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NM_030943.4(AMN):c.811C>T (p.Arg271Trp) AND Imerslund-Grasbeck syndrome

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Sep 12, 2022
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:
RCV001361099.4

Allele description [Variation Report for NM_030943.4(AMN):c.811C>T (p.Arg271Trp)]

NM_030943.4(AMN):c.811C>T (p.Arg271Trp)

Gene:
AMN:amnion associated transmembrane protein [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
14q32.32
Genomic location:
Preferred name:
NM_030943.4(AMN):c.811C>T (p.Arg271Trp)
HGVS:
  • NC_000014.9:g.102929705C>T
  • NG_008276.2:g.12050C>T
  • NM_030943.4:c.811C>TMANE SELECT
  • NP_112205.2:p.Arg271Trp
  • LRG_642:g.12050C>T
  • NC_000014.8:g.103396042C>T
  • NM_030943.3:c.811C>T
Protein change:
R271W
Links:
dbSNP: rs765147150
NCBI 1000 Genomes Browser:
rs765147150
Molecular consequence:
  • NM_030943.4:c.811C>T - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
Imerslund-Grasbeck syndrome
Synonyms:
Megaloblastic anemia due to inborn errors of metabolism; Pernicious anemia, juvenile, due to selective intestinal malabsorption of vitamin b12, with proteinuria; Enterocyte cobalamin malabsorption; See all synonyms [MedGen]
Identifiers:
MONDO: MONDO:0009853; MedGen: C4551825; Orphanet: 35858; OMIM: PS261100

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Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV001557063Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))		Uncertain significance
(Sep 12, 2022) 		germlineclinical testing

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

Help

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical 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, SCV001557063.3

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (1)

Description

This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 271 of the AMN protein (p.Arg271Trp). 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 variant has not been reported in the literature in individuals affected with AMN-related conditions. ClinVar contains an entry for this variant (Variation ID: 1052839). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt AMN protein function. 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.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Sep 29, 2024