chr11-124637048-CACTGCTTATAT-C

Variant names:

• chr11-124637048-CACTGCTTATAT-C
• NM_170601.5:c.1464_1474delATATAAGCAGT

Variant summary

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

The NM_170601.5(SIAE):​c.1464_1474delATATAAGCAGT​(p.Tyr489SerfsTer7) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type DEL_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. E488E) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SIAE NM_170601.5 frameshift
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.10
• Publications: 0 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SIAE	NM_170601.5	c.1464_1474delATATAAGCAGT	p.Tyr489SerfsTer7	frameshift_variant	Exon 10 of 10	ENST00000263593.8	NP_733746.1
SIAE	NM_001199922.2	c.1359_1369delATATAAGCAGT	p.Tyr454SerfsTer7	frameshift_variant	Exon 12 of 12		NP_001186851.1
SIAE	XM_047427132.1	c.891_901delATATAAGCAGT	p.Tyr298SerfsTer7	frameshift_variant	Exon 7 of 7		XP_047283088.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SIAE	ENST00000263593.8	c.1464_1474delATATAAGCAGT	p.Tyr489SerfsTer7	frameshift_variant	Exon 10 of 10	1	NM_170601.5	ENSP00000263593.3
SIAE	ENST00000618733.4	c.1359_1369delATATAAGCAGT	p.Tyr454SerfsTer7	frameshift_variant	Exon 12 of 12	1		ENSP00000478211.1
SIAE	ENST00000545756.5	c.1359_1369delATATAAGCAGT	p.Tyr454SerfsTer7	frameshift_variant	Exon 11 of 11	5		ENSP00000437877.1

Frequencies

GnomAD3 genomes Cov.: 32

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

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

May 19, 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.Tyr489Serfs*7) in the SIAE gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 35 amino acid(s) of the SIAE protein. This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with SIAE-related conditions. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. 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		7.1

Splicing

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

Other links and lift over

hg19: chr11-124506944;