGG GGGUCAUCCCGACUUACCAACCCGAUGCAAACUGCGAAUACCGGAGAAUGUUAUCACGGGAGACACACGGCGGGUGCUAA CGUCCGUCGUGAAGAGGGAAACAACCCAGACCGCCAGCUAAGGUCCCAAAGUCAUGGUUAAGUGGGAAACGAUGUGGGAA GGCCCAGACAGCCAGGAUGUUGGCUUAGAAGCAGCCAUCAUUUAAAGAAAGCGUAAUAGCUCACUGGUCGAGUCGGCCUG CGCGGAAGAUGUAACGGGGCUAAACCAUGCACCGAAGCUGCGGCAGCGACGCUUAUGCGUUGUUGGGUAGGGGAGCGUUC UGUAAGCCUGCGAAGGUGUGCUGUGAGGCAUGCUGGAGGUAUCAGAAGUGCGAAUGCUGACAUAAGUAACGAUAAAGCGG GUGAAAAGCCCGCUCGCCGGAAGACCAAGGGUUCCUGUCCAACGUUAAUCGGGGCAGGGUGAGUCGACCCCUAAGGCGAG GCCGAAAGGCGUAGUCGAUGGGAAACAGGUUAAUAUUCCUGUACUUGGUGUUACUGCGAAGGGGGGACGGAGAAGGCUAU GUUGGCCGGGCGACGGUUGUCCCGGUUUAAGCGUGUAGGCUGGUUUUCCAGGCAAAUCCGGAAAAUCAAGGCUGAGGCGU GAUGACGAGGCACUACGGUGCUGAAGCAACAAAUGCCCUGCUUCCAGGAAAAGCCUCUAAGCAUCAGGUAACAUCAAAUC GUACCCCAAACCGACACAGGUGGUCAGGUAGAGAAUACCAAGGCGCUUGAGAGAACUCGGGUGAAGGAACUAGGCAAAAU GGUGCCGUAACUUCGGGAGAAGGCACGCUGAUAUGUAGGUGAGGUCCCUCGCGGAUGGAGCUGAAAUCAGUCGAAGAUAC CAGCUGGCUGCAACUGUUUAUUAAAAACACAGCACUGUGCAAACACGAAAGUGGACGUAUACGGUGUGACGCCUGCCCGG UGCCGGAAGGUUAAUUGAUGGGGUUAGCGCAAGCGAAGCUCUUGAUCGAAGCCCCGGUAAACGGCGGCCGUAACUAUAAC GGUCCUAAGGUAGCGAAAUUCCUUGUCGGGUAAGUUCCGACCUGCACGAAUGGCGUAAUGAUGGCCAGGCUGUCUCCACC CGAGACUCAGUGAAAUUGAACUCGCUGUGAAGAUGCAGUGUACCCGCGGCAAGACGGAAAGACCCCGUGAACCUUUACUA UAGCUUGACACUGAACAUUGAGCCUUGAUGUGUAGGAUAGGUGGGAGGCUUUGAAGUGUGGACGCCAGUCUGCAUGGAGC CGACCUUGAAAUACCACCCUUUAAUGUUUGAUGUUCUAACGUUGACCCGUAAUCCGGGUUGCGGACAGUGUCUGGUGGGU AGUUUGACUGGGGCGGUCUCCUCCUAAAGAGUAACGGAGGAGCACGAAGGUUGGCUAAUCCUGGUCGGACAUCAGGAGGU UAGUGCAAUGGCAUAAGCCAGCUUGACUGCGAGCGUGACGGCGCGAGCAGGUGCGAAAGCAGGUCAUAGUGAUCCGGUGG UUCUGAAUGGAAGGGCCAUCGCUCAACGGAUAAAAGGUACUCCGGGGAUAACAGGCUGAUACCGCCCAAGAGUUCAUAUC GACGGCGGUGUUUGGCACCUCGAUGUCGGCUCAUCACAUCCUGGGGCUGAAGUAGGUCCCAAGGGUAUGGCUGUUCGCCA UUUAAAGUGGUACGCGAGCUGGGUUUAGAACGUCGUGAGACAGUUCGGUCCCUAUCUGCCGUGGGCGCUGGAGAACUGAG GGGGGCUGCUCCUAGUACGAGAGGACCGGAGUGGACGCAUCACUGGUGUUCGGGUUGUCAUGCCAAUGGCACUGCCCGGU AGCUAAAUGCGGAAGAGAUAAGUGCUGAAAGCAUCUAAGCACGAAACUUGCCCCGAGAUGAGUUCUCCCUGACCCUUUAA GGGUCCUGAAGGAACGUUGAAGACGACGACGUUGAUAGGCCGGGUGUGUAAGCGCAGCGAUGCGUUGAGCUAACCGGUAC UAAUGAACCGUGAGGCUUAACCU V00348.1 5S rRNA Escherichia coli 0.03879008999999999 1 UGCCUGGCGGCCGUAGCGCGGUGGUCCCACCUGACCCCAUGCCGAACUCAGAAGUGAAACGCCGUAGCGCCGAUGGUAGU GUGGGGUCUCCCCAUGCGAGAGUAGGGAACUGCCAGGCAU CP010236.1 50S ribosomal protein L2 