2026-06-24 REL PDBe INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY EXPERIMENTAL_SUMMARY em_admin struct_ref _em_admin.last_update _struct_ref.pdbx_seq_one_letter_code DATABASE_REFERENCES citation em_admin _citation.journal_volume _citation.year _em_admin.last_update DATABASE_REFERENCES atom_site chem_comp_atom chem_comp_bond em_admin struct_ref _atom_site.auth_atom_id _atom_site.label_atom_id _chem_comp_atom.atom_id _chem_comp_bond.atom_id_1 _chem_comp_bond.atom_id_2 _em_admin.last_update _struct_ref.pdbx_seq_one_letter_code PDBe PDBe 2023-10-26 2024-12-11 2024-12-11 2026-06-24 German Research Foundation (DFG) Germany Wiechert F Schacherl M Sprink T Large ribosomal subunit, HeLa, modifications, polyamines, RIBOSOME Wiechert F Unbehaun A Sprink T Seibel H Burger J Loerke J Mielke T Diebolder CA Schacherl M Spahn CMT Nucleic Acids Res. UK 53 2025 39658079 doi:10.1093/nar/gkae1191 1362-4962 0389 NARHAD 8qyx FULLOVERLAP EMDB EMD-18765 associated EM volume

Human 60S ribosomal subunit

Human mature large ribosomal subunit Human mature large ribosomal subunit 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 41 42 43 44 Homo sapiens Large ribosomal subunit protein uL30 Homo sapiens 0.029290973 1 LEVO MEGVEEKKKEVPAVPETLKKKRRNFAELKIKRLRKKFAQKMLRKARRKLIYEKAKHYHKEYRQMYRTEIRMARMARKAGN FYVPAEPKLAFVIRIRGINGVSPKVRKVLQLLRLRQIFNGTFVKLNKASINMLRIVEPYIAWGYPNLKSVNELIYKRGYG KINKKRIALTDNALIARSLGKYGIICMEDLIHEIYTVGKRFKEANNFLWPFKLSSPRGGMKKKTTHFVEGGDAGNREDQI NRLIRRMN P18124 60S ribosomal protein L7a Homo sapiens 0.030061784999999997 1 LEVO MPKGKKAKGKKVAPAPAVVKKQEAKKVVNPLFEKRPKNFGIGQDIQPKRDLTRFVKWPRYIRLQRQRAILYKRLKVPPAI NQFTQALDRQTATQLLKLAHKYRPETKQEKKQRLLARAEKKAAGKGDVPTKRPPVLRAGVNTVTTLVENKKAQLVVIAHD VDPIELVVFLPALCRKMGVPYCIIKGKARLGRLVHRKTCTTVAFTQVNSEDKGALAKLVEAIRTNYNDRYDEIRRHWGGN VLGPKSVARIAKLEKAKAKELATKLG P62424 60S ribosomal protein L9 Homo sapiens 0.021899471 1 LEVO MKTILSNQTVDIPENVDITLKGRTVIVKGPRGTLRRDFNHINVELSLLGKKKKRLRVDKWWGNRKELATVRTICSHVQNM IKGVTLGFRYKMRSVYAHFPINVVIQENGSLVEIRNFLGEKYIRRVRMRPGVACSVSQAQKDELILEGNDIELVSNSAAL IQQATTVKNKDIRKFLDGIYVSEKGTVQQADE P32969 Ribosomal protein uL16-like Homo sapiens 0.024570948999999998 1 LEVO MGRRPARCYRYCKNKPYPKSRFCRGVPDAKIRIFDLGRKKAKVDEFPLGGHMVSDEYEQLSSEALEAARICANKYMVKSC GRDGFHMRVRLHPFHVIRINKMLSCAGADRLQTGMRGAFGKPQGTVARVHIGQVIMSIRTKLQNEEHVIEALRRAKFKFP GRQKIHISKKWGFTKFNADEFEDMVAKKCLIPDGCGVKYVPSHGPLDKWRVLHS Q96L21 60S ribosomal protein L11 Homo sapiens 0.020288465 1 LEVO MAQDQGEKENPMRELRIRKLCLNICVGESGDRLTRAAKVLEQLTGQTPVFSKARYTVRSFGIRRNEKIAVHCTVRGAKAE EILEKGLKVREYELRKNNFSDTGNFGFGIQEHIDLGIKYDPSIGIYGLDFYVVLGRPGFSIADKKRRTGCIGAKHRISKE