8H6K: Pre-mRNA-processing-splicing factor 8

Cryo-EM structure of human exon-defined spliceosome in the mature B state. Determined by electron microscopy at 2.7 Å resolution. Released 1 May 2024.

Method
Electron microscopy
Resolution
2.7 Å
Organism
Homo sapiens
Chains
63
Atoms
98,459
Mol. weight
2629.83 kDa
Ligands
IHP, GTP, MG, ZN
Released
1 May 2024

Explore 8H6K in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

8H6K contains 628 α-helices and 648 β-strands across 58 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.

Chains 2a and 5a: 3 helices, 5 β-strands

ElementResiduesLengthSheet
α-helix7-104
β-strand16-21673
β-strand26-33873
β-strand40-48973
β-strand64-72973
α-helix74-763
β-strand77-84873
α-helix85-873
Chains 2b and 5b: 4 helices, 5 β-strands
ElementResiduesLengthSheet
α-helix3-86
β-strand14-19673
β-strand24-32973
β-strand38-46973
β-strand53-60873
α-helix62-643
β-strand65-69573
α-helix70-712
α-helix76-794
Chain 2B: 8 helices, 10 β-strands
ElementResiduesLengthSheet
α-helix6-105
β-strand14-16397
β-strand22-25497
α-helix37-404
β-strand46-48397
β-strand56-57298
β-strand68-70397
β-strand78-79298
α-helix83-864
β-strand92-94397
α-helix103-1119
β-strand117-119397
α-helix124-1274
α-helix131-1388
β-strand144-145297
β-strand148-149297
α-helix150-1512
α-helix152-1609
Chain 2c: 3 helices, 5 β-strands
ElementResiduesLengthSheet
α-helix21-266
α-helix30-389
β-strand41-46673
β-strand51-59973
β-strand65-751173
β-strand91-1011173
α-helix103-1053
β-strand106-111673
Chain 2C: 3 helices, 6 β-strands
ElementResiduesLengthSheet
β-strand8-12599
α-helix20-3213
β-strand37-41599
β-strand52-56599
α-helix59-6810
β-strand73-742100
β-strand77-782100
β-strand80-83499
α-helix89-957
Chains 2d and 5d: 2 helices, 5 β-strands
ElementResiduesLengthSheet
α-helix7-148
β-strand18-23673
β-strand28-36973
β-strand42-511073
β-strand54-641173
α-helix66-683
β-strand69-74673
Chain 2D: 9 helices, 3 β-strands
ElementResiduesLengthSheet
α-helix161-17414
α-helix179-18911
α-helix192-1987
α-helix205-21814
α-helix241-27232
β-strand281-2844101
β-strand4121102
β-strand4191102
α-helix422-43110
α-helix437-45014
α-helix457-4582
α-helix459-47113
Chains 2e and 5e: 2 helices, 5 β-strands
ElementResiduesLengthSheet
α-helix17-2711
β-strand30-35673
β-strand38-501373
β-strand56-651073
β-strand70-791073
α-helix81-833
β-strand84-90773

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

Molecules and chains

MoleculeChainsTypeLengthOrganismUniProt
pre-mRNAARNA144Homo sapiens
U5 snRNA5ARNA117Homo sapiens
Pre-mRNA-processing-splicing factor 85Bprotein2335Homo sapiensQ6P2Q9 (AlphaFold model)
116 kDa U5 small nuclear ribonucleoprotein component5Cprotein972Homo sapiensQ15029 (AlphaFold model)
U5 small nuclear ribonucleoprotein 200 kDa helicase5Dprotein2136Homo sapiensO75643 (AlphaFold model)
U5 small nuclear ribonucleoprotein 40 kDa protein5Eprotein357Homo sapiensQ96DI7 (AlphaFold model)
Isoform SM-B of Small nuclear ribonucleoprotein-associated proteins B and B'2a, 4a, 5aprotein231Homo sapiensP14678
Small nuclear ribonucleoprotein Sm D12b, 4b, 5bprotein119Homo sapiensP62314
Small nuclear ribonucleoprotein Sm D22c, 4c, 5cprotein118Homo sapiensP62316
Small nuclear ribonucleoprotein F2d, 4d, 5dprotein86Homo sapiensP62306
Small nuclear ribonucleoprotein E2e, 4e, 5eprotein92Homo sapiensP62304
Small nuclear ribonucleoprotein G2f, 4f, 5fprotein76Homo sapiensP62308

37 more molecules are not listed.

