9S72: Human CCT in Closed Conformation

Human CCT in Closed Conformation. Determined by electron microscopy at 2.71 Å resolution. Released 16 Sept 2026.

Method
Electron microscopy
Resolution
2.71 Å
Organism
Homo sapiens
Chains
16
Atoms
64,888
Mol. weight
955.74 kDa
Ligands
ADP, MG, AF3
Released
16 Sept 2026

Explore 9S72 in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

9S72 contains 391 α-helices and 389 β-strands across 16 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: 24 helices, 26 β-strands

ElementResiduesLengthSheet
β-strand9-12463
α-helix14-3219
β-strand43-47564
β-strand52-55464
α-helix58-647
α-helix70-8516
α-helix92-10918
α-helix114-13522
β-strand138-139265
α-helix146-15611
α-helix165-17814
β-strand181-183366
β-strand187-189366
α-helix192-1943
β-strand196-201667
β-strand209-212467
β-strand213-216468
β-strand228-2371068
β-strand241169
α-helix245-2473
β-strand250-254519
α-helix257-2593
α-helix260-28021
β-strand285-288468
β-strand292169
α-helix294-30310
β-strand306-308368
α-helix313-32311
β-strand328168
β-strand332170
β-strand338170
α-helix342-3443
β-strand346-3551068
β-strand360-367868
β-strand373-379767
α-helix382-40524
β-strand407-410465
α-helix414-42613
α-helix427-4293
α-helix433-44412
α-helix447-4559
α-helix460-47617
α-helix481-4855
β-strand486-489471
β-strand494-497471
α-helix498-5014
β-strand504-506365
α-helix507-52519
β-strand527-533763
α-helix534-5352
Chain A: 25 helices, 27 β-strands
ElementResiduesLengthSheet
β-strand9-1351
α-helix15-3218
α-helix33-353
β-strand42-4652
β-strand52-5542
α-helix58-647
α-helix70-8516
α-helix92-10918
α-helix114-13522
β-strand138-13923
α-helix140-1423
α-helix146-15611
α-helix165-17713
β-strand181-18224
β-strand188-18924
α-helix192-1943
β-strand196-20165
α-helix205-2073
β-strand209-21135
β-strand213-21646
β-strand228-22926
β-strand232-23766
β-strand24117
α-helix245-2473
β-strand250-25458
α-helix257-2593
α-helix260-27920
β-strand285-28846
β-strand29217
α-helix297-3026
β-strand306-30836
α-helix313-32311
β-strand32816
β-strand33219
β-strand33819
α-helix342-3443
β-strand346-355106
β-strand360-36786
β-strand374-37965
α-helix382-40524
β-strand407-41043
α-helix414-42714
α-helix435-44410
α-helix447-4548
α-helix460-47617
β-strand486-489410
β-strand494-497410
α-helix498-5014
β-strand504-50633
α-helix507-52519
β-strand527-53371
α-helix534-5352
Chain b: 24 helices, 26 β-strands
ElementResiduesLengthSheet
β-strand12111
α-helix131
β-strand17-19312
α-helix21-4020
β-strand49-53513
β-strand61-64413
α-helix67-737
α-helix79-9416
α-helix99-11820
α-helix123-14321
β-strand146-147214
α-helix152-16615
α-helix171-1755
α-helix176-18813
α-helix196-1983
β-strand199-205715
α-helix209-2113
β-strand213-214215
β-strand218-220316
β-strand224117
α-helix2251
β-strand232-233216
β-strand236-240517
β-strand244118
β-strand255-258419
α-helix261-28222
β-strand289-292417
β-strand296118
α-helix298-3069
β-strand310-312317
α-helix317-32711
β-strand331-332217
α-helix338-3403
α-helix342-3432
β-strand344-345217
β-strand348-354716
β-strand357-363716
β-strand371-377715
α-helix380-40324
β-strand405-408414
α-helix412-42716
α-helix432-45322
α-helix458-47114
β-strand476-479420
β-strand484-487420
α-helix488-4914
β-strand494-496314
α-helix497-51519
β-strand517-522612
α-helix523-5253
Chain B: 21 helices, 25 β-strands
ElementResiduesLengthSheet
β-strand17-20472
α-helix22-3918
α-helix40-423
β-strand50-53434
β-strand61-64434
α-helix67-737
α-helix79-9416
α-helix99-11820
α-helix123-14321
β-strand146-147273
α-helix152-16615
α-helix171-1755
α-helix176-18813
β-strand199-205774
α-helix209-2113
β-strand213-214274
β-strand218-220375
β-strand224175
β-strand232-240975
β-strand244176
β-strand252177
β-strand254177
β-strand255-25848
α-helix261-28323
β-strand289-292475
β-strand296176
α-helix298-3069
β-strand310-312375
α-helix317-32711