EAMRWFQQKYDGIILPGK P62913 60S ribosomal protein L13 Homo sapiens 0.024321682 1 LEVO MAPSRNGMVLKPHFHKDWQRRVATWFNQPARKIRRRKARQAKARRIAPRPASGPIRPIVRCPTVRYHTKVRAGRGFSLEE LRVAGIHKKVARTIGISVDPRRRNKSTESLQANVQRLKEYRSKLILFPRKPSAPKKGDSSAEELKLATQLTGPVMPVRNV YKKEKARVITEEEKNFKAFASLRMARANARLFGIRAKRAKEAAEQDVEKKK P26373 60S ribosomal protein L14 Homo sapiens 0.023485015999999997 1 LEVO MVFRRFVEVGRVAYVSFGPHAGKLVAIVDVIDQNRALVDGPCTQVRRQAMPFKCMQLTDFILKFPHSAHQKYVRQAWQKA DINTKWAATRWAKKIEARERKAKMTDFDRFKVMKAKKMRNRIIKNEVKKLQKAALLKASPKKAPGTKGTAAAAAAAAAAK VPAKKITAASKKAPAQKVPAQKATGQKAAPAPKAQKGQKAPAQKAPAPKASGKKA P50914 60S ribosomal protein L15 Homo sapiens 0.024207285 1 LEVO MGAYKYIQELWRKKQSDVMRFLLRVRCWQYRQLSALHRAPRPTRPDKARRLGYKAKQGYVIYRIRVRRGGRKRPVPKGAT YGKPVHHGVNQLKFARSLQSVAEERAGRHCGALRVLNSYWVGEDSTYKFFEVILIDPFHKAIRRNPDTQWITKPVHKHRE MRGLTSAGRKSRGLGKGHKFHHTIGGSRRAAWRRRNTLQLHRYR P61313 60S ribosomal protein L13a Homo sapiens 0.023633412 1 LEVO MAEVQVLVLDGRGHLLGRLAAIVAKQVLLGRKVVVVRCEGINISGNFYRNKLKYLAFLRKRMNTNPSRGPYHFRAPSRIF WRTVRGMLPHKTKRGQAALDRLKVFDGIPPPYDKKKRMVVPAALKVVRLKPTRKFAYLGRLAHEVGWKYQAVTATLEEKR KEKAKIHYRKKKQLMRLRKQAEKNVEKKIDKYTEVLKTHGLLV P40429 60S ribosomal protein L17 Homo sapiens 0.021443169999999998 1 LEVO MVRYSLDPENPTKSCKSRGSNLRVHFKNTRETAQAIKGMHIRKATKYLKDVTLQKQCVPFRRYNGGVGRCAQAKQWGWTQ GRWPKKSAEFLLHMLKNAESNAELKGLDVDSLVIEHIQVNKAPKMRRRTYRAHGRINPYMSSPCHIEMILTEKEQIVPKP EEEVAQKKKISQKKLKKQKLMARE P18621 60S ribosomal protein L18 Homo sapiens 0.021687676 1 LEVO MGVDIRHNKDRKVRRKEPKSQDIYLRLLVKLYRFLARRTNSTFNQVVLKRLFMSRTNRPPLSLSRMIRKMKLPGRENKTA VVVGTITDDVRVQEVPKLKVCALRVTSRARSRILRAGGKILTFDQLALDSPKGCGTVLLSGPRKGREVYRHFGKAPGTPH SHTKPYVRSKGRKFERARGRRASRGYKN Q07020 60S ribosomal protein L19 Homo sapiens 0.023535280999999998 1 LEVO MSMLRLQKRLASSVLRCGKKKVWLDPNETNEIANANSRQQIRKLIKDGLIIRKPVTVHSRARCRKNTLARRKGRHMGIGK RKGTANARMPEKVTWMRRMRILRRLLRRYRESKKIDRHMYHSLYLKVKGNVFKNKRILMEHIHKLKADKARKKLLADQAE ARRSKTKEARKRREERLQAKKEEIIKTLSKEEETKK P84098 60S ribosomal protein L18a Homo sapiens 0.020808513999999997 1 LEVO MKASGTLREYKVVGRCLPTPKCHTPPLYRMRIFAPNHVVAKSRFWYFVSQLKKMKKSSGEIVYCGQVFEKSPLRVKNFGI WLRYDSRSGTHNMYREYRDLTTAGAVTQCYRDMGARHRARAHSIQIMKVEEIAASKCRRPAVKQFHDSKIKFPLPHRVLR RQHKPRFTTKRPNTFF Q02543 60S ribosomal protein L21 Homo sapiens 0.018609988 1 LEVO MTNTKGKRRGTRYMFSRPFRKHGVVPLATYMRIYKKGDIVDIKGMGTVQKGMPHKCYHGKTGRVYNVTQHAVGIVVNKQV KGKILAKRINVRIEHIKHSKSRDSFLKRVKENDQKKKEAKEKGTWVQLKRQPAPPREAHFVRTNGKEPELLEPIPYEFMA P46778 60S ribosomal protein L22 Homo sapiens 0.014813014999999999 1 LEVO MAPVKKLVVKGGKKKKQVLKFTLDCTHPVEDGIMDAANFEQFLQERIKVNGKAGNLGGGVVTIERSKSKITVTSEVPFSK