30EP: DNA-directed RNA polymerase II subunit RPB1

Cryo-EM structure of the yeast RNA polymerase II elongation complex with 19-mer RNA in State III (TL-open), in the presence of substrate ATP. Determined by electron microscopy at 2.55 Å resolution. Released 1 Jul 2026.

Method
Electron microscopy
Resolution
2.55 Å
Organism
Saccharomyces cerevisiae
Chains
13
Atoms
30,347
Mol. weight
522.13 kDa
Ligands
ATP, ZN, MG
Released
1 Jul 2026

Explore 30EP in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

30EP contains 176 α-helices and 199 β-strands across 10 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: 74 helices, 62 β-strands

ElementResiduesLengthSheet
α-helix101
β-strand1111
β-strand16-1832
α-helix24-307
β-strand3413
β-strand82-9093
α-helix93-953
α-helix96-10510
β-strand10614
β-strand11314
α-helix120-1267
α-helix131-14212
β-strand14715
β-strand17015
α-helix171-1722
β-strand173-17756
β-strand180-18456
β-strand200-20236
α-helix2031
α-helix204-2129
α-helix216-2205
β-strand22517
β-strand22917
α-helix231-2344
β-strand236-24163
α-helix260-28223
α-helix289-30416
α-helix312-3143
β-strand31518
β-strand32118
α-helix3221
α-helix325-3295
α-helix335-3395
β-strand343-34539
β-strand348-355810
β-strand363-367510
α-helix368-3736
β-strand375-379511
α-helix385-39410
β-strand402-406511
β-strand412-414311
β-strand431-435511
α-helix4361
β-strand441-445510
α-helix452-4543
β-strand455-463910
β-strand468-470310
α-helix472-4743
α-helix475-4784
β-strand486-490510
α-helix495-50410
β-strand506110
α-helix508-5103
β-strand512-513212
β-strand518-519212
α-helix525-53511
β-strand540-541213
α-helix543-5519
α-helix560-5634
β-strand565114
β-strand571114
β-strand572-573213
α-helix574-5785
α-helix5831
β-strand588-590315
β-strand605-608415
β-strand611-614415
α-helix619-6224
α-helix629-6368
α-helix639-66022
α-helix666-6694
α-helix673-69826
α-helix711-73626
α-helix742-7498
α-helix755-7584
α-helix759-7635
β-strand766-767216
β-strand770117
β-strand773117
α-helix775-7762
β-strand799-800216
α-helix810-84435
β-strand849-850218
β-strand856-857218
β-strand863-865318
α-helix868-8703
β-strand873119
α-helix875-8773
β-strand878-882520
α-helix890-8978
α-helix907-9093
α-helix910-9123
α-helix916-9194
α-helix924-94623
β-strand953-957520
α-helix960-97112
α-helix978-9792
α-helix983-99412
α-helix1005-101410
α-helix1016-102510
α-helix1028-10292
α-helix1030-10356
α-helix1039-105618
β-strand1057119
α-helix1058-10592
α-helix1064-107815
α-helix1097-110610
β-strand1116-1119421
β-strand1120122
α-helix1131-11388
α-helix1143-11453
β-strand1147-1153723
α-helix1167-11737
β-strand1188124
β-strand1192-1197623
α-helix1199-12046
α-helix1209-122012
β-strand1224-1228523
β-strand1236-1242723
β-strand1243124
α-helix1257-127014
β-strand1282-12921121
β-strand1298-13081121
α-helix1313-13164
β-strand1322122
β-strand1328-1329221
α-helix1332-13398
α-helix1341-135616
α-helix1365-137410
α-helix1396-14005
α-helix1405-141511
α-helix14171
β-strand1418-141922
α-helix1424-14307
β-strand1441-1445525
α-helix1448-14514
Chain B: 57 helices, 79 β-strands
ElementResiduesLengthSheet
α-helix24-263
α-helix30-367
α-helix45-539
α-helix54-585
α-helix59-657
β-strand69-73526
α-helix80-823
β-strand84-971426
β-strand101-103327
β-strand109-111327
α-helix114-1207
β-strand125-1401626
α-helix146-1472
β-strand150-156726
β-strand164-171826
α-helix186-1916
β-strand203-205328
β-strand208-210328
β-strand211-212229
α-helix2131
β-strand214-218530
α-helix2191
β-strand224-227431
α-helix228-2292
β-strand234-239631
β-strand242132
β-strand252132
β-strand255-260631
β-strand269-272431
β-strand276133
β-strand280-281231
α-helix282-2898
α-helix294-3029
