7ABF: Human pre-Bact-1 spliceosome core structure

Human pre-Bact-1 spliceosome core structure. Determined by electron microscopy at 3.9 Å resolution. Released 9 Dec 2020.

Method
Electron microscopy
Resolution
3.9 Å
Organisms
Homo sapiens, synthetic construct
Chains
15
Atoms
25,904
Mol. weight
1005.87 kDa
Ligands
MG, GTP, IHP
Released
9 Dec 2020

Explore 7ABF in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

7ABF contains 145 α-helices and 118 β-strands across 12 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chain A: 62 helices, 43 β-strands

ElementResiduesLengthSheet
α-helix65-706
α-helix86-949
α-helix99-1024
α-helix109-1113
β-strand11713
β-strand118-12034
β-strand127-12934
α-helix137-15721
α-helix232-24211
α-helix260-26910
α-helix310-3156
α-helix317-3204
α-helix370-3712
α-helix375-3784
α-helix399-4057
α-helix441-45919
β-strand48314
β-strand48613
α-helix489-51022
β-strand516-51725
β-strand525-52625
α-helix544-56522
α-helix573-58614
α-helix598-61619
α-helix633-66028
α-helix678-69518
α-helix708-72114
α-helix733-76230
α-helix770-79627
α-helix803-82018
β-strand82516
α-helix835-85016
α-helix860-87213
α-helix874-88714
α-helix893-8942
β-strand89517
β-strand896-89838
β-strand907-90938
α-helix913-93321
β-strand94019
α-helix947-9482
α-helix949-9546
α-helix955-9606
β-strand973-98089
α-helix990-100011
β-strand100116
α-helix1003-101311
β-strand101817
α-helix1037-105216
α-helix1056-10627
α-helix1077-10815
β-strand1085-109069
β-strand1094-110189
α-helix1103-111614
α-helix1144-116017
β-strand1174-117859
β-strand1186-1188310
β-strand1193-1195310
β-strand1198111
β-strand1215-1217312
β-strand1224-1227412
β-strand1229-1231310
α-helix1234-124815
α-helix1256-127015
α-helix1276-12805
α-helix1282-129918
α-helix1314-13174
β-strand1334-1335213
α-helix13361
α-helix1337-13393
β-strand1341-1342214
β-strand1345115
β-strand1350115
β-strand1353-1354214
β-strand1362-1363213
α-helix1368-13714
α-helix1375-139925
α-helix1405-14084
α-helix1419-14224
α-helix1427-14315
α-helix1437-14426
α-helix1468-147710
α-helix1480-14845
α-helix1529-15379
α-helix1539-15424
β-strand1553-1554216
β-strand1561-1562216
α-helix1567-157610
α-helix1581-159919
β-strand1606-1611617
β-strand1629-1633517
β-strand1638118
β-strand1640-1644517
β-strand1656118
β-strand1659-1662417
β-strand1665-1667319
α-helix1671-16733
α-helix1676-168914
β-strand1700-1701217
β-strand1704-1706319
β-strand1711-1713319
β-strand1715-1718417
α-helix17191
α-helix1723-173412
α-helix1738-175114
Chain A4: 15 helices, 0 β-strands
ElementResiduesLengthSheet
α-helix700-72021
α-helix857-88731
α-helix888-8925
α-helix897-90913
α-helix918-9258
α-helix931-9344
α-helix939-96628
α-helix977-9804
α-helix983-9864
α-helix988-9914
α-helix997-102428
α-helix1032-10398
α-helix1042-10509
α-helix1055-10595
α-helix1064-107916
Chain G: 1 helix, 23 β-strands
ElementResiduesLengthSheet
α-helix191-1933
β-strand194-199634
β-strand210-212335
β-strand219-221335
β-strand228-231435
β-strand240-242335
β-strand251-254436
β-strand261-264436
β-strand291-296637
β-strand303-307537
β-strand312-313237
β-strand336-337238
β-strand346-347238
β-strand354-355239
β-strand367-368239
β-strand388140
β-strand397140
β-strand416-419441
β-strand429-431341
β-strand439142
β-strand446142
β-strand467-470434
β-strand476-480534
β-strand487-491534
Chain I: 11 helices, 4 β-strands
ElementResiduesLengthSheet
α-helix23-308
α-helix46-527
β-strand60-6121
β-strand66-6721
α-helix69-8012
α-helix84-918
α-helix98-10912
α-helix113-1208
α-helix121-1233
β-strand129-13352
β-strand139-14352
α-helix144-1529
α-helix161-1622
α-helix165-1673
α-helix168-1747
Chain K: 1 helix, 0 β-strands
ElementResiduesLengthSheet
α-helix272-31342
Chain N: 4 helices, 2 β-strands
ElementResiduesLengthSheet
β-strand80-81232
β-strand88-89232
α-helix93-997
α-helix103-1086
α-helix118-12811
α-helix129-1335
Chain q: 2 helices, 4 β-strands
ElementResiduesLengthSheet
β-strand4-7433
β-strand14-16333
α-helix25-3511
β-strand42-45433
α-helix57-604
β-strand68-72533
Chain Q: 7 helices, 0 β-strands
ElementResiduesLengthSheet
α-helix13-153
α-helix19-3315
α-helix44-463
α-helix47-6115
α-helix62-665
α-helix74-807
α-helix86-938