RYLKYLTKKYLKKNNLRDWLRVVANSKESYELRYFQINQDEEEEEDED P35268 60S ribosomal protein L23 Homo sapiens 0.014892504999999999 1 LEVO MSKRGRGGSSGAKFRISLGLPVGAVINCADNTGAKNLYIISVKGIKGRLNRLPAAGVGDMVMATVKKGKPELRKKVHPAV VIRQRKSYRRKDGVFLYFEDNAGVIVNNKGEMKGSAITGPVAKECADLWPRIASNAGSIA P62829 60S ribosomal protein L24 Homo sapiens 0.017825111 1 LEVO MKVELCSFSGYKIYPGHGRRYARTDGKVFQFLNAKCESAFLSKRNPRQINWTVLYRRKHKKGQSEEIQKKRTRRAVKFQR AITGASLADIMAKRNQKPEVRKAQREQAIRAAKEAKKAKQASKKTAMAAAKAPTKAAPKQKIVKPVKVSAPRVGGKR P83731 60S ribosomal protein L23a Homo sapiens 0.017740192999999998 1 LEVO MAPKAKKEAPAPPKAEAKAKALKAKKAVLKGVHSHKKKKIRTSPTFRRPKTLRLRRQPKYPRKSAPRRNKLDHYAIIKFP LTTESAMKKIEDNNTLVFIVDVKANKHQIKQAVKKLYDIDVAKVNTLIRPDGEKKAYVRLAPDYDALDVANKIGII P62750 60S ribosomal protein L26 Homo sapiens 0.017303363 1 LEVO MKFNPFVTSDRSKNRKRHFNAPSHIRRKIMSSPLSKELRQKYNVRSMPIRKDDEVQVVRGHYKGQQIGKVVQVYRKKYVI YIERVQREKANGTTVHVGIHPSKVVITRLKLDKDRKKILERKAKSRQVGKEKGKYKEETIEKMQE P61254 60S ribosomal protein L27 Homo sapiens 0.015835830999999998 1 LEVO MGKFMKPGKVVLVLAGRYSGRKAVIVKNIDDGTSDRPYSHALVAGIDRYPRKVTAAMGKKKIAKRSKIKSFVKVYNYNHL MPTRYSVDIPLDKTVVNKDVFRDPALKRKARREAKVKFEERYKTGKNKWFFQKLRF P61353 Large ribosomal subunit protein uL15 Homo sapiens 0.016619527 1 LEVO MPSRLRKTRKLRGHVSHGHGRIGKHRKHPGGRGNAGGL(V5N)HHRINFDKYHPGYFGKVGMKHYHLKRNQSFCPTVNLD KLWTLVSEQTRVNAAKNKTGAAPIIDVVRSGYYKVLGKGKLPKQPVIVKAKFFSRRAEEKIKSVGGACVLVA P46776 60S ribosomal protein L29 Homo sapiens 0.017804275 1 LEVO MAKSKNHTTHNQSRKWHRNGIKKPRSQRYESLKGVDPKFLRNMRFAKKHNKKGLKKMQANNAKAMSARAEAIKALVKPKE VKPKIPKGVSRKLDRLAYIAHPKLGKRARARIAKGLRLCRPKAKAKAKAKDQTKAQAAAPASVPAQAPKRTQAPTKASE P47914 60S ribosomal protein L30 Homo sapiens 0.012805092 1 LEVO MVAAKKTKKSLESINSRLQLVMKSGKYVLGYKQTLKMIRQGKAKLVILANNCPALRKSEIEYYAMLAKTGVHHYSGNNIE LGTACGKYYRVCTLAIIDPGDSDIIRSMPEQTGEK P62888 60S ribosomal protein L31 Homo sapiens 0.014494937999999999 1 LEVO MAPAKKGGEKKKGRSAINEVVTREYTINIHKRIHGVGFKKRAPRALKEIRKFAMKEMGTPDVRIDTRLNKAVWAKGIRNV PYRIRVRLSRKRNEDEDSPNKLYTLVTYVPVTTFKNLQTVNVDEN P62899 60S ribosomal protein L32 Homo sapiens 0.015898932 1 LEVO MAALRPLVKPKIVKKRTKKFIRHQSDRYVKIKRNWRKPRGIDNRVRRRFKGQILMPNIGYGSNKKTKHMLPSGFRKFLVH NVKELEVLLMCNKSYCAEIAHNVSSKNRKAIVERAAQLAIRVTNPNARLRSEENE P62910 60S ribosomal protein L35a Homo sapiens 0.012564743 1 LEVO MSGRLWSKAIFAGYKRGLRNQREHTALLKIEGVYARDETEFYLGKRCAYVYKAKNNTVTPGGKPNKTRVIWGKVTRAHGN SGMVRAKFRSNLPAKAIGHRIRVMLYPSRI P18077 60S ribosomal protein L34 Homo sapiens 0.013326074 1 LEVO MVQRLTYRRRLSYNTASNKTRLSRTPGNRIVYLYTKKVGKAPKSACGVCPGRLRGVRAVRPKVLMRLSKTKKHVSRAYGG SMCAKCVRDRIKRAFLIEEQKIVVKVLKAQAQSQKAK P49207 60S ribosomal protein L35 Homo