NM_014585.6(SLC40A1):c.646A>G (p.Met216Val) AND Hemochromatosis type 4

Germline classification:: Conflicting interpretations of pathogenicity (2 submissions)
Last evaluated:: Feb 20, 2022
Review status:: criteria provided, conflicting classifications

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:: RCV001137400.7

Allele description [Variation Report for NM_014585.6(SLC40A1):c.646A>G (p.Met216Val)]

NM_014585.6(SLC40A1):c.646A>G (p.Met216Val)

Gene:

SLC40A1:solute carrier family 40 member 1 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

2q32.2

Genomic location:

Preferred name:

NM_014585.6(SLC40A1):c.646A>G (p.Met216Val)

HGVS:

NC_000002.12:g.189565468T>C
NG_009027.1:g.20344A>G
NM_014585.6:c.646A>GMANE SELECT
NP_055400.1:p.Met216Val
LRG_837t1:c.646A>G
LRG_837:g.20344A>G
NC_000002.11:g.190430194T>C
NC_000002.11:g.190430194T>C
NM_014585.5:c.646A>G

Protein change:

M216V

Links:

dbSNP: rs757531583

NCBI 1000 Genomes Browser:

rs757531583

Molecular consequence:

NM_014585.6:c.646A>G - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Hemochromatosis type 4 (HFE4)
Synonyms:: Hemochromatosis, autosomal dominant; Hemochromatosis due to defect in ferroportin
Identifiers:: MONDO: MONDO:0011631; MedGen: C1853733; Orphanet: 139491; OMIM: 606069

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV001297334	Illumina Laboratory Services, Illumina	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019)	Benign (Apr 27, 2017)	germline	clinical testing	Citation Link,
SCV003276678	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Feb 20, 2022)	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

SCV001297334

Illumina Laboratory Services, Illumina

criteria provided, single submitter

(ICSL Variant Classification Criteria 13 December 2019)

Benign
(Apr 27, 2017)

germline

clinical testing

Citation Link,

SCV003276678

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Feb 20, 2022)

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 Illumina Laboratory Services, Illumina, SCV001297334.1

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

Description

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign.

#	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

From Labcorp Genetics (formerly Invitae), Labcorp, SCV003276678.1

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

Description

This sequence change replaces methionine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 216 of the SLC40A1 protein (p.Met216Val). This variant is present in population databases (rs757531583, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with SLC40A1-related conditions. ClinVar contains an entry for this variant (Variation ID: 895346). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. 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.

#	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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