4 more chain groups are not listed. Open the entry in the viewer and use the sequence panel to see them.

Molecules and chains

MoleculeChainsTypeLengthOrganismUniProt
Protein BUD31 homologQprotein144Homo sapiensP41223 (AlphaFold model)
Pre-mRNA-splicing factor 38AIprotein312Homo sapiensQ8NAV1 (AlphaFold model)
Pre-mRNA-processing-splicing factor 8Aprotein2335Homo sapiensQ6P2Q9 (AlphaFold model)
116 kDa U5 small nuclear ribonucleoprotein componentrprotein972Homo sapiensQ15029 (AlphaFold model)
Zinc finger matrin-type protein 2Nprotein199Homo sapiensQ96NC0
Ubiquitin-like protein 5qprotein73Homo sapiensQ9BZL1
Spliceosome-associated protein CWC15 homologRprotein229Homo sapiensQ9P013
U5 small nuclear RNA5RNA116Homo sapiens
U6 small nuclear RNA6RNA106Homo sapiens
WW domain-binding protein 11Xprotein641Homo sapiensQ9Y2W2
SNW domain-containing protein 1vprotein536Homo sapiensQ13573
Pleiotropic regulator 1Gprotein514Homo sapiensO43660

3 more molecules are not listed.

Sequence of entity 1 (Q), FASTA
>7ABF_1 Protein BUD31 homolog (chains Q)
MPKVKRSRKAPPDGWELIEPTLDELDQKMREAETEPHEGKRKVESLWPIFRIHHQKTRYI
FDLFYKRKAISRELYEYCIKEGYADKNLIAKWKKQGYENLCCLRCIQTRDTNFGTNCICR
VPKSKLEVGRIIECTHCGCRGCSG
Sequence of entity 2 (I), FASTA
>7ABF_2 Pre-mRNA-splicing factor 38A (chains I)
MANRTVKDAHSIHGTNPQYLVEKIIRTRIYESKYWKEECFGLTAELVVDKAMELRFVGGV
YGGNIKPTPFLCLTLKMLQIQPEKDIIVEFIKNEDFKYVRMLGALYMRLTGTAIDCYKYL
EPLYNDYRKIKSQNRNGEFELMHVDEFIDELLHSERVCDIILPRLQKRYVLEEAEQLEPR
VSALEEDMDDVESSEEEEEEDEKLERVPSPDHRRRSYRDLDKPRRSPTLRYRRSRSRSPR
RRSRSPKRRSPSPRRERHRSKSPRRHRSRSRDRRHRSRSKSPGHHRSHRHRSHSKSPERS
KKSHKKSRRGNE
Sequence of entity 3 (A), FASTA
>7ABF_3 Pre-mRNA-processing-splicing factor 8 (chains A)
MAGVFPYRGPGNPVPGPLAPLPDYMSEEKLQEKARKWQQLQAKRYAEKRKFGFVDAQKED