sapiens 0.014593624 1 LEVO MAKIKARDLRGKKKEELLKQLDDLKVELSQLRVAKVTGGAASKLSKIRVVRKSIARVLTVINQTQKENLRKFYKGKKYKP LDLRPKKTRAMRRRLNKHEENLKTKKQQRKERLYPLRKYAVKA P42766 60S ribosomal protein L36 Homo sapiens 0.012290859 1 LEVO MALRYPMAVGLNKGHKVTKNVSKPRHSRRRGRLTKHTKFVRDMIREVCGFAPYERRAMELLKVSKDKRALKFIKKRVGTH IRAKRKREELSNVLAAMRKAAAKKD Q9Y3U8 60S ribosomal protein L37 Homo sapiens 0.011111031999999998 1 LEVO MTKGTSSFGKRRNKTHTLCRRCGSKAYHLQKSTCGKCGYPAKRKRKYNWSAKAKRRNTTGTGRMRHLKIVYRRFRHGFRE GTTPKPKRAAVAASSSS P61927 60S ribosomal protein L38 Homo sapiens 0.008238948 1 LEVO MPRKIEEIKDFLLTARRKDAKSVKIKKNKDNVKFKVRCSRYLYTLVITDKEKAEKLKQSLPPGLAVKELK P63173 60S ribosomal protein L39 Homo sapiens 0.006426759 1 LEVO MSSHKTFRIKRFLAKKQKQNRPIPQWIRMKTGNKIRYNSKRRHWRRTKLGL P62891 Large ribosomal subunit protein eL40 Homo sapiens 0.014771411 1 LEVO MQIFVKTLTGKTITLEVEPSDTIENVKAKIQDKEGIPPDQQRLIFAGKQLEDGRTLSDYNIQKESTLHLVLRLRGGIIEP SLRQLAQKYNCDKMICR(MLZ)CYARLHPRAVNCRKKKCGHTNNLRPKKKVK P62987 60S ribosomal protein L36a Homo sapiens 0.012476972999999999 1 LEVO MVNVPKTRRTFCKKCGKHQPHKVTQYKKGKDSLYAQGKRRYDRKQSGYGGQTKPIFRKKAKTTKKIVLRLECVEPNCRSK RMLAIKRCKHFELGGDKKRKGQVIQF P83881 60S ribosomal protein L37a Homo sapiens 0.01029935 1 LEVO MAKRTKKVGIVGKYGTRYGASLRKMVKKIEISQHAKYTCSFCGKTKMKRRAVGIWHCGSCMKTVAGGAWTYNTTSAVTVK SAIRRLKELKDQ P61513 60S ribosomal protein L28 Homo sapiens 0.015784621999999998 1 LEVO MSAHLQWMVVRNCSSFLIKRNKQTYSTEPNNLKARNSFRYNGLIHRKTVGVEPAADGKGVVVVIKRRSGQRKPATSYVRT TINKNARATLSSIRHMIRKNKYRPDLRMAAIRRASAILRSQKPVMVKRKRTRPTKSS P46779 28S rRNA Homo sapiens 1.640816625 1 CGCGACCUCAGAUCAGACGUGGCGACCCGCUGAAUUUAAGCAUAUUAGUCAGCGGAGGAGAAGAAACUAACCAGGAUUCC CUCAGUAACGGCGAGUGAACAGGGAAGAGCCCAGCGCCGAAUCCCCGCCCCGCGGCGGGGCGCGGGACAUGUGGCGUACG GAAGACCCGCUCCCCGGCGCCGCUCGUGGGGGGCCCAAGUCCUUCUGAUCGAGGCCCAGCCCG(PSU)GGACGGUGUGAG GCCGGUAGCGGCCCCCGGCGCGCCGGGCCCGGGUCUUCCCGGAGUCGGGUUGCUUGGGAAUGCAGCCCAAAGCGGGUGGU AAACUCCAUCUAAGGCUAAAUACCGGCACGAGACCGAUAGUCAACAAGUACCGUAAGGGAAAGUUGAAAAGAACUUUGAA G(A2M)G(A2M)GAGUUCAAGAGGGCGUGAAACCGUUAAGAGGUAAACGGGUGGGGUCCGCGCAGUCCGCCCGGAGGAUU CAACCCGGCGGCGGGUCCGGCCGUGUCGGCGGCCCGGCGGAUCUUUCCCGCCCCCCGUUCCUCCCGACCCCUCCACCCGC CCUCCCUUCCCCCGCCGCCCCUCCUCCUCCUCCCCGGAGGGGGCGGGCUCCGGCGGGUGCGGGGGUGGGCGGGCGGGGCC GGGGGUGGGGUCGGCGGGGGACCGUCCCCCGACCGGCGACCGGCCGCCGCCGGGCGCAUUUCCACCGCGGCGGUGCGCCG CGACCGGCUCCGGGACGGCUGGGAAGGCCCGGCGGGGAAGGUGGCUCGGGGGGCCCCGUCCGUCCGUCCGUCCGUCCUCC UCCUCCCCCGUCUCCGCCCCCCGGCCCCGCGUCCUCCCUCGGGAGGGCGCGCGGGUCGGGGCGGCGGCGGCGGCGGCGGU GGCGGCGGCGGCGGCGGCGGCGGGACCGAAACCCCCCCCGAGUGUUACAGCCCCCCCGGCAGCAGCACUCGCCGAAUCCC GGGGCCGAGGGAGCGAGACCCGUCGCCGCGCUCUCCCCCCUCCCGGCGCCCACCCCCGCGGGGAAUCCCCCGCGAGGGGG