α-helix309-32012
α-helix327-33711
β-strand338133
α-helix345-35814
α-helix371-38919
α-helix394-3963
α-helix401-4033
β-strand404-407430
α-helix409-43729
α-helix440-4423
α-helix444-4474
α-helix451-46313
β-strand466134
α-helix470-4723
β-strand476134
β-strand480-481229
α-helix488-4947
β-strand497-499330
α-helix516-5183
β-strand522135
β-strand537-538230
β-strand539135
β-strand544-545236
α-helix552-5609
β-strand564-565237
α-helix566-5683
α-helix5771
β-strand578-582537
β-strand585-590637
α-helix593-60614
β-strand614-618537
β-strand623-627537
β-strand633-639736
β-strand640-641238
β-strand650-651238
α-helix655-66612
α-helix681-6866
β-strand690-694536
α-helix697-6993
β-strand703-704236
α-helix707-7093
α-helix728-7292
β-strand740-741236
α-helix745-7484
α-helix753-7553
α-helix759-7613
β-strand762139
α-helix764-77411
β-strand777140
α-helix785-7873
β-strand792-796541
β-strand800142
β-strand804-805243
α-helix807-8104
β-strand821-827744
β-strand838-842544
α-helix843-8486
β-strand853-861941
β-strand873-874245
β-strand898146
α-helix899-9002
β-strand904-906341
β-strand910-912346
β-strand914-915245
β-strand936145
β-strand939-940246
α-helix941-9422
β-strand946-9561141
β-strand962-9721141
β-strand979-981344
β-strand987-994844
β-strand1001-1002247
β-strand1010-1012344
α-helix1014-10163
α-helix1017-10204
β-strand1022139
α-helix1023-103816
α-helix1040-10412
β-strand1042-1043243
α-helix1052-10609
β-strand1069-1070244
β-strand1072-1073247
α-helix10791
β-strand1080147
α-helix10811
β-strand1085-10941044
β-strand1095140
α-helix1099-11013
β-strand1104-1106310
β-strand1111148
β-strand1118148
α-helix1126-11272
β-strand1128-113039
α-helix1132-114110
α-helix1144-11529
β-strand1158-116361
β-strand1172-1174349
β-strand1179-1181349
β-strand1182150
β-strand1187150
β-strand1191-119661
α-helix1198-120912
β-strand1215-121732
Chain C: 15 helices, 12 β-strands
ElementResiduesLengthSheet
β-strand7-13751
β-strand17-23751
α-helix27-3913
β-strand43-541252
α-helix60-689
β-strand72153
α-helix77-793
β-strand97-104852
α-helix1101
β-strand111-114454
α-helix115-1173
β-strand119-120252
α-helix1311
β-strand132153
α-helix1331
β-strand143-147554
β-strand152-1621152
α-helix168-1703
β-strand173-179751
α-helix190-1923
α-helix197-2004
α-helix202-2043
α-helix205-2095
α-helix211-2144
α-helix217-2193
β-strand228-234751
α-helix240-26526
Chain E: 11 helices, 14 β-strands
ElementResiduesLengthSheet
α-helix4-2623
β-strand28155
α-helix32-354
α-helix39-468
β-strand47156
β-strand53156
β-strand60-62357
β-strand64155
α-helix66-716
β-strand78-82557
β-strand88158
α-helix92-10211
β-strand107-112657
β-strand116158
α-helix118-1236
β-strand131-136657
α-helix138-1403
α-helix144-1463
β-strand152-155459
α-helix158-16811
α-helix172-1743
β-strand177-178259
α-helix183-1886
β-strand195-201759
β-strand207-214859
Chain F: 5 helices, 5 β-strands
ElementResiduesLengthSheet
β-strand73125
β-strand84160
α-helix85-862
α-helix87-10216
α-helix117-12610
β-strand132-137625
α-helix1381
β-strand143-147525
β-strand152160
α-helix1531
Chain H: 1 helix, 8 β-strands
ElementResiduesLengthSheet
β-strand4-161314
β-strand23-30814
β-strand37-43714
β-strand54-60714
α-helix89-924
β-strand95-1061214
β-strand111-118814
β-strand121-128814
β-strand139-145714
Chain I: 3 helices, 8 β-strands
ElementResiduesLengthSheet
α-helix13-142
β-strand15-19561
β-strand24-28561
β-strand35-37361
β-strand44-47423
α-helix60-645
β-strand70-71262
α-helix73-753
β-strand83-87562
β-strand99-103562
β-strand109-110262
Chain J: 4 helices, 3 β-strands
ElementResiduesLengthSheet
β-strand6163
β-strand13163
α-helix18-269
α-helix32-387
α-helix44-518
β-strand53142
α-helix57-604