MPPEHVRKIIRDHGDMTNRKFRHDKRVYLGALKYMPHAVLKLLENMPMPWEQIRDVPVLY
HITGAISFVNEIPWVIEPVYISQWGSMWIMMRREKRDRRHFKRMRFPPFDDEEPPLDYAD
NILDVEPLEAIQLELDPEEDAPVLDWFYDHQPLRDSRKYVNGSTYQRWQFTLPMMSTLYR
LANQLLTDLVDDNYFYLFDLKAFFTSKALNMAIPGGPKFEPLVRDINLQDEDWNEFNDIN
KIIIRQPIRTEYKIAFPYLYNNLPHHVHLTWYHTPNVVFIKTEDPDLPAFYFDPLINPIS
HRHSVKSQEPLPDDDEEFELPEFVEPFLKDTPLYTDNTANGIALLWAPRPFNLRSGRTRR
ALDIPLVKNWYREHCPAGQPVKVRVSYQKLLKYYVLNALKHRPPKAQKKRYLFRSFKATK
FFQSTKLDWVEVGLQVCRQGYNMLNLLIHRKNLNYLHLDYNFNLKPVKTLTTKERKKSRF
GNAFHLCREVLRLTKLVVDSHVQYRLGNVDAFQLADGLQYIFAHVGQLTGMYRYKYKLMR
QIRMCKDLKHLIYYRFNTGPVGKGPGCGFWAAGWRVWLFFMRGITPLLERWLGNLLARQF
EGRHSKGVAKTVTKQRVESHFDLELRAAVMHDILDMMPEGIKQNKARTILQHLSEAWRCW
KANIPWKVPGLPTPIENMILRYVKAKADWWTNTAHYNRERIRRGATVDKTVCKKNLGRLT
RLYLKAEQERQHNYLKDGPYITAEEAVAVYTTTVHWLESRRFSPIPFPPLSYKHDTKLLI
LALERLKEAYSVKSRLNQSQREELGLIEQAYDNPHEALSRIKRHLLTQRAFKEVGIEFMD
LYSHLVPVYDVEPLEKITDAYLDQYLWYEADKRRLFPPWIKPADTEPPPLLVYKWCQGIN
NLQDVWETSEGECNVMLESRFEKMYEKIDLTLLNRLLRLIVDHNIADYMTAKNNVVINYK
DMNHTNSYGIIRGLQFASFIVQYYGLVMDLLVLGLHRASEMAGPPQMPNDFLSFQDIATE
AAHPIRLFCRYIDRIHIFFRFTADEARDLIQRYLTEHPDPNNENIVGYNNKKCWPRDARM
RLMKHDVNLGRAVFWDIKNRLPRSVTTVQWENSFVSVYSKDNPNLLFNMCGFECRILPKC
RTSYEEFTHKDGVWNLQNEVTKERTAQCFLRVDDESMQRFHNRVRQILMASGSTTFTKIV
NKWNTALIGLMTYFREAVVNTQELLDLLVKCENKIQTRIKIGLNSKMPSRFPPVVFYTPK
ELGGLGMLSMGHVLIPQSDLRWSKQTDVGITHFRSGMSHEEDQLIPNLYRYIQPWESEFI
DSQRVWAEYALKRQEAIAQNRRLTLEDLEDSWDRGIPRINTLFQKDRHTLAYDKGWRVRT
DFKQYQVLKQNPFWWTHQRHDGKLWNLNNYRTDMIQALGGVEGILEHTLFKGTYFPTWEG
LFWEKASGFEESMKWKKLTNAQRSGLNQIPNRRFTLWWSPTINRANVYVGFQVQLDLTGI
FMHGKIPTLKISLIQIFRAHLWQKIHESIVMDLCQVFDQELDALEIETVQKETIHPRKSY
KMNSSCADILLFASYKWNVSRPSLLADSKDVMDSTTTQKYWIDIQLRWGDYDSHDIERYA
RAKFLDYTTDNMSIYPSPTGVLIAIDLAYNLHSAYGNWFPGSKPLIQQAMAKIMKANPAL
YVLRERIRKGLQLYSSEPTEPYLSSQNYGELFSNQIIWFVDDTNVYRVTIHKTFEGNLTT