Escherichia coli 0.029663244 1 LEVO AVVKCKPTSPGRRHVVKVVNPELHKGKPFAPLLEKNSKSGGRNNNGRITTRHIGGGHKQAYRIVDFKRNKDGIPAVVERL EYDPNRSANIALVLYKDGERRYILAPKGLKAGDQIQSGVDAAIKPGNTLPMRNIPVGSTVHNVEMKPGKGGQLARSAGTY VQIVARDGAYVTLRLRSGEMRKVEADCRATLGEVGNAEHMLRVLGKAGAARWRGVRPTVRGTAMNPVDHPHGGGEGRNFG KHPVTPWGVQTKGKKTRSNKRTDKFIVRRRS P60422 50S ribosomal protein L3 Escherichia coli 0.022277534999999998 1 LEVO MIGLVGKKVGMTRIFTEDGVSIPVTVIEVEANRVTQVKDLANDGYRAIQVTTGAKKANRVTKPEAGHFAKAGVEAGRGLW EFRLAEGEEFTVGQSISVELFADVKKVDVTGTSKGKGFAGTVKRWNFRTQDATHGNSLSHRVPGSIGQNQTPGKVFKGKK MAGQMGNERVTVQSLDVVRVDAERNLLLVKGAVPGATGSDLIVKPAVKA P60438 50S ribosomal protein L4 Escherichia coli 0.022121566 1 LEVO MELVLKDAQSALTVSETTFGRDFNEALVHQVVVAYAAGARQGTRAQKTRAEVTGSGKKPWRQKGTGRARSGSIKSPIWRS GGVTFAARPQDHSQKVNKKMYRGALKSILSELVRQDRLIVVEKFSVEAPKTKLLAQKLKDMALEDVLIITGELDENLFLA ARNLHKVDVRDATGIDPVSLIAFDKVVMTADAVKQVEEMLA P60723 50S ribosomal protein L5 Escherichia coli 0.020073234 1 LEVO AKLHDYYKDEVVKKLMTEFNYNSVMQVPRVEKITLNMGVGEAIADKKLLDNAAADLAAISGQKPLITKARKSVAGFKIRQ GYPIGCKVTLRGERMWEFFERLITIAVPRIRDFRGLSAKSFDGRGNYSMGVREQIIFPEIDYDKVDRVRGLDITITTTAK SDEEGRALLAAFDFPFR P62399 50S ribosomal protein L6 Escherichia coli 0.018801598 1 LEVO SRVAKAPVVVPAGVDVKINGQVITIKGKNGELTRTLNDAVEVKHADNTLTFGPRDGYADGWAQAGTARALLNSMVIGVTE GFTKKLQLVGVGYRAAVKGNVINLSLGFSHPVDHQLPAGITAECPTQTEIVLKGADKQVIGQVAADLRAYRRPEPYKGKG VRYADEVVRTKEAKKK P0AG55 50S ribosomal protein L9 Escherichia coli 0.01578902 1 LEVO MQVILLDKVANLGSLGDQVNVKAGYARNFLVPQGKAVPATKKNIEFFEARRAELEAKLAEVLAAANARAEKINALETVTI ASKAGDEGKLFGSIGTRDIADAVTAAGVEVAKSEVRLPNGVLRTTGEHEVSFQVHSEVFAKVIVNVVAE P0A7R1 50S ribosomal protein L10 Escherichia coli 0.01349759 1 LEVO ALNLQDKQAIVAEVSEVAKGALSAVVADSRGVTVDKMTELRKAGREAGVYMRVVRNTLLRRAVEGTPFECLKDAFVGPTL IAYSMEHPGAAARLFKEFAKANAKFEVKAAAFEGELIPASQIDRL P0A7J3 50S ribosomal protein L11 Escherichia coli 0.014020303 1 LEVO YVKLQVAAGMANPSPPVGPALGQQGVNIMEFCKAFNAKTDSIEKGLPIPVVITVYADRSFTFVTKTPPAAVLLKKAAGIK SGSGKPNKDKVGKISRAQLQEIAQTKAADMTGADIEAMTRSIEGTARSMGLVVE P0A7J7 50S ribosomal protein L13 Escherichia coli 0.016050606 1 LEVO MKTFTAKPETVKRDWYVVDATGKTLGRLATELARRLRGKHKAEYTPHVDTGDYIIVLNADKVAVTGNKRTDKVYYHHTGH IGGIKQATFEEMIARRPERVIEIAVKGMLPKGPLGRAMFRKLKVYAGNEHNHAAQQPQVLDI P0AA10 50S ribosomal protein L14 Escherichia coli 0.013565066999999998 