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

Molecules and chains

MoleculeChainsTypeLengthOrganismUniProt
DNA-directed RNA polymerase II subunit RPB1Aprotein1733Saccharomyces cerevisiaeP04050 (AlphaFold model)
DNA-directed RNA polymerase II subunit RPB2Bprotein1224Saccharomyces cerevisiaeP08518 (AlphaFold model)
DNA-directed RNA polymerase II subunit RPB3Cprotein318Saccharomyces cerevisiaeP16370 (AlphaFold model)
DNA-directed RNA polymerases I, II, and III subunit RPABC1Eprotein215Saccharomyces cerevisiaeP20434 (AlphaFold model)
DNA-directed RNA polymerases I, II, and III subunit RPABC2Fprotein155Saccharomyces cerevisiaeP20435
DNA-directed RNA polymerases I, II, and III subunit RPABC3Hprotein146Saccharomyces cerevisiaeP20436
DNA-directed RNA polymerase II subunit RPB9Iprotein122Saccharomyces cerevisiaeP27999
DNA-directed RNA polymerases I, II, and III subunit RPABC5Jprotein70Saccharomyces cerevisiaeP22139
DNA-directed RNA polymerase II subunit RPB11Kprotein120Saccharomyces cerevisiaeP38902
DNA-directed RNA polymerases I, II, and III subunit RPABC4Lprotein70Saccharomyces cerevisiaeP40422
DNA (74-mer)NDNA74Saccharomyces cerevisiae
RNA (5'-r(*up*up*up*up*up*up*up*up*up*cp*ap*up*cp*gp*ap*gp*ap*gp*g)-3')RRNA19Saccharomyces cerevisiae

1 more molecules are not listed.