KPINGAIFIFNPRTGQLFLKIIHTSVWAGQKRLGQLAKWKTAEEVAALIRSLPVEEQPKQ
IIVTRKGMLDPLEVHLLDFPNIVIKGSELQLPFQACLKVEKFGDLILKATEPQMVLFNLY
DDWLKTISSYTAFSRLILILRALHVNNDRAKVILKPDKTTITEPHHIWPTLTDEEWIKVE
VQLKDLILADYGKKNNVNVASLTQSEIRDIILGMEISAPSQQRQQIAEIEKQTKEQSQLT
ATQTRTVNKHGDEIITSTTSNYETQTFSSKTEWRVRAISAANLHLRTNHIYVSSDDIKET
GYTYILPKNVLKKFICISDLRAQIAGYLYGVSPPDNPQVKEIRCIVMVPQWGTHQTVHLP
GQLPQHEYLKEMEPLGWIHTQPNESPQLSPQDVTTHAKIMADNPSWDGEKTIIITCSFTP
GSCTLTAYKLTPSGYEWGRQNTDKGNNPKGYLPSHYERVQMLLSDRFLGFFMVPAQSSWN
YNFMGVRHDPNMKYELQLANPKEFYHEVHRPSHFLNFALLQEGEVYSADREDLYA
Sequence of entity 4 (r), FASTA
>7ABF_4 116 kDa U5 small nuclear ribonucleoprotein component (chains r)
MDTDLYDEFGNYIGPELDSDEDDDELGRETKDLDEMDDDDDDDDVGDHDDDHPGMEVVLH
EDKKYYPTAEEVYGPEVETIVQEEDTQPLTEPIIKPVKTKKFTLMEQTLPVTVYEMDFLA
DLMDNSELIRNVTLCGHLHHGKTCFVDCLIEQTHPEIRKRYDQDLCYTDILFTEQERGVG
IKSTPVTVVLPDTKGKSYLFNIMDTPGHVNFSDEVTAGLRISDGVVLFIDAAEGVMLNTE
RLIKHAVQERLAVTVCINKIDRLILELKLPPTDAYYKLRHIVDEVNGLISMYSTDENLIL
SPLLGNVCFSSSQYSICFTLGSFAKIYADTFGDINYQEFAKRLWGDIYFNPKTRKFTKKA
PTSSSQRSFVEFILEPLYKILAQVVGDVDTSLPRTLDELGIHLTKEELKLNIRPLLRLVC
KKFFGEFTGFVDMCVQHIPSPKVGAKPKIEHTYTGGVDSDLGEAMSDCDPDGPLMCHTTK
MYSTDDGVQFHAFGRVLSGTIHAGQPVKVLGENYTLEDEEDSQICTVGRLWISVARYHIE
VNRVPAGNWVLIEGVDQPIVKTATITEPRGNEEAQIFRPLKFNTTSVIKIAVEPVNPSEL
PKMLDGLRKVNKSYPSLTTKVEESGEHVILGTGELYLDCVMHDLRKMYSEIDIKVADPVV
TFCETVVETSSLKCFAETPNKKNKITMIAEPLEKGLAEDIENEVVQITWNRKKLGEFFQT
KYDWDLLAARSIWAFGPDATGPNILVDDTLPSEVDKALLGSVKDSIVQGFQWGTREGPLC
DELIRNVKFKILDAVVAQEPLHRGGGQIIPTARRVVYSAFLMATPRLMEPYYFVEVQAPA
DCVSAVYTVLARRRGHVTQDAPIPGSPLYTIKAFIPAIDSFGFETDLRTHTQGQAFSLSV
FHHWQIVPGDPLDKSIVIRPLEPQPAPHLAREFMIKTRRRKGLSEDVSISKFFDDPMLLE
LAKQDVVLNYPM
Sequence of entity 5 (N), FASTA
>7ABF_5 Zinc finger matrin-type protein 2 (chains N)
MASGSGTKNLDFRRKWDKDEYEKLAEKRLTEEREKKDGKPVQPVKRELLRHRDYKVDLES