β-strand331-332275
α-helix342-3432
β-strand344-3541175
β-strand357-365975
β-strand371-377774
α-helix380-40223
β-strand405-408473
α-helix412-42514
α-helix432-45423
α-helix458-47013
β-strand476-479478
β-strand484-487478
α-helix488-4914
β-strand494-496373
α-helix497-51519
β-strand517-522672
α-helix523-5264
Chain c: 25 helices, 24 β-strands
ElementResiduesLengthSheet
β-strand15-18464
α-helix20-3617
α-helix38-403
β-strand47-51579
β-strand57-59379
α-helix63-675
α-helix75-9016
α-helix95-11319
α-helix119-13921
β-strand142-143280
α-helix149-16012
α-helix164-1685
α-helix169-18315
β-strand184-187481
β-strand190-193481
α-helix195-1984
β-strand199-203582
α-helix209-2113
β-strand213-215382
β-strand218-220383
β-strand232-233283
β-strand238-241484
β-strand254-258519
α-helix263-28321
β-strand289-292484
α-helix298-3069
β-strand310-312384
α-helix317-32711
β-strand331-332284
α-helix335-3373
α-helix340-3423
β-strand344184
β-strand349-355783
β-strand358-364783
β-strand372-376582
α-helix381-40323
β-strand406-409480
α-helix413-42513
α-helix426-4283
α-helix434-4429
α-helix443-4453
α-helix446-4538
α-helix459-47012
β-strand478-480385
β-strand487-489385
α-helix490-4934
β-strand496-498380
α-helix499-51820
β-strand521-526664
Chain C: 26 helices, 26 β-strands
ElementResiduesLengthSheet
β-strand15-1842
α-helix20-3617
α-helix38-403
α-helix45-462
β-strand47-51521
β-strand57-60421
α-helix63-675
α-helix75-9016
α-helix95-11319
α-helix119-13921
β-strand142-143222
α-helix149-16012
α-helix166-1683
α-helix169-18315
β-strand184-187423
β-strand190-193423
β-strand199-205724
α-helix209-2113
β-strand213-215324
β-strand218-220325
β-strand232-234325
β-strand238126
β-strand239-240227
β-strand241128
β-strand254-25858
α-helix263-28321
β-strand289-291327
α-helix298-3058
β-strand310-312327
α-helix317-3237
α-helix324-3285
β-strand332128
α-helix335-3373
α-helix340-3423
β-strand344126
β-strand349-355725
β-strand358-364725
β-strand372-378724
α-helix381-40323
β-strand406-409422
α-helix413-42513
α-helix426-4283
α-helix434-4429
α-helix443-4453
α-helix446-4538
α-helix459-46911
β-strand478-480329
β-strand487-489329
α-helix490-4934
β-strand496-498322
α-helix499-51618
β-strand519-52462
Chain d: 24 helices, 20 β-strands
ElementResiduesLengthSheet
α-helix29-4719
α-helix49-513
β-strand58-62563
β-strand68-71463
α-helix74-807
α-helix86-10116
α-helix106-12520
α-helix130-15122
β-strand153-154286
α-helix160-17011
α-helix177-1793
α-helix180-19213
α-helix205-2073
β-strand208-214787
α-helix218-2203
β-strand222-224387
β-strand227-229388
α-helix2321
β-strand233188
β-strand240-2491088
β-strand262-266519
α-helix270-29122
β-strand297-301588
α-helix311-3199
β-strand323-328688
α-helix330-3323
α-helix333-3408
β-strand345188
α-helix348-3503
α-helix353-3553
β-strand357-3661088
β-strand372-379888
β-strand386-392787
α-helix395-41723
β-strand420-423486
α-helix427-44216
α-helix446-45611
α-helix460-46910
α-helix473-48513
β-strand491-494489
β-strand499-502489
β-strand509-511386
α-helix512-52918
β-strand532-537613
Chain D: 25 helices, 20 β-strands
ElementResiduesLengthSheet
α-helix29-4719
α-helix49-513
β-strand58-6251
β-strand68-7141
α-helix74-807
α-helix86-10116
α-helix106-12520
α-helix130-15122
β-strand153-154230
α-helix160-17112
α-helix177-1793
α-helix180-19415
α-helix205-2073
β-strand208-212531
α-helix218-2203
β-strand222-224331
β-strand226-229432
β-strand233132
β-strand240-2491032
β-strand262-26658
α-helix269-29224
β-strand297-301532
α-helix311-3199
β-strand323-328632
α-helix330-3323
α-helix333-3397
β-strand345132
α-helix348-3503
α-helix353-3553
α-helix3561
β-strand357-3661032
β-strand372-379832
β-strand386-390531
α-helix395-41723
β-strand420-423430
α-helix427-44216
α-helix446-45712
α-helix460-4689
α-helix473-48513
β-strand491-494433
β-strand499-502433
α-helix503-5064
β-strand509-511330
α-helix512-52918
β-strand535-537334