Sequence of entity 1 (A), FASTA
>30EP_1 DNA-directed RNA polymerase II subunit RPB1 (chains A)
MVGQQYSSAPLRTVKEVQFGLFSPEEVRAISVAKIRFPETMDETQTRAKIGGLNDPRLGS
IDRNLKCQTCQEGMNECPGHFGHIDLAKPVFHVGFIAKIKKVCECVCMHCGKLLLDEHNE
LMRQALAIKDSKKRFAAIWTLCKTKMVCETDVPSEDDPTQLVSRGGCGNTQPTIRKDGLK
LVGSWKKDRATGDADEPELRVLSTEEILNIFKHISVKDFTSLGFNEVFSRPEWMILTCLP
VPPPPVRPSISFNESQRGEDDLTFKLADILKANISLETLEHNGAPHHAIEEAESLLQFHV
ATYMDNDIAGQPQALQKSGRPVKSIRARLKGKEGRIRGNLMGKRVDFSARTVISGDPNLE
LDQVGVPKSIAKTLTYPEVVTPYNIDRLTQLVRNGPNEHPGAKYVIRDSGDRIDLRYSKR
AGDIQLQYGWKVERHIMDNDPVLFNRQPSLHKMSMMAHRVKVIPYSTFRLNLSVTSPYNA
DFDGDEMNLHVPQSEETRAELSQLCAVPLQIVSPQSNKPCMGIVQDTLCGIRKLTLRDTF
IELDQVLNMLYWVPDWDGVIPTPAIIKPKPLWSGKQILSVAIPNGIHLQRFDEGTTLLSP
KDNGMLIIDGQIIFGVVEKKTVGSSNGGLIHVVTREKGPQVCAKLFGNIQKVVNFWLLHN
GFSTGIGDTIADGPTMREITETIAEAKKKVLDVTKEAQANLLTAKHGMTLRESFEDNVVR
FLNEARDKAGRLAEVNLKDLNNVKQMVMAGSKGSFINIAQMSACVGQQSVEGKRIAFGFV
DRTLPHFSKDDYSPESKGFVENSYLRGLTPQEFFFHAMGGREGLIDTAVKTAETGYIQRR
LVKALEDIMVHYDNTTRNSLGNVIQFIYGEDGMDAAHIEKQSLDTIGGSDAAFEKRYRVD
LLNTDHTLDPSLLESGSEILGDLKLQVLLDEEYKQLVKDRKFLREVFVDGEANWPLPVNI
RRIIQNAQQTFHIDHTKPSDLTIKDIVLGVKDLQENLLVLRGKNEIIQNAQRDAVTLFCC
LLRSRLATRRVLQEYRLTKQAFDWVLSNIEAQFLRSVVHPGEMVGVLAAQSIGEPATQMT
LNTFHFAGVASKKVTSGVPRLKEILNVAKNMKTPSLTVYLEPGHAADQEQAKLIRSAIEH
TTLKSVTIASEIYYDPDPRSTVIPEDEEIIQLHFSLLDEEAEQSFDQQSPWLLRLELDRA
AMNDKDLTMGQVGERIKQTFKNDLFVIWSEDNDEKLIIRCRVVRPKSLDAETEAEEDHML
KKIENTMLENITLRGVENIERVVMMKYDRKVPSPTGEYVKEPEWVLETDGVNLSEVMTVP
GIDPTRIYTNSFIDIMEVLGIEAGRAALYKEVYNVIASDGSYVNYRHMALLVDVMTTQGG
LTSVTRHGFNRSNTGALMRCSFEETVEILFEAGASAELDDCRGVSENVILGQMAPIGTGA
FDVMIDEESLVKYMPEQKITEIEDGQDGGVTPYSNESGLVNADLDVKDELMFSPLVDSGS
NDAMAGGFTAYGGADYGEATSPFGAYGEAPTSPGFGVSSPGFSPTSPTYSPTSPAYSPTS
PSYSPTSPSYSPTSPSYSPTSPSYSPTSPSYSPTSPSYSPTSPSYSPTSPSYSPTSPSYS
PTSPSYSPTSPSYSPTSPSYSPTSPSYSPTSPSYSPTSPAYSPTSPSYSPTSPSYSPTSP
SYSPTSPSYSPTSPNYSPTSPSYSPTSPGYSPGSPAYSPKQDEQKHNENENSR
Sequence of entity 2 (B), FASTA
>30EP_2 DNA-directed RNA polymerase II subunit RPB2 (chains B)
MSDLANSEKYYDEDPYGFEDESAPITAEDSWAVISAFFREKGLVSQQLDSFNQFVDYTLQ