GUCUCCCCCGCGGGGGCGCGCCGGCGUCUCCUCGUGGGGGGGCCGGGCCACCCCUCCCACGGCGCGACCGCUCUCCCACC CCUCCUCCCCGCGCCCCCGCCCCGGCGACGGGGGGGGUGCCGCGCGCGGGUCGGGGGGCGGGGCGGACUGUCCCCAGUGC GCCCCGGGCGGGUCGCGCCGUCGGGCCCGGGGGAGGUUCUCUCGGGGCCACGCGCGCGUCCCCCGAAGAGGGGGACGGCG GAGCGAGCGCACGGGGUCGGCGGCGACGUCGGCUACCCACCCGACCC(OMG)UCUUG(1MA)(A2M)AC(A2M)CGGACC AAGGAGU(OMC)UAACACGUGCGCGAGUCGGGGGCUCGCACGAAAGCCGCCGUGGCGCAAUGAAGGUGAAGGCCGGCGCG CUCGCCGGCCGAGGUGGGAUCCCGAGGCCUCUCCAGUCCGCCGAGGGCGCACCACCGGCCCGUCUCGCCCGCCGCGCCGG GGAGGUGGAGCACGAGCGCACGUGUUAGGACCC(OMG)A(A2M)AGAUGGUGA(A2M)C(PSU)AUGCCUGGGCAGGGCG AAGCCAGAGGAAACUCUGGUGGAGGUCCGUAGCGGUCCUGACGUGCAAAUCGGUCGUCCGACCUGGGUAUAG(OMG)GGC GAAAGACUAAUCGAACCAUCUAGUAGCUGGUUCCCUCCGAAGUUUCCC(PSU)CAGGA(PSU)AGCUGGCGCUCUCGCAG ACCCGACGCACCCCCGCCACGCAGUUUUAUCCGGUAAAGCGAA(PSU)GAUUAGAGGUCUUGGGGCCGAAACGAUCUCAA CC(PSU)A(PSU)(PSU)CUCAAACUU(PSU)AAAUGGGUAAGAAGCCCGGCUCGCUGGCGUGGAGCCGGGCGUGGAAUG CGAGUGCCUAGUGGGCCA(B8T)(PSU)U(PSU)UGGUAAGC(A2M)GAACUGGCG(OMC)UGCGGGAUGAACCGAACGC CGGGUUAAGGCGCCCGAUGCCGACGCUCAUCAGACCCCAGAAAAGGUGUUGGUUGAUAUAGACAGCAGGACGGUGGCCAU GGAAGUCGGAAUCCGCUAAGGAGUGUGUAACAACUCACCUGCCGAAUCAACUAGCCCUGAAAAUGGAUGGCGCUGGAGCG UCGGGCCCAUACCCGGCCGUCGCCGGCAGUCGAGAGUGGACGGGAGCGGCGGGGGCGGCGCGCGCGCGCGCGCGUGUGGU GUGCGUCGGAGGGCGGCGGCGGCGGCGGCGGCGGGGGUGUGGGGUCCUUCCCCCGCCCCCCCCCCCACGCCUCCUCCCCU CCUCCCGCCCACGCCCCGCUCCCCGCCCCCGGAGCCCCGCGGACGCUACGCCGCGACGAGUAGGAGGGCCGCUGCGGUGA GCCUUGAAGCCUAGGGCGCGGGCCCGGGUGGAGCCGCCGCAGGUGCAGAU(OMC)UUGGUGGUAGU(A2M)(OMG) (OMC)AAAUAUUCAAACGAGAACUUUGAAGGCCGAAGUGG(A2M)GAAGGGUUCCAUG(OMU)GAACAG(OMC)A(OMG) UUGAACAUGGGUCAGUCGGUCCUGAGAGAUGGGCGAGCGCCGUUCCGAAGGGACGGGCGAUGGCCUCCGUUGCCCUCGGC CGA(PSU)CGAAAGGGAGUCGGGUUCAGAUCCCCGAAUCCGGAGUGGCGGAGAUGGGCGCCGCGAGGCGUCCAGUGCGGU AACGCGACCGAUCCCGGAGAAGCCGGCGGGAGCCCCGGGGAGAGUUCUCUU(PSU)UCUUUGUGAAGGGCAGGGCGCCCU GGAAUGGGUUCGCCCCGAGAGAGGGGCCCGUGCCUUGGAAAGCGUCGCGGUUCCGGCGGCGUCCGGUGAGCUCUCGCUGG CCCUUGAAAAUCCGGGGGAGAGGGUGUAAAUCUCGCGCCGGGCCGUACCC(A2M)UAUCCGCAGCAGGUCU(OMC)CAAG GUGAAC(A2M)GCCUCUGG(OMC)AUGUUGGAACAA(OMU)G(PSU)AGGUAAGGGAAGUCGGCAAGC(OMC)GGAUCCG UAACUUC(OMG)GGAUAAGGAUUGGCUCUAAGGGCUGGGUCGGUCGCGCUGGGGCGCGAAGCGGGGCUGGGCGCGCGCCG CGGCUGGACGAGGCGCCGCCGCCCCCCCCACGCCCGGGGCACCCCCCUCGCGGCCCUCCCCCGCCCCACCCCGCGCGCGC CGCUCGCUCCCUCCCCGCCCCGCGCCCUCUCUCUCUCUCUCUCCCCCGCUCCCCGUCCUCCCCCCUCCCCGGGGGAGCGC CGCGUGGGGGCGGCGGCGGGGGGAGAAGGGUCGGGGCGGCAGGGGCCGGCGGCGGCCCGCCGCGGGGCCCCGGCGGCGGG GGCACGGUCCCCCGCGAGGGGGGCCCGGGCACCCGGGGGGCCGGCGGCGGCGGCGACUCUGGACGCGAGCCGGGCCCUUC CCGUGGAUCGCCCCAGCUGCGGCGGGCGUCGCGGCCGCCCCCGGGGAGCCCGGCGGGCGCCGGCGCGCCCCCCCCCCCAC CCCACGUCUCGUCGCGCGCGCGUCCGCUGGGGGCGGGGAGCGGUCGGGCGGCGGCGGUCGGCGGGCGGCGGGGCGGGGCG