Sequence of entity 1 (A), FASTA
>8H6K_1 pre-mRNA (chains A)
GGGAGGUUUCCUUGAAGCUUUCGUGCUGACCCUGUCCCUUUUUUUUCCACAGGGGCGAAU
UCGAGCUCACUCUCUUCCGCAUCGCUGUCUGCGAGGUACCCUACCAGGUGAGUAUGGAUC
CCUCUAAAAGCGGGCAUGACUUCU
Sequence of entity 2 (5A), FASTA
>8H6K_2 U5 snRNA (chains 5A)
AUACUCUGGUUUCUCUUCAGAUCGCAUAAAUCUUUCGCCUUUUACUAAAGAUUUCCGUGG
AGAGGAACAACUCUGAGUCUUAACCCAAUUUUUUGAGGCCUUGCUUUGGCAAGGCUA
Sequence of entity 3 (5B), FASTA
>8H6K_3 Pre-mRNA-processing-splicing factor 8 (chains 5B)
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 (5C), FASTA
>8H6K_4 116 kDa U5 small nuclear ribonucleoprotein component (chains 5C)
MDTDLYDEFGNYIGPELDSDEDDDELGRETKDLDEMDDDDDDDDVGDHDDDHPGMEVVLH
EDKKYYPTAEEVYGPEVETIVQEEDTQPLTEPIIKPVKTKKFTLMEQTLPVTVYEMDFLA
DLMDNSELIRNVTLCGHLHHGKTCFVDCLIEQTHPEIRKRYDQDLCYTDILFTEQERGVG
IKSTPVTVVLPDTKGKSYLFNIMDTPGHVNFSDEVTAGLRISDGVVLFIDAAEGVMLNTE
RLIKHAVQERLAVTVCINKIDRLILELKLPPTDAYYKLRHIVDEVNGLISMYSTDENLIL
SPLLGNVCFSSSQYSICFTLGSFAKIYADTFGDINYQEFAKRLWGDIYFNPKTRKFTKKA
PTSSSQRSFVEFILEPLYKILAQVVGDVDTSLPRTLDELGIHLTKEELKLNIRPLLRLVC
KKFFGEFTGFVDMCVQHIPSPKVGAKPKIEHTYTGGVDSDLGEAMSDCDPDGPLMCHTTK
MYSTDDGVQFHAFGRVLSGTIHAGQPVKVLGENYTLEDEEDSQICTVGRLWISVARYHIE
VNRVPAGNWVLIEGVDQPIVKTATITEPRGNEEAQIFRPLKFNTTSVIKIAVEPVNPSEL
PKMLDGLRKVNKSYPSLTTKVEESGEHVILGTGELYLDCVMHDLRKMYSEIDIKVADPVV
TFCETVVETSSLKCFAETPNKKNKITMIAEPLEKGLAEDIENEVVQITWNRKKLGEFFQT
KYDWDLLAARSIWAFGPDATGPNILVDDTLPSEVDKALLGSVKDSIVQGFQWGTREGPLC
DELIRNVKFKILDAVVAQEPLHRGGGQIIPTARRVVYSAFLMATPRLMEPYYFVEVQAPA
DCVSAVYTVLARRRGHVTQDAPIPGSPLYTIKAFIPAIDSFGFETDLRTHTQGQAFSLSV
FHHWQIVPGDPLDKSIVIRPLEPQPAPHLAREFMIKTRRRKGLSEDVSISKFFDDPMLLE
LAKQDVVLNYPM
Sequence of entity 5 (5D), FASTA
>8H6K_5 U5 small nuclear ribonucleoprotein 200 kDa helicase (chains 5D)
MADVTARSLQYEYKANSNLVLQADRSLIDRTRRDEPTGEVLSLVGKLEGTRMGDKAQRTK
PQMQEERRAKRRKRDEDRHDINKMKGYTLLSEGIDEMVGIIYKPKTKETRETYEVLLSFI
QAALGDQPRDILCGAADEVLAVLKNEKLRDKERRKEIDLLLGQTDDTRYHVLVNLGKKIT
DYGGDKEIQNMDDNIDETYGVNVQFESDEEEGDEDVYGEVREEASDDDMEGDEAVVRCTL
SANLVASGELMSSKKKDLHPRDIDAFWLQRQLSRFYDDAIVSQKKADEVLEILKTASDDR
ECENQLVLLLGFNTFDFIKVLRQHRMMILYCTLLASAQSEAEKERIMGKMEADPELSKFL