DIICEDSTLILEQLAQHTTESDNISRKYEISFGKIYVTKPMVNESDGVTHALYPQEARLR
NLTYSSGLFVDVKKRTYEAIDVPGRELKYELIAEESEDDSESGKVFIGRLPIMLRSKNCY
LSEATESDLYKLKECPFDMGGYFIINGSEKVLIAQERSAGNIVQVFKKAAPSPISHVAEI
RSALEKGSRFISTLQVKLYGREGSSARTIKATLPYIKQDIPIVIIFRALGIIPDGEILEH
ICYDVNDWQMLEMLKPCVEDGFVIQDRETALDFIGRRGTALGIKKEKRIQYAKDILQKEF
LPHITQLEGFESRKAFFLGYMINRLLLCALDRKDQDDRDHFGKKRLDLAGPLLAQLFKTL
FKKLTKDIFRYMQRTVEEAHDFNMKLAINAKTITSGLKYALATGNWGEQKKAMSSRAGVS
QVLNRYTYSSTLSHLRRTNTPIGRDGKLAKPRQLHNTHWGLVCPAETPEGQACGLVKNLS
LMSCISVGTDPMPIITFLSEWGMEPLEDYVPHQSPDATRVFVNGVWHGVHRNPARLMETL
RTLRRKGDINPEVSMIRDIREKELKIFTDAGRVYRPLFIVEDDESLGHKELKVRKGHIAK
LMATEYQDIEGGFEDVEEYTWSSLLNEGLVEYIDAEEEESILIAMQPEDLEPAEANEEND
LDVDPAKRIRVSHHATTFTHCEIHPSMILGVAASIIPFPDHNQSPRNTYQSAMGKQAMGV
FLTNYNVRMDTMANILYYPQKPLGTTRAMEYLKFRELPAGQNAIVAIACYSGYNQEDSMI
MNQSSIDRGLFRSLFFRSYMDQEKKYGMSITETFEKPQRTNTLRMKHGTYDKLDDDGLIA
PGVRVSGEDVIIGKTTPISPDEEELGQRTAYHSKRDASTPLRSTENGIVDQVLVTTNQDG
LKFVKVRVRTTKIPQIGDKFASRHGQKGTIGITYRREDMPFTAEGIVPDLIINPHAIPSR
MTVAHLIECLLSKVAALSGNEGDASPFTDITVEGISKLLREHGYQSRGFEVMYNGHTGKK
LMAQIFFGPTYYQRLRHMVDDKIHARARGPMQVLTRQPVEGRSRDGGLRFGEMERDCMIA
HGAASFLKERLMEASDAFRVHICGICGLMTVIAKLNHNQFECKGCDNKIDIYQIHIPYAA
KLLFQELMAMNITPRLYTDRSRDF
Sequence of entity 3 (C), FASTA
>30EP_3 DNA-directed RNA polymerase II subunit RPB3 (chains C)
MSEEGPQVKIREASKDNVDFILSNVDLAMANSLRRVMIAEIPTLAIDSVEVETNTTVLAD
EFIAHRLGLIPLQSMDIEQLEYSRDCFCEDHCDKCSVVLTLQAFGESESTTNVYSKDLVI
VSNLMGRNIGHPIIQDKEGNGVLICKLRKGQELKLTCVAKKGIAKEHAKWGPAAAIEFEY
DPWNKLKHTDYWYEQDSAKEWPQSKNCEYEDPPNEGDPFDYKAQADTFYMNVESVGSIPV
DQVVVRGIDTLQKKVASILLALTQMDQDKVNFASGDNNTASNMLGSNEDVMMTGAEQDPY
SNASQMGNTGSGGYDNAW
Sequence of entity 4 (E), FASTA
>30EP_4 DNA-directed RNA polymerases I, II, and III subunit RPABC1 (chains E)
MDQENERNISRLWRAFRTVKEMVKDRGYFITQEEVELPLEDFKAKYCDSMGRPQRKMMSF
QANPTEESISKFPDMGSLWVEFCDEPSVGVKTMKTFVIHIQEKNFQTGIFVYQNNITPSA
MKLVPSIPPATIETFNEAALVVNITHHELVPKHIRLSSDEKRELLKRYRLKESQLPRIQR
ADPVALYLGLKRGEVVKIIRKSETSGRYASYRICM
Sequence of entity 5 (F), FASTA
>30EP_5 DNA-directed RNA polymerases I, II, and III subunit RPABC2 (chains F)