GUUCGUCCCCCCGCCCUACCCCCCCGGCCCCGUCCGCCCCCCGUUCCCCCCUCCUCCUCGGCGCGCGGCGGCGGCGGCGG CAGGCGGCGGAGGGGCCGCGGGCCGGUCCCCCCCGCCGGGUCCGCCCCCGGGGCCGCGGUUCCGCGCGGCGCCUCGCCUC GGCCGGCGCCUAGCAGCCGACUUAGAACUGGUGCGGACCAGG(OMG)GAAUCCGAC(PSU)G(PSU)UUAAUUAAAACAA AGCAUCGCGAAGGCCC(OMG)CGGCGGGUGUUGACGCGAUGUGAUU(PSU)CUGCC(OMC)AGUGCUCUGAAUG(PSU)C A(A2M)AGUGAAGAAAUUCAAUGAAGCGCGG(OMG)UAAACGGCGGGAGUAACUAUGACUCUCUUAAGGUAGC(5MC)AA (A2M)UGCCUC(OMG)UCAUCUAAUUAGUGA(OMC)GCGCAUGAA(UY1)GGA(PSU)GA(A2M)CGAG(A2M)UUCCCA CUGU(OMC)CC(PSU)ACCUAC(PSU)AUCCAGCGAAACCAC(A2M)G(OMC)CAAGGGAACGGGCU(PSU)GG(OMC)G GAAUCAGCGG(OMG)GAAAGAAGACCCUGUUGAGC(PSU)UGAC(OMU)CUAGUCUGGCACGGUGAAGAGACAUGAGAGG UGUAGAAUAAGUGGGAGGCCCCCGGCGCCCCCCCGGUGUCCCCGCGAGGGGCCCGGGGCGGGGUCCGCCGGCCCUGCGGG CCGCCGGUGAAAUACCACUACUCUGAUCGUUUUUUCACUGACCCGGUGAGGCGGGGGGGCGAGCCCCGAGGGGCUCUCGC UUCUGGCGCCAAGCGCCCGGCCGCGCGCCGGCCGGGCGCGACCCGCUCCGGGGACAGUGCCAGGUGGGGAGUUUGACUG (OMG)GGCGGUACACCUGUCAAACGGUA(6MZ)CGCAGG(OMU)(OMG)UCCUAAGGCGAGCUCAGGGAGGACAGAAACC UCCCGUGGAGCAGAAGGGCAAAAGCUCGCUUGA(PSU)CU(PSU)GA(PSU)UUUCAG(OMU)ACGAA(PSU)ACAGACC GUGAAAGCGGGGCCUCACGAUCCUUCUGACCUU(PSU)UGGGUUU(PSU)AAGCAGGA(OMG)GUGUCAGAAAAGUUACC ACAG(OMG)GAUAACUGGC(PSU)UGUGGCGGCCAAGCGU(PSU)CA(PSU)AGCGACG(PSU)CGCUUUUUGA(PSU)C CUU(5MC)GAUGUCGG(OMC)(PSU)CUUCCUAUCAUUG(PSU)GAAGCAGAAUUCACCAAGCGU(PSU)(OMG)GAU (OMU)(OMG)(PSU)UCACCCACUAAUAGGGAACG(PSU)G(A2M)GCUGGG(UR3)U(PSU)AGA(OMC)CGUCGUGAG ACAGGU(PSU)AGUUUUACCCUACUGAUG(A2M)UGUG(PSU)UG(PSU)UGCCAUGGUAAUCCUGCUCAGUACGAGAGG AACCGCAG(OMG)U(OMU)CA(OMG)ACAU(PSU)UGGUGUAU(OMG)UGCUUGGCUGAGGAGCCAAUGGGGCGAAGCUA CCA(PSU)CUGUGGGAUUAUGAC(PSU)GAACGCCUCUAAGUCAGAAUCCCGCCCAGGCGGAACGAUACGGCAGCGCCGC GGAGCCUCGGUUGGCCUCGGAUAGCCGGUCCCCCGCCUGUCCCCGCCGGCGGGCCGCCCCCCCCCUCCACGCGCCCCGCG CGCGCGGGAGGGCGCGUGCCCCGCCGCGCGCCGGGACCGGGGUCCGGUGCGGAGUGCCCUUCGUCCUGGGAAACGGGGCG CGGCCGGAGAGGCGGCCGCCCCCUCGCCCGUCACGCACCGCACGUUCGUGGGGAACCUGGCGCUAAACCA(PSU)UCGUA GACGACCUGCUUCUGGGUCGGGG(PSU)UUCGUACGUAGCAGAGCAGCUCCCUCGCUGCGAUCUAUUGAAAGUCAGCCCU CGACACAAGGGUUUGU 5S rRNA Homo sapiens 0.038691913999999994 1 GUCUACGGCCAUACCACCCUGAACGCGCCCGAUCUCGUCUGAUCUCGGAAGCUAAGCAGGGUCGGGCCUGGUUAGUACUU GGAUGGGAGACCGCCUGGGAAUACCGGGUGCUGUAGGCUU X12811.1 5.8S rRNA Homo sapiens 0.050463839999999996 1 CGACUCUUAGCGGUGGAUCACUCGGCUCGUGCGUCGAUGAAGAACGCAGCUAGC(PSU)GCGAGAAUUAAUG(PSU)GAA UU(OMG)CAGGACACAUUGAUCAUCGACACUUCGAACGCACUUGCGGCCCCGGGUUCCUCCCGGGGCUACGCCUGUCUGA GCGUCGCUU U13369.1 Large ribosomal subunit protein uL2 Homo sapiens 0.028103854999999997 1 LEVO MGRVIRGQRKGAGSVFRAHVKHRKGAARLRAVDFAERHGYIKGIVKDIIHDPGRGAPLAKVVFRDPYRFKKRTELFIAAE