KLGKTIVITKTTPQSEMGGYYCNVCDCVVKDSINFLDHINGKKHQRNLGMSMRVERSTLD
QVKKRFEVNKKKMEEKQKDYDFEERMKELREEEEKAKAYKKEKQKEKKRRAEEDLTFEED
DEMAAVMGFSGFGSTKKSY
Sequence of entity 6 (q), FASTA
>7ABF_6 Ubiquitin-like protein 5 (chains q)
MIEVVCNDRLGKKVRVKCNTDDTIGDLKKLIAAQTGTRWNKIVLKKWYTIFKDHVSLGDY
EIHDGMNLELYYQ
Sequence of entity 7 (R), FASTA
>7ABF_7 Spliceosome-associated protein CWC15 homolog (chains R)
MTTAARPTFEPARGGRGKGEGDLSQLSKQYSSRDLPSHTKIKYRQTTQDAPEEVRNRDFR
RELEERERAAAREKNRDRPTREHTTSSSVSKKPRLDQIPAANLDADDPLTDEEDEDFEEE
SDDDDTAALLAELEKIKKERAEEQARKEQEQKAEEERIRMENILSGNPLLNLTGPSQPQA
NFKVKRRWDDDVVFKNCAKGVDDQKKDKRFVNDTLRSEFHKKFMEKYIK
Sequence of entity 8 (5), FASTA
>7ABF_8 U5 small nuclear RNA (chains 5)
AUACUCUGGUUUCUCUUCAGAUCGCAUAAAUCUUUCGCCUUUUACUAAAGAUUUCCGUGG
AGAGGAACAACUCUGAGUCUUAACCCAAUUUUUUGAGCCUUGCCUUGGCAAGGCUA
Sequence of entity 9 (6), FASTA
>7ABF_9 U6 small nuclear RNA (chains 6)
GUGCUCGCUUCGGCAGCACAUAUACUAAAAUUGGAACGAUACAGAGAAGAUUAGCAUGGC
CCCUGCGCAAGGAUGACACGCAAAUUCGUGAAGCGUUCCAUAUUUU
Sequence of entity 10 (X), FASTA
>7ABF_10 WW domain-binding protein 11 (chains X)
MGRRSTSSTKSGKFMNPTDQARKEARKRELKKNKKQRMMVRAAVLKMKDPKQIIRDMEKL
DEMEFNPVQQPQLNEKVLKDKRKKLRETFERILRLYEKENPDIYKELRKLEVEYEQKRAQ
LSQYFDAVKNAQHVEVESIPLPDMPHAPSNILIQDIPLPGAQPPSILKKTSAYGPPTRAV
SILPLLGHGVPRLPPGRKPPGPPPGPPPPQVVQMYGRKVGFALDLPPRRRDEDMLYSPEL
AQRGHDDDVSSTSEDDGYPEDMDQDKHDDSTDDSDTDKSDGESDGDEFVHRDNGERDNNE
EKKSGLSVRFADMPGKSRKKKKNMKELTPLQAMMLRMAGQEIPEEGREVEEFSEDDDEDD
SDDSEAEKQSQKQHKEESHSDGTSTASSQQQAPPQSVPPSQIQAPPMPGPPPLGPPPAPP
LRPPGPPTGLPPGPPPGAPPFLRPPGMPGLRGPLPRLLPPGPPPGRPPGPPPGPPPGLPP
GPPPRGPPPRLPPPAPPGIPPPRPGMMRPPLVPPLGPAPPGLFPPAPLPNPGVLSAPPNL
IQRPKADDTSAATIEKKATATISAKPQITNPKAEITRFVPTALRVRRENKGATAAPQRKS
EDDSAVPLAKAAPKSGPSVPVSVQTKDDVYEAFMKEMEGLL
Sequence of entity 11 (v), FASTA