1 LEVO MIQEQTMLNVADNSGARRVMCIKVLGGSHRRYAGVGDIIKITIKEAIPRGKVKKGDVLKAVVVRTKKGVRRPDGSVIRFD GNACVLLNNNSEQPIGTRIFGPVTRELRSEKFMKIISLAPEVL P0ADY3 50S ribosomal protein L15 Escherichia coli 0.015008470999999999 1 LEVO MRLNTLSPAEGSKKAGKRLGRGIGSGLGKTGGRGHKGQKSRSGGGVRRGFEGGQMPLYRRLPKFGFTSRKAAITAEIRLS DLAKVEGGVVDLNTLKAANIIGIQIEFAKVILAGEVTTPVTVRGLRVTKGARAAIEAAGGKIEE P02413 50S ribosomal protein L16 Escherichia coli 0.015312269 1 LEVO MLQPKRTKFRKMHKGRNRGLAQGTDVSFGSFGLKAVGRGRLTARQIEAARRAMTRAVKRQGKIWIRVFPDKPITEKPLAV RMGKGKGNVEYWVALIQPGKVLYEMDGVPEELAREAFKLAAAKLPIKTTFVTKTVM P0ADY7 50S ribosomal protein L17 Escherichia coli 0.014193464999999999 1 LEVO MRHRKSGRQLNRNSSHRQAMFRNMAGSLVRHEIIKTTLPKAKELRRVVEPLITLAKTDSVANRRLAFARTRDNEIVAKLF NELGPRFASRAGGYTRILKCGFRAGDNAPMAYIELVDRSEKAEAA P0AG44 50S ribosomal protein L18 Escherichia coli 0.012794667999999999 1 LEVO MDKKSARIRRATRARRKLQELGATRLVVHRTPRHIYAQVIAPNGSEVLVAASTVEKAIAEQLKYTGNKDAAAAVGKAVAE RALEKGIKDVSFDRSGFQYHGRVQALADAAREAGLQF P0C018 50S ribosomal protein L19 Escherichia coli 0.013028082 1 LEVO SNIIKQLEQEQMKQDVPSFRPGDTVEVKVWVVEGSKKRLQAFEGVVIAIRNRGLHSAFTVRKISNGEGVERVFQTHSPVV DSISVKRRGAVRKAKLYYLRERTGKAARIKERLN P0A7K6 50S ribosomal protein L20 Escherichia coli 0.013396828 1 LEVO ARVKRGVIARARHKKILKQAKGYYGARSRVYRVAFQAVIKAGQYAYRDRRQRKRQFRQLWIARINAAARQNGISYSKFIN GLKKASVEIDRKILADIAVFDKVAFTALVEKAKAALA P0A7L3 50S ribosomal protein L21 Escherichia coli 0.011586374 1 LEVO MYAVFQSGGKQHRVSEGQTVRLEKLDIATGETVEFAEVLMIANGEEVKIGVPFVDGGVIKAEVVAHGRGEKVKIVKFRRR KHYRKQQGHRQWFTDVKITGISA P0AG48 50S ribosomal protein L22 Escherichia coli 0.012253359 1 LEVO METIAKHRHARSSAQKVRLVADLIRGKKVSQALDILTYTNKKAAVLVKKVLESAIANAEHNDGADIDDLKVTKIFVDEGP SMKRIMPRAKGRADRILKRTSHITVVVSDR P61175 50S ribosomal protein L23 Escherichia coli 0.010776669 1 LEVO IREERLLKVLRAPHVSEKASTAMEKSNTIVLKVAKDATKAEIKAAVQKLFEVEVEVVNTLVVKGKVKRHGQRIGRRSDWK KAYVTLKEGQNLDFV P0ADZ0 50S ribosomal protein L24 Escherichia coli 0.011078873999999999 1 LEVO AAKIRRDDEVIVLTGKDKGKRGKVKNVLSSGKVIVEGINLVKKHQKPVPALNQPGGIVEKEAAIQVSNVAIFNAATGKAD RVGFRFEDGKKVRFFKSNSETI P60624 50S ribosomal protein L25 Escherichia coli 0.010713465 1 LEVO MFTINAEVRKEQGKGASRRLRAANKFPAIIYGGKEAPLAIELDHDKVMNMQAKAEFYSEVLTIVVDGKEIKVKAQDVQRH PYKPKLQHIDFVRA P68919 50S ribosomal protein L27 Escherichia coli 0.008275498 