2025-05-21 REL RCSB INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY EXPERIMENTAL_SUMMARY em_admin em_software _em_admin.last_update _em_software.name DATABASE_REFERENCES citation struct_ref struct_ref_seq _citation.journal_volume _citation.page_first _citation.page_last _struct_ref.db_code _struct_ref.pdbx_db_accession _struct_ref_seq.pdbx_db_accession OTHER atom_sites pdbx_audit_support _atom_sites.fract_transf_matrix[1][1] _atom_sites.fract_transf_matrix[2][2] _atom_sites.fract_transf_matrix[3][3] _pdbx_audit_support.funding_organization DATABASE_REFERENCES chem_comp_atom chem_comp_bond database_2 _database_2.pdbx_DOI _database_2.pdbx_database_accession STRUCTURE_SUMMARY em_admin em_software pdbx_entry_details _em_admin.last_update _em_software.name RCSB RCSB 2019-01-20 2019-05-22 2019-06-26 2025-05-21 Canadian Institutes of Health Research (CIHR) PJT-153044 Canada Ortega J Davis JH Hao Y Jahagirdar D Thurlow B Basu K Jain N Gomez-Blanco J Britton RA Vargas J Guarne A Woodson SA Williamson JR Ortega J Ribosome assembly, 30S subunit, YjeQ protein, Era protein; cryo-electron microscopy, RIBOSOME Razi A Davis JH Hao Y Jahagirdar D Thurlow B Basu K Jain N Gomez-Blanco J Britton RA Vargas J Guarne A Woodson SA Williamson JR Ortega J Nucleic Acids Res. UK 47 8301 8317 2019 31265110 doi:10.1093/nar/gkz571 1362-4962 0389 NARHAD 6nqb FULLOVERLAP 30S assembly intermediate (class P) 30S assembly intermediate (class P) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

30S assembly intermediate (class P) purified from Era-depleted E.coli cells

Escherichia coli K-12 0.9 30S ribosomal protein S3 Escherichia coli 0.023078784999999997 1 Escherichia coli LEVO GQKVHPNGIRLGIVKPWNSTWFANTKEFADNLDSDFKVRQYLTKELAKASVSRIVIERPAKSIRVTIHTARPGIVIGKKG EDVEKLRKVVADIAGVPAQINIAEVRKPELDAKLVADSITSQLERRVMFRRAMKRAVQNAMRLGAKGIKVEVSGRLGGAE IARTEWYREGRVPLHTLRADIDYNTSEAHTTYGVIGVKVWIFKGEI A0A376HTV6 30S ribosomal protein S10 Escherichia coli 0.011196988 1 Escherichia coli LEVO RIRIRLKAFDHRLIDQATAEIVETAKRTGAQVRGPIPLPTRKERFTVLISPHVNKDARDQYEIRTHLRLVDIVEPTEKTV DALMRLDLAAGVDVQISL D7X302 30S ribosomal protein S14 Escherichia coli 0.011360275999999999 1 Escherichia coli LEVO AKQSMKAREVKRVALADKYFAKRAELKAIISDVNASDERWNAVLKLQTLPRDSSPSRQRNRCRQTGRPHGFLRKFGLSRI KVREAAMRGEIPGLKKASW A0A090BZT4 