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

Molecules and chains

MoleculeChainsTypeLengthOrganismUniProt
T-complex protein 1 subunit alphaA, aprotein556Homo sapiensP17987 (AlphaFold model)
T-complex protein 1 subunit betaB, bprotein535Homo sapiensP78371 (AlphaFold model)
T-complex protein 1 subunit gammaC, cprotein545Homo sapiensP49368 (AlphaFold model)
T-complex protein 1 subunit deltaD, dprotein539Homo sapiensP50991 (AlphaFold model)
T-complex protein 1 subunit epsilonE, eprotein541Homo sapiensP48643
T-complex protein 1 subunit zetaF, fprotein531Homo sapiensP40227
T-complex protein 1 subunit etaG, gprotein543Homo sapiensQ99832
T-complex protein 1 subunit thetaH, hprotein548Homo sapiensP50990
Sequence of entity 1 (A, a), FASTA
>9S72_1 T-complex protein 1 subunit alpha (chains A, a)
MEGPLSVFGDRSTGETIRSQNVMAAASIANIVKSSLGPVGLDKMLVDDIGDVTITNDGAT
ILKLLEVEHPAAKVLCELADLQDKEVGDGTTSVVIIAAELLKNADELVKQKIHPTSVISG
YRLACKEAVRYINENLIVNTDELGRDCLINAAKTSMSSKIIGINGDFFANMVVDAVLAIK
YTDIRGQPRYPVNSVNILKAHGRSQMESMLISGYALNCVVGSQGMPKRIVNAKIACLDFS
LQKTKMKLGVQVVITDPEKLDQIRQRESDITKERIQKILATGANVILTTGGIDDMCLKYF
VEAGAMAVRRVLKRDLKRIAKASGATILSTLANLEGEETFEAAMLGQAEEVVQERICDDE
LILIKNTKARTSASIILRGANDFMCDEMERSLHDALCVVKRVLESKSVVPGGGAVEAALS
IYLENYATSMGSREQLAIAEFARSLLVIPNTLAVNAAQDSTDLVAKLRAFHNEAQVNPER
KNLKWIGLDLSNGKPRDNKQAGVFEPTIVKVKSLKFATEAAITILRIDDLIKLHPESKDD
KHGSYEDAVHSGALND
Sequence of entity 2 (B, b), FASTA
>9S72_2 T-complex protein 1 subunit beta (chains B, b)
MASLSLAPVNIFKAGADEERAETARLTSFIGAIAIGDLVKSTLGPKGMDKILLSSGRDAS
LMVTNDGATILKNIGVDNPAAKVLVDMSRVQDDEVGDGTTSVTVLAAELLREAESLIAKK
IHPQTIIAGWREATKAAREALLSSAVDHGSDEVKFRQDLMNIAGTTLSSKLLTHHKDHFT
KLAVEAVLRLKGSGNLEAIHIIKKLGGSLADSYLDEGFLLDKKIGVNQPKRIENAKILIA
NTGMDTDKIKIFGSRVRVDSTAKVAEIEHAEKEKMKEKVERILKHGINCFINRQLIYNYP
EQLFGAAGVMAIEHADFAGVERLALVTGGEIASTFDHPELVKLGSCKLIEEVMIGEDKLI
HFSGVALGEACTIVLRGATQQILDEAERSLHDALCVLAQTVKDSRTVYGGGCSEMLMAHA
VTQLANRTPGKEAVAMESYAKALRMLPTIIADNAGYDSADLVAQLRAAHSEGNTTAGLDM
REGTIGDMAILGITESFQVKRQVLLSAAEAAEVILRVDNIIKAAPRKRVPDHHPC
Sequence of entity 3 (C, c), FASTA
>9S72_3 T-complex protein 1 subunit gamma (chains C, c)
MMGHRPVLVLSQNTKRESGRKVQSGNINAAKTIADIIRTCLGPKSMMKMLLDPMGGIVMT