1 LEVO TRNGRDSEAKRLGVKRFGGESVLAGSIIVRQRGTKFHAGANVGCGRDHTLFAKADGKVKFEVKGPKNRKFISIEAE P0A7L8 50S ribosomal protein L28 Escherichia coli 0.008896353999999999 1 LEVO SRVCQVTGKRPVTGNNRSHALNATKRRFLPNLHSHRFWVESEKRFVTLRVSAKGMRVIDKKGIDTVLAELRARGEKY P0A7M2 50S ribosomal protein L29 Escherichia coli 0.007155267 1 LEVO KAKELREKSVEELNTELLNLLREQFNLRMQAASGQLQQSHLLKQVRRDVARVKTLLNEKAGA P0A7M6 50S ribosomal protein L30 Escherichia coli 0.006423625 1 LEVO AKTIKITQTRSAIGRLPKHKATLLGLGLRRIGHTVEREDTPAIRGMINAVSFMVKVEE P0AG51 50S ribosomal protein L32 Escherichia coli 0.006332249 1 LEVO AVQQNKPTRSKRGMRRSHDALTAVTSLSVDKTSGEKHLRHHITADGYYRGRKVIAK P0A7N4 50S ribosomal protein L33 Escherichia coli 0.005928 1 LEVO GIREKIKLVSSAGTGHFYTTTKNKRTKPEKLELKKFDPVVRQHVIYKEAKI P0A7N9 50S ribosomal protein L34 Escherichia coli 0.005397463 1 LEVO MKRTFQPSVLKRNRSHGFRARMATKNGRQVLARRRAKGRARLTVSK P0A7P5 50S ribosomal protein L35 Escherichia coli 0.007181835 1 LEVO PKIKTVRGAAKRFKKTGKGGFKHKHANLRHILTKKATKRKRHLRPKAMVSKGDLGLVIACLPYA P0A7Q1 50S ribosomal protein L36 Escherichia coli 0.00437739 1 LEVO MKVRASVKKLCRNCKIVKRDGVIRVICSAEPKHKQRQG P0A7Q6 Protein translocase subunit SecY Escherichia coli 0.045627977 1 Escherichia coli BL21 LEVO GGLGELKRRLLFVIGALIVFRIGSFIPIPGIDAAVLAKLLEQQRGTIIEMFNMFSGGALSRASIFALGIMPYISASIIIQ LLTVVHPTLAEIKKEGESGRRKISQYTRYGTLVLAIFQSIGIATGLPNMPGMQGLVINPGFAFYFTAVVSLVTGTMFLMW LGEQITERGIGNGISIIIFAGIVAGLPPAIAHTIEQARQGDLHFLVLLLVAVLVFAVTFFVVFVERGQRRIVVNYAKRQQ GRRVYAAQSTHLPLKVNMAGVIPAIFASSIILFPATIASWFGGGTGWNWLTTISLYLQPGQPLYVLLYASAIIFFCFFYT ALVFNPRETADNLKKSGAFVPGIRPGEQTAKYIDKVMTRLTLVGALYITFICLIPEFMRDAMKVPFYFGGTSLLIVVVVI MDFMAQVQTLMMSSQY P0AGA2 Protein translocase subunit SecE Escherichia coli 0.006241414999999999 1 Escherichia coli BL21 LEVO ATVAFAREARTEVRKVIWPTRQETLHTTLIVAAVTAVMSLILWGLDGILVRLVSFI P0AG96 Signal recognition particle protein,Signal recognition particle protein,Signal recognition particle protein,Signal recognition particle protein,Signal recognition particle protein,Signal recognition particle protein,Signal recognition particle protein,Signal recognition particle protein,Signal recognition particle protein,Signal recognition particle protein Escherichia coli 0.048514722999999996 1 Escherichia coli BL21 LEVO NLTDRLSRTLRNISGRGRLTEDNVKDTLREVRMALLEADVALPVVREFINRVKEKAVGHEVNKSLTPGQEFVKIVRNELV