MSDYEEAFNDGNENFEDFDVEHFSDEETYEEKPQFKDGETTDANGKTIVTGGNGPEDFQQ
HEQIRRKTLKEKAIPKDQRATTPYMTKYERARILGTRALQISMNAPVFVDLEGETDPLRI
AMKELAEKKIPLVIRRYLPDGSFEDWSVEELIVDL
Sequence of entity 6 (H), FASTA
>30EP_6 DNA-directed RNA polymerases I, II, and III subunit RPABC3 (chains H)
MSNTLFDDIFQVSEVDPGRYNKVCRIEAASTTQDQCKLTLDINVELFPVAAQDSLTVTIA
SSLNLEDTPANDSSATRSWRPPQAGDRSLADDYDYVMYGTAYKFEEVSKDLIAVYYSFGG
LLMRLEGNYRNLNNLKQENAYLLIRR
Sequence of entity 7 (I), FASTA
>30EP_7 DNA-directed RNA polymerase II subunit RPB9 (chains I)
MTTFRFCRDCNNMLYPREDKENNRLLFECRTCSYVEEAGSPLVYRHELITNIGETAGVVQ
DIGSDPTLPRSDRECPKCHSRENVFFQSQQRRKDTSMVLFFVCLSCSHIFTSDQKNKRTQ
FS
Sequence of entity 8 (J), FASTA
>30EP_8 DNA-directed RNA polymerases I, II, and III subunit RPABC5 (chains J)
MIVPVRCFSCGKVVGDKWESYLNLLQEDELDEGTALSRLGLKRYCCRRMILTHVDLIEKF
LRYNPLEKRD
Sequence of entity 9 (K), FASTA
>30EP_9 DNA-directed RNA polymerase II subunit RPB11 (chains K)
MNAPDRFELFLLGEGESKLKIDPDTKAPNAVVITFEKEDHTLGNLIRAELLNDRKVLFAA
YKVEHPFFARFKLRIQTTEGYDPKDALKNACNSIINKLGALKTNFETEWNLQTLAADDAF
Sequence of entity 10 (L), FASTA
>30EP_10 DNA-directed RNA polymerases I, II, and III subunit RPABC4 (chains L)
MSREGFQIPTNLDAAAAGTSQARTATLKYICAECSSKLSLSRTDAVRCKDCGHRILLKAR
TKRLVQFEAR
Sequence of entity 11 (N), FASTA
>30EP_11 DNA (74-MER) (chains N)
TTTTTATGTATTAATGAATTCCTAGTTGATCTCATAGCCCATTCCTACTTGGGAGAAGGA
GCAGAGCGGGATCC
Sequence of entity 12 (R), FASTA
>30EP_12 RNA (5'-R(*UP*UP*UP*UP*UP*UP*UP*UP*UP*CP*AP*UP*CP*GP*AP*GP*AP*GP*G)-3') (chains R)
UUUUUUUUUCAUCGAGAGG

Ligands and cofactors

IDNameFormulaCopies
ATPAdenosine-5'-triphosphateC10 H16 N5 O13 P31
ZNZinc ionZn8
MGMagnesium ionMg2

Primary citation

Structural Dynamics of RNA Polymerase II During Nucleotide Addition Cycle. Yi, G., Li, Q., Holmberg, H. et al. bioRxiv (2026). DOI 10.64898/2026.06.04.730248 · PubMed

Other PDB entries of the same protein (UniProt P04050 (AlphaFold model), which also has an AlphaFold model), best resolution first:

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