Human Gene Module / Chromosome 10 / SMC3

SMC3structural maintenance of chromosomes 3

Score
4S
Minimal Evidence, Syndromic Criteria 4.1, Syndromic
Autism Reports / Total Reports
3 / 8
Rare Variants / Common Variants
7 / 0
Aliases
SMC3, BAM,  BMH,  CDLS3,  CSPG6,  HCAPL1, SMC3
Associated Syndromes
Cornelia de Lange syndrome-3 (CDLS3)
Genetic Category
Rare Single Gene Mutation, Syndromic
Chromosome Band
10q25.2
Associated Disorders
-
Relevance to Autism

A de novo likely gene disruptive (LGD) variant in SMC3 was identified in an ASD proband from the Autism Simplex Collection in Stessman et al., 2017. Mutations in the SMC3 gene are associated with a form of Cornelia de Lange syndrome (Cornelia de Lange syndrome 3; OMIM 610759) (Deardorff et al., 2007; Gil-Rodrguez et al., 2015). Phenotypic characterization of 16 patients with Cornelia de Lange-like features caused by SMC3 variants in Gil-Rodrguez et al., 2015 demonstrated that, while intellectual disability was a prominent feature, behavioral problems were less frequently reported (1 individual presented with autism, whereas another presented with autistic features; poor eye contact, attention deficit disorder, aggression, and self-injurious behavior were also observed).

Molecular Function

Central component of cohesin, a complex required for chromosome cohesion during the cell cycle.

Reports related to SMC3 (8 Reports)
# Type Title Author, Year Autism Report Associated Disorders
1 Highly Cited Mutations in cohesin complex members SMC3 and SMC1A cause a mild variant of cornelia de Lange syndrome with predominant mental retardation. Deardorff MA , et al. (2007) No -
2 Primary The contribution of de novo coding mutations to autism spectrum disorder. Iossifov I , et al. (2014) Yes -
3 Support Large-scale discovery of novel genetic causes of developmental disorders. Deciphering Developmental Disorders Study (2014) No -
4 Support De novo heterozygous mutations in SMC3 cause a range of Cornelia de Lange syndrome-overlapping phenotypes. Gil-Rodrguez MC , et al. (2015) No -
5 Recent Recommendation Targeted sequencing identifies 91 neurodevelopmental-disorder risk genes with autism and developmental-disability biases. Stessman HA , et al. (2017) Yes -
6 Support Genomic diagnosis for children with intellectual disability and/or developmental delay. Bowling KM , et al. (2017) No -
7 Recent Recommendation Diagnosis and management of Cornelia de Lange syndrome: first international consensus statement. Kline AD , et al. (2018) No -
8 Support Whole genome sequencing and variant discovery in the ASPIRE autism spectrum disorder cohort. Callaghan DB , et al. (2019) Yes -
Rare Variants   (7)
Status Allele Change Residue Change Variant Type Inheritance Pattern Parental Transmission Family Type PubMed ID Author, Year
c.283G>A p.Glu95Lys missense_variant De novo - - 28554332 Bowling KM , et al. (2017)
T>C p.Leu631Pro missense_variant Unknown - Simplex 31038196 Callaghan DB , et al. (2019)
c.2413C>T p.Arg805Cys missense_variant De novo - Simplex 25363768 Iossifov I , et al. (2014)
c.1464_1466delAGA p.Glu488del inframe_deletion De novo - - 17273969 Deardorff MA , et al. (2007)
G>C p.Gly1188Ala missense_variant De novo - - 25533962 Deciphering Developmental Disorders Study (2014)
TGAAAAGAA>TGAA - frameshift_variant De novo - - 25533962 Deciphering Developmental Disorders Study (2014)
c.2411_2412delTTinsTTT p.Arg805SerfsTer13 frameshift_variant De novo - Simplex 28191889 Stessman HA , et al. (2017)
Common Variants  

No common variants reported.

SFARI Gene score
4S

Minimal Evidence, Syndromic

4S

Score Delta: Score remained at 4.5 + S

4

Minimal Evidence

See all Category 4 Genes

The literature is replete with relatively small studies of candidate genes, using either common or rare variant approaches, which do not reach the criteria set out for categories 1 and 2. Genes that had two such lines of supporting evidence were placed in category 3, and those with one line of evidence were placed in category 4. Some additional lines of "accessory evidence" (indicated as 'acc" in the score cards) could also boost a gene from category 4 to 3.

The syndromic category includes mutations that are associated with a substantial degree of increased risk and consistently linked to additional characteristics not required for an ASD diagnosis. If there is independent evidence implicating a gene in idiopathic ASD, it will be listed as "#S" (e.g., 2S, 3S, etc.). If there is no such independent evidence, the gene will be listed simply as "S."

7/1/2017
4
icon
4S

Score remained at 4S

Description

A de novo likely gene disruptive (LGD) variant in SMC3 was identified in an ASD proband from the Autism Simplex Collection in Stessman et al., 2017. Mutations in the SMC3 gene are associated with a form of Cornelia de Lange syndrome (Cornelia de Lange syndrome 3; OMIM 610759) (Deardorff et al., 2007; Gil-Rodríguez et al., 2015). Phenotypic characterization of 16 patients with Cornelia de Lange-like features caused by SMC3 variants in Gil-Rodríguez et al., 2015 demonstrated that, while intellectual disability was a prominent feature, behavioral problems were less frequently reported (1 individual presented with autism, whereas another presented with autistic features; poor eye contact, attention deficit disorder, aggression, and self-injurious behavior were also observed).

1/1/2017
icon
4

Increased from to 4

Description

A de novo likely gene disruptive (LGD) variant in SMC3 was identified in an ASD proband from the Autism Simplex Collection in Stessman et al., 2017.

Krishnan Probability Score

Score 0.50168859867179

Ranking 2009/25841 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 0.99999999949759

Ranking 88/18225 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
Sanders TADA Score

Score 0.79349148547812

Ranking 2100/18665 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 0.35025904787074

Ranking 2005/20870 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.
CNVs associated with SMC3(1 CNVs)
10q25.2 6 Deletion-Duplication 12  /  13
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