GIHTGQFVYCGKKAQLNIGNVLPVGTMPEGTIVCCLEEKPGDRGKLARASGNYATVISHNPETKKTRVKLPSGSKKVISS ANRAVVGVVAGGGRIDKPILKAGRAYHKYKAKRNCWPRVRGVAMNPVEHPFGGGN(V5N)QHIGKPSTIRRDAPAGRKVG LIAARRTGRLRGTKTVQEKEN P62917 Large ribosomal subunit protein uL3 Homo sapiens 0.046224133 1 LEVO MSHRKFSAPRHGSLGFLPRKRSSRHRGKVKSFPKDDPSKPVHLTAFLGYKAGMTHIVREVDRPGSKVNKKEVVEAVTIVE TPPMVVVGIVGYVETPRGLRTFKTVFAEHISDECKRRFYKNWHKSKKKAFTKYCKKWQDEDGKKQLEKDFSSMKKYCQVI RVIAHTQMRLLPLRQKKAHLMEIQVNGGTVAEKLDWARERLEQQVPVNQVFGQDEMIDVIGVTKGKGYKGVTSRWHTKKL PRKT(HIC)RGLRKVACIGAWHPARVAFSVARAGQKGYHHRTEINKKIYKIGQGYLIKDGKLIKNNASTDYDLSDKSINP LGGFVHYGEVTNDFVMLKGCVVGTKKRVLTLRKSLLVQTKRRALEKIDLKFIDTTSKFGHGRFQTMEEKKAFMGPLKKDR IAKEEGA P39023 60S ribosomal protein L4 Homo sapiens 0.047804621 1 LEVO MACARPLISVYSEKGESSGKNVTLPAVFKAPIRPDIVNFVHTNLRKNNRQPYAVSELAGHQTSAESWGTGRAVARIPRVR GGGTHRSGQGAFGNMCRGGRMFAPTKTWRRWHRRVNTTQKRYAICSALAASALPALVMSKGHRIEEVPELPLVVEDKVEG YKKTKEAVLLLKKLKAWNDIKKVYASQRMRAGKGKMRNRRRIQRRGPCIIYNEDNGIIKAFRNIPGITLLNVSKLNILKL APGGHVGRFCIWTESAFRKLDELYGTWRKAASLKSNYNLPMHKMINTDLSRILKSPEIQRALRAPRKKIHRRVLKKNPLK NLRIMLKLNPYAKTMRRNTILRQARNHKLRVDKAAAAAAALQAKSDEKAAVAGKKPVVGKKGKKAAVGVKKQKKPLVGKK AAATKKPAPEKKPAEKKPTTEEKKPAA P36578 60S ribosomal protein L5 Homo sapiens 0.03442678899999999 1 LEVO MGFVKVVKNKAYFKRYQVKFRRRREGKTDYYARKRLVIQDKNKYNTPKYRMIVRVTNRDIICQIAYARIEGDMIVCAAYA HELPKYGVKVGLTNYAAAYCTGLLLARRLLNRFGMDKIYEGQVEVTGDEYNVESIDGQPGAFTCYLDAGLARTTTGNKVF GALKGAVDGGLSIPHSTKRFPGYDSESKEFNAEVHRKHIMGQNVADYMRYLMEEDEDAYKKQFSQYIKNSVTPDMMEEMY KKAHAAIRENPVYEKKPKKEVKKKRWNRPKMSLAQKKDRVAQKKASFLRAQERAAES P46777 60S ribosomal protein L6 Homo sapiens 0.032810175999999996 1 LEVO MAGEKVEKPDTKEKKPEAKKVDAGGKVKKGNLKAKKPKKGKPHCSRNPVLVRGIGRYSRSAMYSRKAMYKRKYSAAKSKV EKKKKEKVLATVTKPVGGDKNGGTRVVKLRKMPRYYPTEDVPRKLLSHGKKPFSQHVRKLRASITPGTILIILTGRHRGK RVVFLKQLASGLLLVTGPLVLNRVPLRRTHQKFVIATSTKIDISNVKIPKHLTDAYFKKKKLRKPRHQEGEIFDTEKEKY EITEQRKIDQKAVDSQILPKIKAIPQLQGYLRSVFALTNGIYPHKLVF Q02878 MAGNESIUM ION 2.4305e-05 186 MG 1,4-DIAMINOBUTANE 8.815099999999999e-05 7 PUT POTASSIUM ION 3.9098e-05 46 K ZINC ION 6.5409e-05 5 ZN SPERMIDINE 0.000145246 7 SPD SPERMINE 0.00020234 5 SPM ADENOSINE-5'-TRIPHOSPHATE 0.000507181 1 ATP water 1.8015e-05 11817 HOH singleParticle particle 0.4583 7.5 Quantifoil R2/2 COPPER 200 CARBON HOLEY 2.0 GLOW DISCHARGE 20 AIR 0.037

Operated at 15 mA, easiGlow Discharge Cleaning system (PELCO)

ETHANE 85 277 FEI VITROBOT MARK IV