YQLHETEKEDLIREERSRRERVRQSRMDTDLETMDLDQGGEALAPRQVLDLEDLVFTQGS
HFMANKRCQLPDGSFRRQRKGYEEVHVPALKPKPFGSEEQLLPVEKLPKYAQAGFEGFKT
LNRIQSKLYRAALETDENLLLCAPTGAGKTNVALMCMLREIGKHINMDGTINVDDFKIIY
IAPMRSLVQEMVGSFGKRLATYGITVAELTGDHQLCKEEISATQIIVCTPEKWDIITRKG
GERTYTQLVRLIILDEIHLLHDDRGPVLEALVARAIRNIEMTQEDVRLIGLSATLPNYED
VATFLRVDPAKGLFYFDNSFRPVPLEQTYVGITEKKAIKRFQIMNEIVYEKIMEHAGKNQ
VLVFVHSRKETGKTARAIRDMCLEKDTLGLFLREGSASTEVLRTEAEQCKNLELKDLLPY
GFAIHHAGMTRVDRTLVEDLFADKHIQVLVSTATLAWGVNLPAHTVIIKGTQVYSPEKGR
WTELGALDILQMLGRAGRPQYDTKGEGILITSHGELQYYLSLLNQQLPIESQMVSKLPDM
LNAEIVLGNVQNAKDAVNWLGYAYLYIRMLRSPTLYGISHDDLKGDPLLDQRRLDLVHTA
ALMLDKNNLVKYDKKTGNFQVTELGRIASHYYITNDTVQTYNQLLKPTLSEIELFRVFSL
SSEFKNITVREEEKLELQKLLERVPIPVKESIEEPSAKINVLLQAFISQLKLEGFALMAD
MVYVTQSAGRLMRAIFEIVLNRGWAQLTDKTLNLCKMIDKRMWQSMCPLRQFRKLPEEVV
KKIEKKNFPFERLYDLNHNEIGELIRMPKMGKTIHKYVHLFPKLELSVHLQPITRSTLKV
ELTITPDFQWDEKVHGSSEAFWILVEDVDSEVILHHEYFLLKAKYAQDEHLITFFVPVFE
PLPPQYFIRVVSDRWLSCETQLPVSFRHLILPEKYPPPTELLDLQPLPVSALRNSAFESL
YQDKFPFFNPIQTQVFNTVYNSDDNVFVGAPTGSGKTICAEFAILRMLLQSSEGRCVYIT
PMEALAEQVYMDWYEKFQDRLNKKVVLLTGETSTDLKLLGKGNIIISTPEKWDILSRRWK
QRKNVQNINLFVVDEVHLIGGENGPVLEVICSRMRYISSQIERPIRIVALSSSLSNAKDV
AHWLGCSATSTFNFHPNVRPVPLELHIQGFNISHTQTRLLSMAKPVYHAITKHSPKKPVI
VFVPSRKQTRLTAIDILTTCAADIQRQRFLHCTEKDLIPYLEKLSDSTLKETLLNGVGYL
HEGLSPMERRLVEQLFSSGAIQVVVASRSLCWGMNVAAHLVIIMDTQYYNGKIHAYVDYP
IYDVLQMVGHANRPLQDDEGRCVIMCQGSKKDFFKKFLYEPLPVESHLDHCMHDHFNAEI
VTKTIENKQDAVDYLTWTFLYRRMTQNPNYYNLQGISHRHLSDHLSELVEQTLSDLEQSK
CISIEDEMDVAPLNLGMIAAYYYINYTTIELFSMSLNAKTKVRGLIEIISNAAEYENIPI
RHHEDNLLRQLAQKVPHKLNNPKFNDPHVKTNLLLQAHLSRMQLSAELQSDTEEILSKAI
RLIQACVDVLSSNGWLSPALAAMELAQMVTQAMWSKDSYLKQLPHFTSEHIKRCTDKGVE
SVFDIMEMEDEERNALLQLTDSQIADVARFCNRYPNIELSYEVVDKDSIRSGGPVVVLVQ
LEREEEVTGPVIAPLFPQKREEGWWVVIGDAKSNSLISIKRLTLQQKAKVKLDFVAPATG
AHNYTLYFMSDAYMGCDQEYKFSVDVKEAETDSDSD
Sequence of entity 6 (5E), FASTA
>8H6K_6 U5 small nuclear ribonucleoprotein 40 kDa protein (chains 5E)
MIEQQKRKGPELPLVPVKRQRHELLLGAGSGPGAGQQQATPGALLQAGPPRCSSLQAPIM
LLSGHEGEVYCCKFHPNGSTLASAGFDRLILLWNVYGDCDNYATLKGHSGAVMELHYNTD
GSMLFSASTDKTVAVWDSETGERVKRLKGHTSFVNSCYPARRGPQLVCTGSDDGTVKLWD
IRKKAAIQTFQNTYQVLAVTFNDTSDQIISGGIDNDIKVWDLRQNKLTYTMRGHADSVTG
