Genetic Variant SIM2:c.349-83A>T (chr21-36719738-A-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_005069.6(SIM2):c.349-83A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000254 in 787,618 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000016 ( 0 hom. )

Consequence

SIM2
NM_005069.6 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -2.48

Publications

7 publications found

Variant links:

Genes affected

SIM2 (HGNC:10883): (SIM bHLH transcription factor 2) This gene represents a homolog of the Drosophila single-minded (sim) gene, which encodes a transcription factor that is a master regulator of neurogenesis. The encoded protein is ubiquitinated by RING-IBR-RING-type E3 ubiquitin ligases, including the parkin RBR E3 ubiquitin protein ligase. This gene maps within the so-called Down syndrome chromosomal region, and is thus thought to contribute to some specific Down syndrome phenotypes. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Sep 2014]

SIM2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.97).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005069.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SIM2	NM_005069.6	MANE Select	c.349-83A>T		intron	N/A	NP_005060.1
	SIM2	NM_009586.5		c.349-83A>T		intron	N/A	NP_033664.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
SIM2	ENST00000290399.11	TSL:1 MANE Select	c.349-83A>T	intron	N/A	ENSP00000290399.6
SIM2	ENST00000431229.1	TSL:1	c.160-83A>T	intron	N/A	ENSP00000392003.1
SIM2	ENST00000483178.2	TSL:3	c.58-83A>T	intron	N/A	ENSP00000476273.1

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

151868

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000157

AC:

AN:

635750

Hom.:

AF XY:

0.00

AC XY:

AN XY:

340678

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

17630

American (AMR)

AF:

0.00

AC:

AN:

40900

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19692

East Asian (EAS)

AF:

0.00

AC:

AN:

35728

South Asian (SAS)

AF:

0.00

AC:

AN:

66606

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50956

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2516

European-Non Finnish (NFE)

AF:

0.00000271

AC:

AN:

368912

Other (OTH)

AF:

0.00

AC:

AN:

32810

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000658

AC:

AN:

151868

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74146

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41336

American (AMR)

AF:

0.0000655

AC:

AN:

15274

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5154

South Asian (SAS)

AF:

0.00

AC:

AN:

4814

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10550

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67958

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

38261

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.97

CADD

Benign

0.17

(source)

DANN

Benign

0.26

PhyloP100

-2.5

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over