NDGNAILREIQVQHPAAKSMIEISRTQDEEVGDGTTSVIILAGEMLSVAEHFLEQQMHPT
VVISAYRKALDDMISTLKKISIPVDISDSDMMLNIINSSITTKAISRWSSLACNIALDAV
KMVQFEENGRKEIDIKKYARVEKIPGGIIEDSCVLRGVMINKDVTHPRMRRYIKNPRIVL
LDSSLEYKKGESQTDIEITREEDFTRILQMEEEYIQQLCEDIIQLKPDVVITEKGISDLA
QHYLMRANITAIRRVRKTDNNRIARACGARIVSRPEELREDDVGTGAGLLEIKKIGDEYF
TFITDCKDPKACTILLRGASKEILSEVERNLQDAMQVCRNVLLDPQLVPGGGASEMAVAH
ALTEKSKAMTGVEQWPYRAVAQALEVIPRTLIQNCGASTIRLLTSLRAKHTQENCETWGV
NGETGTLVDMKELGIWEPLAVKLQTYKTAVETAVLLLRIDDIVSGHKKKGDDQSRQGGAP
DAGQE
Sequence of entity 4 (D, d), FASTA
>9S72_4 T-complex protein 1 subunit delta (chains D, d)
MPENVAPRSGATAGAAGGRGKGAYQDRDKPAQIRFSNISAAKAVADAIRTSLGPKGMDKM
IQDGKGDVTITNDGATILKQMQVLHPAARMLVELSKAQDIEAGDGTTSVVIIAGSLLDSC
TKLLQKGIHPTIISESFQKALEKGIEILTDMSRPVELSDRETLLNSATTSLNSKVVSQYS
SLLSPMSVNAVMKVIDPATATSVDLRDIKIVKKLGGTIDDCELVEGLVLTQKVSNSGITR
VEKAKIGLIQFCLSAPKTDMDNQIVVSDYAQMDRVLREERAYILNLVKQIKKTGCNVLLI
QKSILRDALSDLALHFLNKMKIMVIKDIEREDIEFICKTIGTKPVAHIDQFTADMLGSAE
LAEEVNLNGSGKLLKITGCASPGKTVTIVVRGSNKLVIEEAERSIHDALCVIRCLVKKRA
LIAGGGAPEIELALRLTEYSRTLSGMESYCVRAFADAMEVIPSTLAENAGLNPISTVTEL
RNRHAQGEKTAGINVRKGGISNILEELVVQPLLVSVSALTLATETVRSILKIDDVVNTR
Sequence of entity 5 (E, e), FASTA
>9S72_5 T-complex protein 1 subunit epsilon (chains E, e)
MASMGTLAFDEYGRPFLIIKDQDRKSRLMGLEALKSHIMAAKAVANTMRTSLGPNGLDKM
MVDKDGDVTVTNDGATILSMMDVDHQIAKLMVELSKSQDDEIGDGTTGVVVLAGALLEEA
EQLLDRGIHPIRIADGYEQAARVAIEHLDKISDSVLVDIKDTEPLIQTAKTTLGSKVVNS
CHRQMAEIAVNAVLTVADMERRDVDFELIKVEGKVGGRLEDTKLIKGVIVDKDFSHPQMP
KKVEDAKIAILTCPFEPPKPKTKHKLDVTSVEDYKALQKYEKEKFEEMIQQIKETGANLA
ICQWGFDDEANHLLLQNNLPAVRWVGGPEIELIAIATGGRIVPRFSELTAEKLGFAGLVQ
EISFGTTKDKMLVIEQCKNSRAVTIFIRGGNKMIIEEAKRSLHDALCVIRNLIRDNRVVY
GGGAAEISCALAVSQEADKCPTLEQYAMRAFADALEVIPMALSENSGMNPIQTMTEVRAR
QVKEMNPALGIDCLHKGTNDMKQQHVIETLIGKKQQISLATQMVRMILKIDDIRKPGESE
E
Sequence of entity 6 (F, f), FASTA
>9S72_6 T-complex protein 1 subunit zeta (chains F, f)
MAAVKTLNPKAEVARAQAALAVNISAARGLQDVLRTNLGPKGTMKMLVSGAGDIKLTKDG
NVLLHEMQIQHPTASLIAKVATAQDDITGDGTTSNVLIIGELLKQADLYISEGLHPRIIT
EGFEAAKEKALQFLEEVKVSREMDRETLIDVARTSLRTKVHAELADVLTEAVVDSILAIK
KQDEPIDLFMIEIMEMKHKSETDTSLIRGLVLDHGARHPDMKKRVEDAYILTCNVSLEYE
