rs879255619

Positions:

• chr15-75410281-CTCTT-C

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP3 PP5

The NM_001145358.2(SIN3A):​c.1010_1013del​(p.Lys337SerfsTer16) variant causes a frameshift, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 1/1 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 31)
• Consequence: SIN3A NM_001145358.2 frameshift, splice_region
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 8.01

Genes affected

SIN3A (HGNC:19353): (SIN3 transcription regulator family member A) The protein encoded by this gene is a transcriptional regulatory protein. It contains paired amphipathic helix (PAH) domains, which are important for protein-protein interactions and may mediate repression by the Mad-Max complex. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
• PP5: Variant 15-75410281-CTCTT-C is Pathogenic according to our data. Variant chr15-75410281-CTCTT-C is described in ClinVar as [Pathogenic]. Clinvar id is 253071.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr15-75410281-CTCTT-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SIN3A	NM_001145358.2	c.1010_1013del	p.Lys337SerfsTer16	frameshift_variant, splice_region_variant	7/21	ENST00000394947.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SIN3A	ENST00000394947.8	c.1010_1013del	p.Lys337SerfsTer16	frameshift_variant, splice_region_variant	7/21	1	NM_001145358.2	P4

Frequencies

GnomAD3 genomes Cov.: 31

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

SIN3A-related intellectual disability syndrome due to a point mutation Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Aug 12, 2016

- -

Computational scores

Source: dbNSFP v4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.56		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.56		Position offset: -4

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

Publications

LitVar

Other links and lift over

dbSNP: rs879255619; hg19: chr15-75702622;