30S ribosomal protein S19 Escherichia coli H736 0.008441836 1 Escherichia coli LEVO GPFIDLHLLKKVEKAVESGDKKPLRTWSRRSTIFPNMIGLTIAVHNGRQHVPVFVTDEMVGHKLGEFAPTRTYR F4SQ43 16S RIBOSOMAL RNA Escherichia coli 0.499690031 1 AAAUUGAAGAGUUUGAUCAUGGCUCAGAUUGAACGCUGGCGGCAGGCCUAACACAUGCAAGUCGAACGGUAACAGGAAGA AGCUUGCUUCUUUGCUGACGAGUGGCGGACGGGUGAGUAAUGUCUGGGAAACUGCCUGAUGGAGGGGGAUAACUACUGGA AACGGUAGCUAAUACCGCAUAACGUCGCAAGACCAAAGAGGGGGACCUUCGGGCCUCUUGCCAUCGGAUGUGCCCAGAUG GGAUUAGCUAGUAGGUGGGGUAACGGCUCACCUAGGCGACGAUCCCUAGCUGGUCUGAGAGGAUGACCAGCCACACUGGA ACUGAGACACGGUCCAGACUCCUACGGGAGGCAGCAGUGGGGAAUAUUGCACAAUGGGCGCAAGCCUGAUGCAGCCAUGC CGCGUGUAUGAAGAAGGCCUUCGGGUUGUAAAGUACUUUCAGCGGGGAGGAAGGGAGUAAAGUUAAUACCUUUGCUCAUU GACGUUACCCGCAGAAGAAGCACCGGCUAACUCCGUGCCAGCAGCCGCGGUAAUACGGAGGGUGCAAGCGUUAAUCGGAA UUACUGGGCGUAAAGCGCACGCAGGCGGUUUGUUAAGUCAGAUGUGAAAUCCCCGGGCUCAACCUGGGAACUGCAUCUGA UACUGGCAAGCUUGAGUCUCGUAGAGGGGGGUAGAAUUCCAGGUGUAGCGGUGAAAUGCGUAGAGAUCUGGAGGAAUACC GGUGGCGAAGGCGGCCCCCUGGACGAAGACUGACGCUCAGGUGCGAAAGCGUGGGGAGCAAACAGGAUUAGAUACCCUGG UAGUCCACGCCGUAAACGAUGUCGACUUGGAGGUUGUGCCCUUGAGGCGUGGCUUCCGGAGCUAACGCGUUAAGUCGACC GCCUGGGGAGUACGGCCGCAAGGUUAAAACUCAAAUGAAUUGACGGGGGCCCGCACAAGCGGUGGAGCAUGUGGUUUAAU UCGAUGCAACGCGAAGAACCUUACCUGGUCUUGACAUCCACGGAAGUUUUCAGAGAUGAGAAUGUGCCUUCGGGAACCGU GAGACAGGUGCUGCAUGGCUGUCGUCAGCUCGUGUUGUGAAAUGUUGGGUUAAGUCCCGCAACGAGCGCAACCCUUAUCC UUUGUUGCCAGCGGUCCGGCCGGGAACUCAAAGGAGACUGCCAGUGAUAAACUGGAGGAAGGUGGGGAUGACGUCAAGUC AUCAUGGCCCUUACGACCAGGGCUACACACGUGCUACAAUGGCGCAUACAAAGAGAAGCGACCUCGCGAGAGCAAGCGGA CCUCAUAAAGUGCGUCGUAGUCCGGAUUGGAGUCUGCAACUCGACUCCAUGAAGUCGGAAUCGCUAGUAAUCGUGGAUCA GAAUGCCACGGUGAAUACGUUCCCGGGCCUUGUACACACCGCCCGUCACACCAUGGGAGUGGGUUGCAAAAGAAGUAGGU AGCUUAACCUUCGGGAGGGCGCUUACCACUUUGUGAUUCAUGACUGGGGUGAAGUCGUAACAAGGUAACCGUAGGGGAAC CUGCGGUUGGAUCACCUCCUUA 30S ribosomal protein S4 Escherichia coli 0.023383002 1 Escherichia coli LEVO ARYLGPKLKLSRREGTDLFLKSGVRAIDTKCKIEQAPGQHGARKPRLSDYGVQLREKQKVRRIYGVLERQFRNYYKEAAR LKGNTGENLLALLEGRLDNVVYRMGFGATRAEARQLVSHKAIMVNGRVVNIASYQVSPNDVVSIREKAKKQSRVKAALEL AEQREKPTWLEVDAGKMEGTFKRKPERSDLSADINEHLIVELYSK L3PZ69 30S ribosomal protein S5 Escherichia coli 0.015675102 1 Escherichia coli LEVO ELQEKLIAVNRVSKTVKGGRIFSFTALTVVGDGNGRVGFGYGKAREVPAAIQKAMEKARRNMINVALNNGTLQHPVKGVH TGSRVFMQPASEGTGIIAGGAMRAVLEVAGVHNVLAKAYGSTNPINVVRATIDGLENMNSPEMVAAKRG