AAMGEENQTLNLAAQPPAVVLMAGLQGAGKTTSVGKLGKFLREKHKKKVLVVSADVYRPAAIKQLETLAEQVGVDFFPSD VGQKPVDIVNAALKEAKLKFYDVLLVDTAGRLHVDEAMMDEIKQVHASINPVETLFVVDAMTGQDAANTAKAFNEALPLT GVVLTKVDGDARGGAALSIRHITGKPIKFLGVGEKTEALEPFHPDRIASRILGMGDVLSLIEDIESKVDRAQAEKLASKL KKGDGFDLNDFLEQLRQMKNMGG(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)DDKVLVRMEAIINSMTMKERAKPEI IKGSRKRRIAAGCGMQVQDVNRLLKQFDDMQRMMKKMKKGG(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) P0AGD7 P0AGD7 Protein-export membrane protein SecG Escherichia coli 0.0072346319999999995 1 Escherichia coli BL21 LEVO MYEALLVVFLIVAIGLVGLIMLQQGKGADMGASFGAGASATLFGSSGSGNFMTRMTALLATLFFIISLVLG P0AG99 Signal sequence (1A9L) Escherichia coli 0.00227682 1 Escherichia coli BL21 LEVO KQSTLALLLLLLLLTPVAAAAAA Signal recognition particle receptor FtsY Escherichia coli 0.029443721 1 Escherichia coli BL21 LEVO DDDLFEELEEQLLIADVGVETTRKIITNLTEGASRKQLRDAEALYGLLKEEMGEILAKVDEPLNVEGKAPFVILMVGVNG VGKTTTIGKLARQFEQQGKSVMLAAGDTFRAAAVEQLQVWGQRNNIPVIAQHTGADSASVIFDAIQAAKARNIDVLIADT AGRLQNKSHLMEELKKIVRVMKKLDVEAPHEVMLTIDASTGQNAVSQAKLFHEAVGLTGITLTKLDGTAKGGVIFSVADQ FGIPIRYIGVGERIEDLRPFKADDFIEALFA P10121 ZINC ION 6.5409e-05 1 ZN TETRAFLUOROALUMINATE ION 0.000102975 2 ALF MAGNESIUM ION 2.4305e-05 2 MG GUANOSINE-5'-DIPHOSPHATE 0.000443201 2 GDP singleParticle particle 0.1 7.5 Quantifoil R2/2 COPPER 200 CARBON CONTINUOUS GLOW DISCHARGE 30 ETHANE 100 277 FEI VITROBOT MARK I FEI TITAN KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 2.7 100719.0 FEI TITAN KRIOS AUTOGRID HOLDER NITROGEN 78.0 85.0 FEI FALCON II (4k x 4k) OTHER 20.0 1 1029950 CTFFIND 3

After 3D reconstruction 3D maps were sharpened

PHASE FLIPPING ONLY

empty ribosome low-pass filtered to 60 angstrom resolution

C1 4.8 FSC 0.143 CUT-OFF RELION 1.4 13926 PROJECTION MATCHING 7.5 RELION 1.4 PROJECTION MATCHING RELION 1.4

auto-refine with RELION

RELION 1.4 emd_3617.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 320 320 320 0 0 0 320 320 320 444.8 444.8 444.8 90.0 90.0 90.0 X Y Z -0.08334923 0.2102798 0.000493027 0.01404106 1.39 1.39 1.39 0.04 AUTHOR ::::EMDATABANK.org::::EMD-3617:::: 'Quaternary structure of the SRP, SR, SecYEG, and the translating ribosome' RIGID BODY FIT Cross-correlation coefficient RECIPROCAL