Genetic Variant SIAE:p.Tyr495LeufsTer5 (chr11-124637039-T-TA) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_170601.5(SIAE):c.1483dupT(p.Tyr495LeufsTer5) variant causes a frameshift change. The variant allele was found at a frequency of 0.0000041 in 1,461,888 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000041 ( 0 hom. )

Consequence

SIAE
NM_170601.5 frameshift

Scores

Not classified

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.41

Publications

0 publications found

Variant links:

Genes affected

SIAE (HGNC:18187): (sialic acid acetylesterase) This gene encodes an enzyme which removes 9-O-acetylation modifications from sialic acids. Mutations in this gene are associated with susceptibility to autoimmune disease 6. Multiple transcript variants encoding different isoforms, found either in the cytosol or in the lysosome, have been found for this gene.[provided by RefSeq, Feb 2011]

SIAE Gene-Disease associations (from GenCC):

autoimmune disease, susceptibility to, 6
Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine

SIAE links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SIAE	NM_170601.5 link	c.1483dupT	p.Tyr495LeufsTer5	frameshift_variant	Exon 10 of 10	ENST00000263593.8	NP_733746.1	Q9HAT2-1
SIAE	NM_001199922.2 link	c.1378dupT	p.Tyr460LeufsTer5	frameshift_variant	Exon 12 of 12		NP_001186851.1	Q9HAT2-2
SIAE	XM_047427132.1 link	c.910dupT	p.Tyr304LeufsTer5	frameshift_variant	Exon 7 of 7		XP_047283088.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SIAE	ENST00000263593.8 link	c.1483dupT	p.Tyr495LeufsTer5	frameshift_variant	Exon 10 of 10	1	NM_170601.5	ENSP00000263593.3	Q9HAT2-1
SIAE	ENST00000618733.4 link	c.1378dupT	p.Tyr460LeufsTer5	frameshift_variant	Exon 12 of 12	1		ENSP00000478211.1	Q9HAT2-2
SIAE	ENST00000545756.5 link	c.1378dupT	p.Tyr460LeufsTer5	frameshift_variant	Exon 11 of 11	5		ENSP00000437877.1	Q9HAT2-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000278

AC:

AN:

251440

AF XY:

0.0000221

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000202

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000410

AC:

AN:

1461888

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727246

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.000134

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1112010

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.508

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Apr 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change creates a premature translational stop signal (p.Tyr495Leufs*5) in the SIAE gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 29 amino acid(s) of the SIAE protein. This variant is present in population databases (rs779900085, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with SIAE-related conditions. ClinVar contains an entry for this variant (Variation ID: 1353579). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

5.4

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

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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11-124637039-T-TA

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over