CCT6B

gene
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Also known as Cctz2TSA303

Summary

CCT6B (chaperonin containing TCP1 subunit 6B, HGNC:1621) is a protein-coding gene on chromosome 17q12, encoding Probable T-complex protein 1 subunit zeta-2 (Q92526). Could function as a component of a tissue-specific chaperonin-containing T-complex (TRiC), a molecular chaperone complex that assists the folding of actin, tubulin and other proteins upon ATP hydrolysis.

This gene encodes a molecular chaperone that is a member of the chaperonin-containing TCP1 complex (CCT), also known as the TCP1 ring complex (TRiC). This complex consists of two identical stacked rings, each containing eight different proteins. Unfolded polypeptides enter the central cavity of the complex and are folded in an ATP-dependent manner. The complex folds various proteins, including actin and tubulin. Alternative splicing results in multiple transcript variants.

Source: NCBI Gene 10693 — RefSeq curated summary.

At a glance

  • GWAS associations: 2
  • Clinical variants (ClinVar): 93 total
  • MANE Select transcript: NM_006584

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:1621
Approved symbolCCT6B
Namechaperonin containing TCP1 subunit 6B
Location17q12
Locus typegene with protein product
StatusApproved
AliasesCctz2, TSA303
Ensembl geneENSG00000132141
Ensembl biotypeprotein_coding
OMIM610730
Entrez10693

Gene structure

Transcript identifiers

Ensembl transcripts: 7 — 6 protein_coding, 1 retained_intron

ENST00000314144, ENST00000421975, ENST00000436961, ENST00000577307, ENST00000585073, ENST00000885297, ENST00000885298

RefSeq mRNA: 3 — MANE Select: NM_006584 NM_001193529, NM_001193530, NM_006584

CCDS: CCDS32617, CCDS54105, CCDS54106

Canonical transcript exons

ENST00000314144 — 14 exons

ExonStartEnd
ENSE000009035953493918334939330
ENSE000009035963493961734939713
ENSE000009036003495195034952053
ENSE000009036023495856034958694
ENSE000009036043496125734961460
ENSE000010174813494279634942906
ENSE000014092653492786134928117
ENSE000016318223494248434942643
ENSE000016815553495958734959650
ENSE000035572243492896234929034
ENSE000036048543493094934931051
ENSE000036488023494053934940621
ENSE000036667993495442634954599
ENSE000036744113493236734932500

Expression profiles

Bgee: expression breadth ubiquitous, 210 present calls, max score 97.58.

FANTOM5 (CAGE): breadth broad, TPM avg 2.0106 / max 202.0861, expressed in 878 samples.

FANTOM5 promoters (5 alternative TSS)

Promoter IDTPM avgSamples expressed
1653220.9064449
1653200.6525311
1653230.3165124
1653210.100427
1653240.03487

Top tissues by expression

284 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
spermCL:000001997.58gold quality
male germ cellCL:000001597.04gold quality
left testisUBERON:000453396.59gold quality
right testisUBERON:000453495.97gold quality
testisUBERON:000047394.59gold quality
adult organismUBERON:000702394.11gold quality
male germ line stem cell (sensu Vertebrata) in testisCL:0000089 ∩ UBERON:000047387.94gold quality
primordial germ cell in gonadCL:0000670 ∩ UBERON:000099181.22gold quality
olfactory segment of nasal mucosaUBERON:000538679.27gold quality
calcaneal tendonUBERON:000370177.20gold quality
gastrocnemiusUBERON:000138876.54gold quality
palpebral conjunctivaUBERON:000181276.38gold quality
muscle of legUBERON:000138376.21gold quality
nasal cavity mucosaUBERON:000182675.55gold quality
mucosa of stomachUBERON:000119974.78gold quality
nasal cavity epitheliumUBERON:000538474.35silver quality
epithelium of nasopharynxUBERON:000195174.06silver quality
nasopharynxUBERON:000172874.05silver quality
right adrenal gland cortexUBERON:003582774.02gold quality
tibiaUBERON:000097973.35gold quality
left adrenal gland cortexUBERON:003582573.30gold quality
right adrenal glandUBERON:000123373.10gold quality
tibialis anteriorUBERON:000138573.08silver quality
left adrenal glandUBERON:000123472.93gold quality
bronchial epithelial cellCL:000232872.60gold quality
corpus epididymisUBERON:000435972.09gold quality
hindlimb stylopod muscleUBERON:000425271.97gold quality
right uterine tubeUBERON:000130271.68gold quality
stromal cell of endometriumCL:000225571.47gold quality
skeletal muscle organUBERON:001489271.45gold quality

