Human Gene Module / Chromosome 2 / CCT4

CCT4Chaperonin containing TCP1, subunit 4 (delta)

Score
2
Strong Candidate Criteria 2.1
Autism Reports / Total Reports
2 / 3
Rare Variants / Common Variants
2 / 0
Aliases
CCT4, CCT-DELTA,  Cctd,  SRB
Associated Syndromes
-
Genetic Category
Rare Single Gene Mutation
Chromosome Band
2p15
Associated Disorders
-
Relevance to Autism

Two de novo missense variants in the CCT4 gene were identified in ASD probands from the Simons Simplex Collection in Iossifov et al., 2014. Krumm et al., 2015 reported that no de novo SNVs in this gene were observed in SSC unaffected siblings (de novo SNV P-value <0.05), and no rare effect types were reported in the Exome Variant Server.

Molecular Function

This gene encodes a molecular chaperone that assists the folding of proteins upon ATP hydrolysis. As part of the BBS/CCT complex may play a role in the assembly of BBSome, a complex involved in ciliogenesis regulating transports vesicles to the cilia. Known to play a role, in vitro, in the folding of actin and tubulin.

Reports related to CCT4 (3 Reports)
# Type Title Author, Year Autism Report Associated Disorders
1 Primary The contribution of de novo coding mutations to autism spectrum disorder. Iossifov I , et al. (2014) Yes -
2 Support Excess of rare, inherited truncating mutations in autism. Krumm N , et al. (2015) No -
3 Recent Recommendation Low load for disruptive mutations in autism genes and their biased transmission. Iossifov I , et al. (2015) Yes -
Rare Variants   (2)
Status Allele Change Residue Change Variant Type Inheritance Pattern Parental Transmission Family Type PubMed ID Author, Year
c.98T>C p.Ile33Thr missense_variant De novo NA Simplex 25363768 Iossifov I , et al. (2014)
c.617G>C p.Arg206Thr missense_variant De novo NA Simplex 25363768 Iossifov I , et al. (2014)
Common Variants  

No common variants reported.

SFARI Gene score
2

Strong Candidate

Two de novo missense variants in the CCT4 gene were identified in ASD probands from the Simons Simplex Collection in Iossifov et al., 2014. Krumm et al., 2015 reported that no de novo SNVs in this gene were observed in SSC unaffected siblings (de novo SNV P-value <0.05), and no rare effect types were reported in the Exome Variant Server.

Score Delta: Decreased from 3 to 2

2

Strong Candidate

See all Category 2 Genes

We considered a rigorous statistical comparison between cases and controls, yielding genome-wide statistical significance, with independent replication, to be the strongest possible evidence for a gene. These criteria were relaxed slightly for category 2.

10/1/2019
3
icon
2

Decreased from 3 to 2

New Scoring Scheme
Description

Two de novo missense variants in the CCT4 gene were identified in ASD probands from the Simons Simplex Collection in Iossifov et al., 2014. Krumm et al., 2015 reported that no de novo SNVs in this gene were observed in SSC unaffected siblings (de novo SNV P-value <0.05), and no rare effect types were reported in the Exome Variant Server.

Reports Added
[New Scoring Scheme]
7/1/2018
icon
3

Increased from to 3

Description

Two de novo missense variants in the CCT4 gene were identified in ASD probands from the Simons Simplex Collection in Iossifov et al., 2014. Krumm et al., 2015 reported that no de novo SNVs in this gene were observed in SSC unaffected siblings (de novo SNV P-value <0.05), and no rare effect types were reported in the Exome Variant Server.

4/1/2018
3
icon

Decreased from 3 to

Description

3

1/1/2016
3
icon
3

Decreased from 3 to 3

Description

Two de novo missense variants in the CCT4 gene were identified in ASD probands from the Simons Simplex Collection in Iossifov et al., 2014. Krumm et al., 2015 reported that no de novo SNVs in this gene were observed in SSC unaffected siblings (de novo SNV P-value <0.05), and no rare effect types were reported in the Exome Variant Server.