Hela 60S ribosomal subunits were isolated from cytoplasmic extracts of Hela cells, involving puromycin treatment and sucrose gradient centrifugation in high salt. The gradients were manually fractionated, and separated peak fractions of 60S subunits were collected. For buffer exchange, the sample was diluted 6 x in buffer F (20 mM HEPES pH7.5, 10 mM KCl, 2 mM MgCl2, 2 mM DTT) supplemented with 8.56 % sucrose to adjust the sucrose in the storage buffer to 12%, respectively. Finally, the 60S subunit suspension was concentrated on Amicon Ultracel filter units with a 10 kDa cutoff (Merck Millipore) was snap frozen in 10 ul aliquots and stored at -80 degrees Celsius. Concentrated Hela 60S ribosomal subunits were diluted to 200 nM in buffer E (20 mM HEPES pH7.5, 2 mM MgCl2, 90 mM KCl, 0.5 mM Spermidine, 0.04 mM Spermine, 2 mM DTT) and 4 ul were spotted onto glow-discharged holey carbon grids coated with a continuous thin carbon film (Quantifoil Cu200 R2/2+) and incubated for 40 sec at 4 degrees CelsiusC, 85% RH. The excess of liquid was blotted away for 2 sec and the grids were plunge frozen using the Vitrobot Mark IV (Thermo Fischer Scientific).

FEI TITAN KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 50.0 2.7 0.5 2.5 105000.0 FEI TITAN KRIOS AUTOGRID HOLDER NITROGEN 80.0 82.0 GATAN K3 BIOQUANTUM (6k x 4k) 11520 8184 1 16983 49.0 1 1372803 Gctf 0.53 PHASE FLIPPING AND AMPLITUDE CORRECTION C1 BACK PROJECTION 1.78 FSC 0.143 CUT-OFF cryoSPARC 3.3 880876 MAXIMUM LIKELIHOOD cryoSPARC 3.3 MAXIMUM LIKELIHOOD cryoSPARC 3.3 cryoSPARC 3.1 6EKO PDB experimental model OTHER

Interactive model building was performed in Coot using an auto sharpened map in cryoSPARC and additionally a low-pass-filtered map to 4 Angstrom for the more mobile regions of the 60S structure. Each residue of the model was checked individually for modifications and adjusted manually with a subsequent refinement in phenix.refine. Polyamines and metals were added while searching for unmodelled blobs in Coot. Water molecules were added using phenix.douse and visually validated in Coot. The model was validated using Molprobity.

Cross-correlation coefficient REAL emd_18765_msk_1.map emd_18765_half_map_2.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 640 640 640 0 0 0 640 640 640 394.24 394.24 394.24 90.0 90.0 90.0 X Y Z -0.73389953 2.7612855 0.006450421 0.11467376 0.616 0.616 0.616 AUTHOR ::::EMDATABANK.org::::EMD-18765:::: Cryo-EM reconstruction of the HeLa large ribosomal subunit. (Half map A) emd_18765_half_map_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 640 640 640 0 0 0 640 640 640 394.24 394.24 394.24 90.0 90.0 90.0 X Y Z -0.921932 2.92765 0.006447657 0.1264456 0.616 0.616 0.616 AUTHOR ::::EMDATABANK.org::::EMD-18765:::: Cryo-EM reconstruction of the HeLa large ribosomal subunit. (Half map B)