KTEVNSGFFYKSAEEREKLVKAERKFIEDRVKKIIELKRKVCGDSDKGFVVINQKGIDPF
SLDALSKEGIVALRRAKRRNMERLTLACGGVALNSFDDLSPDCLGHAGLVYEYTLGEEKF
TFIEKCNNPRSVTLLIKGPNKHTLTQIKDAVRDGLRAVKNAIDDGCVVPGAGAVEVAMAE
ALIKHKPSVKGRAQLGVQAFADALLIIPKVLAQNSGFDLQETLVKIQAEHSESGQLVGVD
LNTGEPMVAAEVGVWDNYCVKKQLLHSCTVIATNILLVDEIMRAGMSSLKG
Sequence of entity 7 (G, g), FASTA
>9S72_7 T-complex protein 1 subunit eta (chains G, g)
MMPTPVILLKEGTDSSQGIPQLVSNISACQVIAEAVRTTLGPRGMDKLIVDGRGKATISN
DGATILKLLDVVHPAAKTLVDIAKSQDAEVGDGTTSVTLLAAEFLKQVKPYVEEGLHPQI
IIRAFRTATQLAVNKIKEIAVTVKKADKVEQRKLLEKCAMTALSSKLISQQKAFFAKMVV
DAVMMLDDLLQLKMIGIKKVQGGALEDSQLVAGVAFKKTFSYAGFEMQPKKYHNPKIALL
NVELELKAEKDNAEIRVHTVEDYQAIVDAEWNILYDKLEKIHHSGAKVVLSKLPIGDVAT
QYFADRDMFCAGRVPEEDLKRTMMACGGSIQTSVNALSADVLGRCQVFEETQIGGERYNF
FTGCPKAKTCTFILRGGAEQFMEETERSLHDAIMIVRRAIKNDSVVAGGGAIEMELSKYL
RDYSRTIPGKQQLLIGAYAKALEIIPRQLCDNAGFDATNILNKLRARHAQGGTWYGVDIN
NEDIADNFEAFVWEPAMVRINALTAASEAACLIVSVDETIKNPRSTVDAPTAAGRGRGRG
RPH
Sequence of entity 8 (H, h), FASTA
>9S72_8 T-complex protein 1 subunit theta (chains H, h)
MALHVPKAPGFAQMLKEGAKHFSGLEEAVYRNIQACKELAQTTRTAYGPNGMNKMVINHL
EKLFVTNDAATILRELEVQHPAAKMIVMASHMQEQEVGDGTNFVLVFAGALLELAEELLR
IGLSVSEVIEGYEIACRKAHEILPNLVCCSAKNLRDIDEVSSLLRTSIMSKQYGNEVFLA
KLIAQACVSIFPDSGHFNVDNIRVCKILGSGISSSSVLHGMVFKKETEGDVTSVKDAKIA
VYSCPFDGMITETKGTVLIKTAEELMNFSKGEENLMDAQVKAIADTGANVVVTGGKVADM
ALHYANKYNIMLVRLNSKWDLRRLCKTVGATALPRLTPPVLEEMGHCDSVYLSEVGDTQV
VVFKHEKEDGAISTIVLRGSTDNLMDDIERAVDDGVNTFKVLTRDKRLVPGGGATEIELA
KQITSYGETCPGLEQYAIKKFAEAFEAIPRALAENSGVKANEVISKLYAVHQEGNKNVGL
DIEAEVPAVKDMLEAGILDTYLGKYWAIKLATNAAVTVLRVDQIIMAKPAGGPKPPSGKK
DWDDDQND

Ligands and cofactors

IDNameFormulaCopies
ADPAdenosine-5'-diphosphateC10 H15 N5 O10 P216
MGMagnesium ionMg16
AF3Aluminum fluorideAl F316

Primary citation

CryoEM Strategies for Elucidating the Closed State Architecture of CCT. Gutierrez-Seijo, J., Cuervo, A., Pipaon, S. et al. Methods Mol Biol (2026) 3070:263-282. DOI 10.1007/978-1-0716-5515-3_15 · PubMed

Other PDB entries of the same protein (UniProt P17987 (AlphaFold model), which also has an AlphaFold model), best resolution first:

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