Single-cell (SCXA)

Detected in 1 experiment(s), a significant marker in 0.

ExperimentMarker?Max mean expression
E-ANND-3no5.50

Regulation

Is transcription factor: no

Upstream regulators (CollecTRI, top): ESR1

miRNA regulators (miRDB)

22 targeting CCT6B, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-548N99.9871.944170
HSA-MIR-3617-5P99.7569.411968
HSA-MIR-64199.7569.351975
HSA-MIR-217-5P99.4969.931419
HSA-MIR-20A-3P99.4469.101575
HSA-MIR-548AV-3P99.4368.501721
HSA-MIR-513A-3P99.3970.633620
HSA-MIR-513C-3P99.3970.633620
HSA-MIR-124499.3368.38832
HSA-MIR-296-3P99.2166.56474
HSA-MIR-892C-5P99.1670.562116
HSA-MIR-6807-3P99.1569.231275
HSA-MIR-3606-3P99.1169.843254
HSA-MIR-548L99.0670.902560
HSA-MIR-452-3P99.0166.251241
HSA-MIR-570198.9769.541502
HSA-MIR-315498.9466.551455
HSA-MIR-3144-3P98.1567.34677
HSA-MIR-805597.6266.091023
HSA-MIR-3667-5P97.1664.87591
HSA-MIR-367294.4665.67646
HSA-MIR-6864-3P94.4665.97625

Literature-anchored findings (GeneRIF, showing 2)

  • antagonistic actions of PhLP3 and prefoldin serve to modulate CCT activity and play a key role in establishing a functional cytoskeleton in vivo (PMID:16415341)
  • Describes the cloning of a very similar protein in mouse. (PMID:9013858)

Cross-species orthologs

5 orthologs

OrganismSymbolGene ID
danio_reriocct6aENSDARG00000021252
mus_musculusCct6bENSMUSG00000020698
rattus_norvegicusCct6bENSRNOG00000007523
drosophila_melanogasterCCT6FBGN0027329
caenorhabditis_elegansWBGENE00000381

Paralogs (13): PIKFYVE (ENSG00000115020), CCT4 (ENSG00000115484), TCP1 (ENSG00000120438), MKKS (ENSG00000125863), CCT7 (ENSG00000135624), HSPD1 (ENSG00000144381), CCT6A (ENSG00000146731), CCT5 (ENSG00000150753), CCT8 (ENSG00000156261), CCT3 (ENSG00000163468), CCT2 (ENSG00000166226), BBS12 (ENSG00000181004), CCT8L2 (ENSG00000198445)

Protein

Protein identifiers

Probable T-complex protein 1 subunit zeta-2Q92526 (reviewed: Q92526)

Alternative names: CCT-zeta-2, CCT-zeta-like, Chaperonin containing T-complex polypeptide 1 subunit 6B, TCP-1-zeta-like, Testis-specific Tcp20, Testis-specific protein TSA303

All UniProt accessions (2): Q92526, J3KRI6

UniProt curated annotations — full annotation on UniProt →

Function. Could function as a component of a tissue-specific chaperonin-containing T-complex (TRiC), a molecular chaperone complex that assists the folding of actin, tubulin and other proteins upon ATP hydrolysis.