LSLSSEGSYLLSNAMDNTVRVWDVRPFAPKERCVKIFQGNVHNFEKNLLRCSWSPDGSKI
AAGSADRFVYVWDTTSRRILYKLPGHAGSINEVAFHPDEPIIISASSDKRLYMGEIQ
Sequence of entity 7 (2a, 4a, 5a), FASTA
>8H6K_7 Isoform SM-B of Small nuclear ribonucleoprotein-associated proteins B and B' (chains 2a, 4a, 5a)
MTVGKSSKMLQHIDYRMRCILQDGRIFIGTFKAFDKHMNLILCDCDEFRKIKPKNSKQAE
REEKRVLGLVLLRGENLVSMTVEGPPPKDTGIARVPLAGAAGGPGIGRAAGRGIPAGVPM
PQAPAGLAGPVRGVGGPSQQVMTPQGRGTVAAAAAAATASIAGAPTQYPPGRGGPPPPMG
RGAPPPGMMGPPPGMRPPMGPPMGIPPGRGTPMGMPPPGMRPPPPGMRGLL
Sequence of entity 8 (2b, 4b, 5b), FASTA
>8H6K_8 Small nuclear ribonucleoprotein Sm D1 (chains 2b, 4b, 5b)
MKLVRFLMKLSHETVTIELKNGTQVHGTITGVDVSMNTHLKAVKMTLKNREPVQLETLSI
RGNNIRYFILPDSLPLDTLLVDVEPKVKSKKREAVAGRGRGRGRGRGRGRGRGRGGPRR
Sequence of entity 9 (2c, 4c, 5c), FASTA
>8H6K_9 Small nuclear ribonucleoprotein Sm D2 (chains 2c, 4c, 5c)
MSLLNKPKSEMTPEELQKREEEEFNTGPLSVLTQSVKNNTQVLINCRNNKKLLGRVKAFD
RHCNMVLENVKEMWTEVPKSGKGKKKSKPVNKDRYISKMFLRGDSVIVVLRNPLIAGK
Sequence of entity 10 (2d, 4d, 5d), FASTA
>8H6K_10 Small nuclear ribonucleoprotein F (chains 2d, 4d, 5d)
MSLPLNPKPFLNGLTGKPVMVKLKWGMEYKGYLVSVDGYMNMQLANTEEYIDGALSGHLG
EVLIRCNNVLYIRGVEEEEEDGEMRE
Sequence of entity 11 (2e, 4e, 5e), FASTA
>8H6K_11 Small nuclear ribonucleoprotein E (chains 2e, 4e, 5e)
MAYRGQGQKVQKVMVQPINLIFRYLQNRSRIQVWLYEQVNMRIEGCIIGFDEYMNLVLDD
AEEIHSKTKSRKQLGRIMLKGDNITLLQSVSN
Sequence of entity 12 (2f, 4f, 5f), FASTA
>8H6K_12 Small nuclear ribonucleoprotein G (chains 2f, 4f, 5f)
MSKAHPPELKKFMDKKLSLKLNGGRHVQGILRGFDPFMNLVIDECVEMATSGQQNNIGMV
VIRGNSIIMLEALERV

Ligands and cofactors

IDNameFormulaCopies
IHPInositol hexakisphosphateC6 H18 O24 P61
GTPGuanosine-5'-triphosphateC10 H16 N5 O14 P31
MGMagnesium ionMg1
ZNZinc ionZn2

Primary citation

Structural insights into human exon-defined spliceosome prior to activation. Zhang, W., Zhang, X., Zhan, X. et al. Cell Res (2024) 34:428-439. DOI 10.1038/s41422-024-00949-w · PubMed

Other PDB entries of the same protein (UniProt Q6P2Q9 (AlphaFold model), which also has an AlphaFold model), best resolution first:

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