NM_022168.4(IFIH1):c.2280del (p.Ser760fs) AND multiple conditions

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Jun 20, 2023
Review status:: 1 star out of maximum of 4 stars
criteria provided, single submitter

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV002595578.3

Allele description [Variation Report for NM_022168.4(IFIH1):c.2280del (p.Ser760fs)]

NM_022168.4(IFIH1):c.2280del (p.Ser760fs)

Gene:

IFIH1:interferon induced with helicase C domain 1 [Gene - OMIM - HGNC]

Variant type:

Deletion

Cytogenetic location:

2q24.2

Genomic location:

Preferred name:

NM_022168.4(IFIH1):c.2280del (p.Ser760fs)

HGVS:

NC_000002.12:g.162276711del
NG_011495.1:g.46819del
NM_022168.4:c.2280delMANE SELECT
NP_071451.2:p.Ser760fs
LRG_1235t1:c.2280del
LRG_1235:g.46819del
LRG_1235p1:p.Ser760fs
NC_000002.11:g.163133221del

Protein change:

S760fs

Molecular consequence:

NM_022168.4:c.2280del - frameshift variant - [Sequence Ontology: SO:0001589]

Condition(s)

Name:: Singleton-Merten syndrome 1 (SGMRT1)
Synonyms:: Widened medullary cavities of bone, aortic calcification, abnormal dentition, and muscular weakness; Syndrome of widened medullary cavities of the metacarpals and phalanges, aortic calcification and abnormal dentition
Identifiers:: MONDO: MONDO:0024535; MedGen: C4225427; Orphanet: 85191; OMIM: 182250

Name:: Aicardi-Goutieres syndrome 7 (AGS7)
Identifiers:: MONDO: MONDO:0014367; MedGen: C3888244; Orphanet: 51; OMIM: 615846

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV003494322	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Jun 20, 2023)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV003494322

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Jun 20, 2023)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group, Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV003494322.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

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. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. ClinVar contains an entry for this variant (Variation ID: 2178514). This variant has not been reported in the literature in individuals affected with IFIH1-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This sequence change creates a premature translational stop signal (p.Ser760Argfs*7) in the IFIH1 gene. It is expected to result in an absent or disrupted protein product. However, the current clinical and genetic evidence is not sufficient to establish whether loss-of-function variants in IFIH1 cause disease.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Sep 29, 2024

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