Subunit / interactions. Could be a component of a tissue-specific chaperonin-containing T-complex (TRiC), a hexadecamer composed of two identical back-to-back stacked rings enclosing a protein folding chamber. Each ring is made up of eight different subunits: TCP1/CCT1, CCT2, CCT3, CCT4, CCT5, CCT6, CCT7, CCT8.

Subcellular location. Cytoplasm.

Tissue specificity. Testis-specific.

Similarity. Belongs to the TCP-1 chaperonin family.

Isoforms (3)

UniProt IDNamesCanonical?
Q92526-11yes
Q92526-22
Q92526-33

RefSeq proteins (3): NP_001180458, NP_001180459, NP_006575* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR002194Chaperonin_TCP-1_CSConserved_site
IPR002423Cpn60/GroEL/TCP-1Family
IPR012722Chap_CCT_zetaFamily
IPR017998TCP-1Family
IPR027409GroEL-like_apical_dom_sfHomologous_superfamily
IPR027410TCP-1-like_intermed_sfHomologous_superfamily
IPR027413GROEL-like_equatorial_sfHomologous_superfamily
IPR053374

Pfam: PF00118

Catalyzed reactions (Rhea), 1 shown:

  • ATP + H2O = ADP + phosphate + H(+) (RHEA:13065)

UniProt features (21 total): binding site 9, sequence conflict 6, sequence variant 3, splice variant 2, chain 1

Structure

Experimental structures (PDB)

0 structures.

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q92526-F189.980.69

Functional residue map

Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.

Ligand- & substrate-binding residues (9): 39; 90; 91; 92; 93; 411; 412; 496; 501

Function

Pathways and Gene Ontology

Reactome pathways

9 pathways

IDPathway
R-HSA-389957Prefoldin mediated transfer of substrate to CCT/TriC
R-HSA-389960Formation of tubulin folding intermediates by CCT/TriC
R-HSA-390450Folding of actin by CCT/TriC
R-HSA-390471Association of TriC/CCT with target proteins during biosynthesis
R-HSA-6814122Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding
R-HSA-389958Cooperation of Prefoldin and TriC/CCT in actin and tubulin folding
R-HSA-390466Chaperonin-mediated protein folding
R-HSA-391251Protein folding
R-HSA-392499Metabolism of proteins

MSigDB gene sets: 141 (showing top): BROWNE_HCMV_INFECTION_4HR_UP, DARWICHE_SKIN_TUMOR_PROMOTER_DN, DARWICHE_PAPILLOMA_RISK_LOW_DN, DARWICHE_PAPILLOMA_RISK_HIGH_DN, DARWICHE_SQUAMOUS_CELL_CARCINOMA_DN, GOBP_PROTEIN_MATURATION, GOBP_PROTEIN_FOLDING, SPIELMAN_LYMPHOBLAST_EUROPEAN_VS_ASIAN_DN, NFE2_01, MGGAAGTG_GABP_B, GOMF_UNFOLDED_PROTEIN_BINDING, GOMF_HYDROLASE_ACTIVITY_ACTING_ON_ACID_ANHYDRIDES, GOMF_ATP_HYDROLYSIS_ACTIVITY, GOMF_ADENYL_NUCLEOTIDE_BINDING, FOSTER_KDM1A_TARGETS_UP

GO Biological Process (1): protein folding (GO:0006457)

GO Molecular Function (7): ATP binding (GO:0005524), ATP hydrolysis activity (GO:0016887), protein folding chaperone (GO:0044183), obsolete unfolded protein binding (GO:0051082), ATP-dependent protein folding chaperone (GO:0140662), nucleotide binding (GO:0000166), protein binding (GO:0005515)

GO Cellular Component (3): cytosol (GO:0005829), chaperonin-containing T-complex (GO:0005832), cytoplasm (GO:0005737)

Reactome top-level categories

Rollup of top-4 pathways:

CategoryPathways
Cooperation of Prefoldin and TriC/CCT in actin and tubulin folding3
Chaperonin-mediated protein folding3
Protein folding1
Metabolism of proteins1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
ATP-dependent activity2
cellular anatomical structure2
cellular process1
protein maturation1
adenyl ribonucleotide binding1
purine ribonucleoside triphosphate binding1
ribonucleoside triphosphate phosphatase activity1
molecular_function1
protein folding1
protein folding chaperone1
nucleoside phosphate binding1
heterocyclic compound binding1
binding1
cytoplasm1
cytosol1
protein folding chaperone complex1
intracellular anatomical structure1

Protein interactions and networks

STRING

2792 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
CCT6BCCT5P48643748
CCT6BCCT2P78371731
CCT6BCCT3P49368719
CCT6BCCT4P50991589
CCT6BCCT8P50990574
CCT6BCCT7Q99832555
CCT6BTCP1P17987541
CCT6BTUBA8Q9NY65511
CCT6BRPA1P27694504
CCT6BJADE1Q6IE81498
CCT6BTUBA4AP05215440
CCT6BTEX30Q5JUR7402
CCT6BKIF3AQ9Y496393
CCT6BC1orf185Q5T7R7391
CCT6BHSPA4LO95757390

IntAct

281 interactions, top by confidence:

ABTypeScore
HDAC1CDK2AP1psi-mi:“MI:0914”(association)0.840
SEPTIN12SEPTIN6psi-mi:“MI:0914”(association)0.830
HDAC1TNRC18psi-mi:“MI:0914”(association)0.790
MOB4STK25psi-mi:“MI:0914”(association)0.730
CCT2TXNDC9psi-mi:“MI:0914”(association)0.730
BUB3ZNF207psi-mi:“MI:0914”(association)0.690
TUBA1BTXNDC9psi-mi:“MI:0914”(association)0.640
DCTN5DCTN6psi-mi:“MI:0914”(association)0.640
PDCL3PEX7psi-mi:“MI:0914”(association)0.640
GNB1GNG7psi-mi:“MI:0914”(association)0.640
TUBA1CCCT6Apsi-mi:“MI:0914”(association)0.640
CCT3TXNDC9psi-mi:“MI:0914”(association)0.640
CCT5TXNDC9psi-mi:“MI:0914”(association)0.640
LOXL4CCT6Bpsi-mi:“MI:0915”(physical association)0.620
ACTBL2POTEFpsi-mi:“MI:0914”(association)0.530
DCAF8DCAF8L1psi-mi:“MI:0914”(association)0.530
DYNC2I2TCP1psi-mi:“MI:0914”(association)0.530
KLHDC8APEX7psi-mi:“MI:0914”(association)0.530
FBXW4TXNDC9psi-mi:“MI:0914”(association)0.530
TUBG2TXNDC9psi-mi:“MI:0914”(association)0.530
HCFC2SETD1Apsi-mi:“MI:0914”(association)0.530
GNB2PFDN6psi-mi:“MI:0914”(association)0.530
DCAF5PFDN6psi-mi:“MI:0914”(association)0.530
DCAF11GNPATpsi-mi:“MI:0914”(association)0.530
KLHDC2PFDN1psi-mi:“MI:0914”(association)0.530
THOC3CLUHpsi-mi:“MI:0914”(association)0.530
MRPL38DUSP14psi-mi:“MI:0914”(association)0.530
TUBB2AEML2psi-mi:“MI:0914”(association)0.530
EIPR1LDHCpsi-mi:“MI:0914”(association)0.530

BioGRID (297): CCT6B (Affinity Capture-MS), CCT6B (Affinity Capture-MS), CCT6B (Affinity Capture-MS), CCT6B (Affinity Capture-MS), CCT6B (Affinity Capture-MS), CCT6B (Affinity Capture-MS), CCT6B (Affinity Capture-MS), CCT6B (Affinity Capture-MS), CCT6B (Affinity Capture-MS), CCT6B (Affinity Capture-MS), CCT6B (Affinity Capture-MS), CCT6B (Affinity Capture-MS), CCT6B (Affinity Capture-MS), CCT6B (Affinity Capture-MS), CCT6B (Affinity Capture-MS)