7/1/2015
icon
3

Increased from to 3

Description

Two de novo missense variants in the CCT4 gene were identified in ASD probands from the Simons Simplex Collection in Iossifov et al., 2014. Krumm et al., 2015 reported that no de novo SNVs in this gene were observed in SSC unaffected siblings (de novo SNV P-value <0.05), and no rare effect types were reported in the Exome Variant Server.

Krishnan Probability Score

Score 0.44716632989304

Ranking 13916/25841 scored genes


[Show Scoring Methodology]
Krishnan and colleagues generated probability scores genome-wide by using a machine learning approach on a human brain-specific gene network. The method was first presented in Nat Neurosci 19, 1454-1462 (2016), and scores for more than 25,000 RefSeq genes can be accessed in column G of supplementary table 3 (see: http://www.nature.com/neuro/journal/v19/n11/extref/nn.4353-S5.xlsx). A searchable browser, with the ability to view networks of associated ASD risk genes, can be found at asd.princeton.edu.
ExAC Score

Score 0.99918405020926

Ranking 1026/18225 scored genes


[Show Scoring Methodology]
The Exome Aggregation Consortium (ExAC) is a summary database of 60,706 exomes that has been widely used to estimate 'constraint' on mutation for individual genes. It was introduced by Lek et al. Nature 536, 285-291 (2016), and the ExAC browser can be found at exac.broadinstitute.org. The pLI score was developed as measure of intolerance to loss-of- function mutation. A pLI > 0.9 is generally viewed as highly constrained, and thus any loss-of- function mutations in autism in such a gene would be more likely to confer risk. For a full list of pLI scores see: ftp://ftp.broadinstitute.org/pub/ExAC_release/release0.3.1/functional_gene_constraint/fordist_cle aned_exac_nonTCGA_z_pli_rec_null_data.txt
Iossifov Probability Score

Score 0.825

Ranking 215/239 scored genes


[Show Scoring Methodology]
Supplementary dataset S2 in the paper by Iossifov et al. (PNAS 112, E5600-E5607 (2015)) lists 239 genes with a probability of at least 0.8 of being associated with autism risk (column I). This probability metric combines the evidence from de novo likely-gene- disrupting and missense mutations and assesses it against the background mutation rate in unaffected individuals from the University of Washington’s Exome Variant Sequence database (evs.gs.washington.edu/EVS/). The list of probability scores can be found here: www.pnas.org/lookup/suppl/doi:10.1073/pnas.1516376112/- /DCSupplemental/pnas.1516376112.sd02.xlsx
Sanders TADA Score

Score 0.74942630114696

Ranking 1549/18665 scored genes


[Show Scoring Methodology]
The TADA score ('Transmission and De novo Association') was introduced by He et al. PLoS Genet 9(8):e1003671 (2013), and is a statistic that integrates evidence from both de novo and transmitted mutations. It forms the basis for the claim of 65 individual genes being strongly associated with autism risk at a false discovery rate of 0.1 (Sanders et al. Neuron 87, 1215-1233 (2015)). The calculated TADA score for 18,665 RefSeq genes can be found in column P of Supplementary Table 6 in the Sanders et al. paper (the column headed 'tadaFdrAscSscExomeSscAgpSmallDel'), which represents a combined analysis of exome data and small de novo deletions (see www.cell.com/cms/attachment/2038545319/2052606711/mmc7.xlsx).
Zhang D Score

Score 0.10793553421392

Ranking 5960/20870 scored genes


[Show Scoring Methodology]
The DAMAGES score (disease-associated mutation analysis using gene expression signatures), or D score, was developed to combine evidence from de novo loss-of- function mutation with evidence from cell-type- specific gene expression in the mouse brain (specifically translational profiles of 24 specific mouse CNS cell types isolated from 6 different brain regions). Genes with positive D scores are more likely to be associated with autism risk, with higher-confidence genes having higher D scores. This statistic was first presented by Zhang & Shen (Hum Mutat 38, 204- 215 (2017), and D scores for more than 20,000 RefSeq genes can be found in column M in supplementary table 2 from that paper.
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