>7ABF_11 SNW domain-containing protein 1 (chains v)
MALTSFLPAPTQLSQDQLEAEEKARSQRSRQTSLVSSRREPPPYGYRKGWIPRLLEDFGD
GGAFPEIHVAQYPLDMGRKKKMSNALAIQVDSEGKIKYDAIARQGQSKDKVIYSKYTDLV
PKEVMNADDPDLQRPDEEAIKEITEKTRVALEKSVSQKVAAAMPVRAADKLAPAQYIRYT
PSQQGVAFNSGAKQRVIRMVEMQKDPMEPPRFKINKKIPRGPPSPPAPVMHSPSRKMTVK
EQQEWKIPPCISNWKNAKGYTIPLDKRLAADGRGLQTVHINENFAKLAEALYIADRKARE
AVEMRAQVERKMAQKEKEKHEEKLREMAQKARERRAGIKTHVEKEDGEARERDEIRHDRR
KERQHDRNLSRAAPDKRSKLQRNENRDISEVIALGVPNPRTSNEVQYDQRLFNQSKGMDS
GFAGGEDEIYNVYDQAWRGGKDMAQSIYRPSKNLDKDMYGDDLEARIKTNRFVPDKEFSG
SDRRQRGREGPVQFEEDPFGLDKFLEEAKQHGGSKRPSDSSRPKEHEHEGKKRRKE
Sequence of entity 12 (G), FASTA
>7ABF_12 Pleiotropic regulator 1 (chains G)
MVEEVQKHSVHTLVFRSLKRTHDMFVADNGKPVPLDEESHKRKMAIKLRNEYGPVLHMPT
SKENLKEKGPQNATDSYVHKQYPANQGQEVEYFVAGTHPYPPGPGVALTADTKIQRMPSE
SAAQSLAVALPLQTKADANRTAPSGSEYRHPGASDRPQPTAMNSIVMETGNTKNSALMAK
KAPTMPKPQWHPPWKLYRVISGHLGWVRCIAVEPGNQWFVTGSADRTIKIWDLASGKLKL
SLTGHISTVRGVIVSTRSPYLFSCGEDKQVKCWDLEYNKVIRHYHGHLSAVYGLDLHPTI
DVLVTCSRDSTARIWDVRTKASVHTLSGHTNAVATVRCQAAEPQIITGSHDTTIRLWDLV
AGKTRVTLTNHKKSVRAVVLHPRHYTFASGSPDNIKQWKFPDGSFIQNLSGHNAIINTLT
VNSDGVLVSGADNGTMHLWDWRTGYNFQRVHAAVQPGSLDSESGIFACAFDQSESRLLTA
EADKTIKVYREDDTATEETHPVSWKPEIIKRKRF

Ligands and cofactors

IDNameFormulaCopies
MGMagnesium ionMg1
GTPGuanosine-5'-triphosphateC10 H16 N5 O14 P31
IHPInositol hexakisphosphateC6 H18 O24 P61

Primary citation

Mechanism of protein-guided folding of the active site U2/U6 RNA during spliceosome activation. Townsend, C., Leelaram, M.N., Agafonov, D.E. et al. Science (2020) 370. DOI 10.1126/science.abc3753 · PubMed

Other PDB entries of the same protein (UniProt P41223 (AlphaFold model), which also has an AlphaFold model), best resolution first:

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