ESM2 similar proteins: O04450, O15891, O77622, O94515, P12612, P28769, P39078, P39079, P40227, P40412, P40413, P42943, P46550, P47208, P47209, P48643, P50991, P50999, P53451, P54409, P54411, P80315, P80316, P80317, P87153, Q2T9X2, Q3MHL7, Q3T084, Q4R6V2, Q54ER7, Q54TD3, Q5R637, Q5RCD2, Q5RF02, Q5ZJ54, Q61390, Q68FQ0, Q6C100, Q6CL82, Q6FQT2

Diamond homologs: A1TKQ5, A1W3W8, A9BXL3, B9MDC5, C0Z361, O04450, O15891, O24730, O24731, O24732, O24734, O24735, O26320, O26885, O28045, O28821, O30560, O30561, O57762, O74341, O77622, O93624, O94515, P21240, P28488, P39079, P40227, P40412, P40413, P46219, P46550, P47209, P48424, P48425, P48643, P50016, P50157, P50991, P53451, P54411

SIGNOR signaling

0 interactions.

Enriched among interaction partners

Reactome pathways and GO biological processes over-represented among this gene’s 198 IntAct physical interaction partners (hypergeometric vs the genome-wide background, BH-FDR, gene-set size 15–500, ranked by fold). A functional readout of the neighbourhood — distinct from this gene’s own memberships above, and biased toward well-studied / hub proteins, so read it as themes rather than proof.

Reactome pathways:

PathwayPartnersFoldFDR
Formation of tubulin folding intermediates by CCT/TriC1343.3×2e-16
Cooperation of Prefoldin and TriC/CCT in actin and tubulin folding1341.8×2e-16
Prefoldin mediated transfer of substrate to CCT/TriC1340.3×3e-16
Chaperonin-mediated protein folding1433.1×3e-16
Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane730.0×8e-08
Transport of connexons to the plasma membrane730.0×8e-08
Protein folding1428.6×3e-15
Association of TriC/CCT with target proteins during biosynthesis1227.7×6e-13

GO biological processes:

GO termPartnersFoldFDR
positive regulation of telomere maintenance via telomerase834.5×4e-08
binding of sperm to zona pellucida512.4×4e-03
microtubule cytoskeleton organization1410.0×4e-08
mitotic cell cycle129.4×1e-06
protein folding137.9×2e-06
protein stabilization155.9×6e-06

Disease & clinical

Clinical variants and AI predictions

ClinVar

93 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance79
Likely benign3
Benign1

Top pathogenic / likely-pathogenic (0)

SpliceAI

2528 predictions. Top by Δscore:

VariantEffectΔscore
17:34928113:CTGTG:Cacceptor_gain1.0000
17:34929032:CAC:Cacceptor_gain1.0000
17:34929033:ACCT:Aacceptor_loss1.0000
17:34929034:CCTGA:Cacceptor_loss1.0000
17:34929035:CTGAA:Cacceptor_loss1.0000
17:34930943:TCTTA:Tdonor_loss1.0000
17:34930944:CTTA:Cdonor_loss1.0000
17:34930945:TTA:Tdonor_loss1.0000
17:34930946:TA:Tdonor_loss1.0000
17:34930947:A:AGdonor_loss1.0000
17:34930948:C:CAdonor_loss1.0000
17:34931050:ACCT:Aacceptor_loss1.0000
17:34931053:T:Aacceptor_loss1.0000
17:34931393:T:Adonor_gain1.0000
17:34932362:TGTAC:Tdonor_loss1.0000
17:34932364:TACC:Tdonor_loss1.0000
17:34932365:ACC:Adonor_loss1.0000
17:34932421:T:TAdonor_gain1.0000
17:34932496:ACAAC:Aacceptor_gain1.0000
17:34932497:CAAC:Cacceptor_gain1.0000
17:34932497:CAACC:Cacceptor_gain1.0000
17:34932498:AAC:Aacceptor_gain1.0000
17:34932499:AC:Aacceptor_gain1.0000
17:34932499:ACCT:Aacceptor_loss1.0000
17:34932500:CCTA:Cacceptor_loss1.0000
17:34932500:CCTAT:Cacceptor_gain1.0000
17:34932501:C:CCacceptor_gain1.0000
17:34932502:T:Cacceptor_loss1.0000
17:34932504:T:TCacceptor_gain1.0000
17:34939176:AGCTT:Adonor_loss1.0000