A1AGJ2 30S ribosomal protein S6 Escherichia coli 0.010972642999999999 1 Escherichia coli LEVO MRHYEIVFMVHPDQSEQVPGMIERYTAAITGAEGKIHRLEDWGRRQLAYPINKLHKAHYVLMNVEAPQEVIDELETTFRF NDAVIRSMVMRTK A0A074QGH8 30S ribosomal protein S8 Escherichia coli 0.014015361 1 Escherichia coli LEVO SMQDPIADMLTRIRNGQAANKAAVTMPSSKLKVAIANVLKEEGFIEDFKVEGDTKPELELTLKYFQGKAVVESIQRVSRP GLRIYKRKDELPKVMAGLGIAVVSTSKGVMTDRAARQAGLGGEIICYVA D8A1L7 30S ribosomal protein S12 Escherichia coli 0.013636961 1 Escherichia coli LEVO ATVNQLVRKPRARKVAKSNVPALEACPQKRGVCTRVYTTTPKKPNSALRKVCRVRLTNGFEVTSYIGGEGHNLQEHSVIL IRGGRVKDLPGVRYHTVRGALDCSGVKDRKQARSKYGVKRPKA V6FZ95 30S ribosomal protein S15 Escherichia coli 0.009944415 1 Escherichia coli LEVO LSTEATAKIVSEFGRDANDTGSTEVQVALLTAQINHLQGHFAEHKKDHHSRRGLLRMVSQRRKLLDYLKRKDVARYTRLI ERLGLR Q8X9M2 30S RIBOSOMAL PROTEIN bS16 Escherichia coli 0.008936236999999998 1 Escherichia coli LEVO MVTIRLARHGAKKRPFYQVVVADSRNARNGRFIERVGFFNPIASEKEEGTRLDLDRIAHWVGQGATISDRVAALIKEVN S0UHH0 30S ribosomal protein S17 Escherichia coli 0.009164815 1 Escherichia coli LEVO KIRTLQGRVVSDKMEKSIVVAIERFVKHPIYGKFIKRTTKLHVHDENNECGIGDVVEIRECRPLSKTKSWTLVRVVEKA A0A0G3QJD8 30S ribosomal protein S18 Escherichia coli 0.006109118 1 Escherichia coli LEVO YKDIATLKNYITESGKIVPSRITGTRAKYQRQLARAIKRARYLSLLPYTDRH D7ZI16 30S ribosomal protein S20 Escherichia coli 0.00950619 1 Escherichia coli LEVO NIKSAKKRAIQSEKARKHNASRRSMMRTFIKKVYAAIEAGDKAAAQKAFNEMQPIVDRQAAKGLIHKNKAARHKANLTAQ INKLA T6N332 30S ribosomal protein S2 Escherichia coli 0.02412275 1 Escherichia coli LEVO LKAGVHFGHQTRYWNPKMKPFIFGARNKVHIINLEKTVPMFNEALAELNKIASRKGKILFVGTKRAASEAVKDAALSCDQ FFVNHRWLGGMLTNWKTVRQSIKRLKDLETQSQDGTFDKLTKKEALMRTRELEKLENSLGGIKDMGGLPDALFVIDADHE HIAIKEANNLGIPVFAIVDTNSDPDGVDFVIPGNDDAIRAVTLYLGAVAATVREGRS U9ZNW8 MAGNESIUM ION 2.4305e-05 1 MG singleParticle particle 7.5 C-flat-2/2 COPPER 200 CARBON HOLEY GLOW DISCHARGE 10

5 mA

ETHANE 100 298.15 FEI VITROBOT MARK III FEI TITAN KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 100.0 2.7 1.25 2.75 75000.0 FEI TITAN KRIOS AUTOGRID HOLDER NITROGEN FEI FALCON II (4k x 4k) INTEGRATING 35.0 1 847135 Gctf PHASE FLIPPING AND AMPLITUDE CORRECTION 2AVY C1 3.8 FSC 0.143 CUT-OFF RELION 2.1.0. 423567 PROJECTION MATCHING RELION 2.1.0. PROJECTION MATCHING RELION 2.1.0. RELION 2.1.0.