AlphaMissense

3459 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
17:34958580:C:GA106P0.995
17:34940557:T:AK317I0.993
17:34932387:C:GA443P0.991
17:34942490:A:CN293K0.990
17:34942490:A:TN293K0.990
17:34958675:G:TA74D0.990
17:34942497:A:TV291D0.989
17:34940563:C:GR315T0.988
17:34940572:G:TA312D0.987
17:34942829:A:GL231P0.987
17:34954560:C:GA126P0.987
17:34954572:C:GG122R0.987
17:34954572:C:TG122R0.987
17:34939648:C:TG345E0.985
17:34940562:T:AR315S0.985
17:34940562:T:GR315S0.985
17:34940567:G:TR314S0.985
17:34942500:A:TV290D0.985
17:34942539:A:GL277P0.985
17:34954559:G:TA126E0.985
17:34958690:A:GI69T0.984
17:34928085:T:AD519V0.983
17:34940563:C:AR315I0.983
17:34958666:A:TI77K0.983
17:34961314:G:TA27D0.983
17:34932393:C:GA441P0.982
17:34942824:A:GC233R0.982
17:34942889:A:TV211D0.982
17:34958627:T:AD90V0.982
17:34928117:G:CC508W0.981

dbSNP variants (sampled 300 via entrez): RS1000049411 (17:34946617 G>T), RS1000096608 (17:34934598 A>T), RS1000108026 (17:34940154 G>A), RS1000125341 (17:34978523 C>T), RS1000173473 (17:34947631 C>T), RS1000266842 (17:34947874 C>A,G,T), RS1000321814 (17:34940441 T>C), RS1000331702 (17:34933615 T>C,G), RS1000400432 (17:34946300 C>T), RS1000585743 (17:34959238 C>T), RS1000732041 (17:34953014 T>C), RS1000811711 (17:34951877 G>T), RS1000816643 (17:34954651 A>C), RS1000827107 (17:34959279 A>C,G), RS1000935173 (17:34959438 T>A)

Disease associations

OMIM: gene MIM:610730 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

0 total (0 of 0 shown, HPO-id order):

GWAS associations

2 associations (top):

StudyTraitp-value
GCST003542_132Night sleep phenotypes2.000000e-07
GCST003542_133Night sleep phenotypes4.000000e-07

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

PharmGKB: 1 entry (VIP=true, CPIC=false)

CTD chemical–gene interactions

17 total (human), top 17 by PubMed support.

ChemicalActions (top 5)PubMed papers
Silicon Dioxidedecreases expression2
urushioldecreases expression1
methylmercuric chloridedecreases expression1
bisphenol Adecreases expression1
tris(1,3-dichloro-2-propyl)phosphateincreases expression1
butyraldehydedecreases expression1
resorcinoldecreases expression1
abrineincreases expression1
Benzeneincreases expression1
Benzo(a)pyrenedecreases expression1
Cisplatindecreases expression1
Ivermectindecreases expression1
Thimerosalincreases expression1
Tobacco Smoke Pollutiondecreases expression1
Aflatoxin B1decreases expression1
Okadaic Aciddecreases expression1
Particulate Matterincreases expression1

Clinical trials (associated diseases)

0 trials via MONDO — disease-level, not drug-specific.

No linked Atlas pages yet — the cross-entity mesh grows as the corpus expands.