NM_000388.4(CASR):c.848T>C (p.Ile283Thr) AND multiple conditions

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Dec 28, 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:: RCV000463689.18

Allele description [Variation Report for NM_000388.4(CASR):c.848T>C (p.Ile283Thr)]

NM_000388.4(CASR):c.848T>C (p.Ile283Thr)

Gene:

CASR:calcium sensing receptor [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

3q21.1

Genomic location:

Preferred name:

NM_000388.4(CASR):c.848T>C (p.Ile283Thr)

Other names:

p.Ile283Thr

HGVS:

NC_000003.12:g.122261883T>C
NG_009058.1:g.83201T>C
NM_000388.4:c.848T>CMANE SELECT
NM_001178065.2:c.848T>C
NP_000379.3:p.Ile283Thr
NP_001171536.2:p.Ile283Thr
NC_000003.11:g.121980730T>C
NM_000388.3:c.848T>C
NM_001178065.1:c.848T>C

Protein change:

I283T

Links:

dbSNP: rs142745096

NCBI 1000 Genomes Browser:

rs142745096

Molecular consequence:

NM_000388.4:c.848T>C - missense variant - [Sequence Ontology: SO:0001583]
NM_001178065.2:c.848T>C - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Familial hypocalciuric hypercalcemia (FHH)
Synonyms:: Familial benign hypercalcemia
Identifiers:: MONDO: MONDO:0018458; MedGen: C1809471; OMIM: PS145980

Name:: Autosomal dominant hypocalcemia 1 (HYPOC1)
Synonyms:: HYPOCALCEMIA, FAMILIAL
Identifiers:: MONDO: MONDO:0011013; MedGen: C0342345; OMIM: 601198

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000550994	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Dec 28, 2023)	germline	clinical testing	PubMed (2) [See all records that cite these PMIDs] 20164288, 28492532

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000550994

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Dec 28, 2023)

germline

clinical testing

PubMed (2)
[See all records that cite these PMIDs]

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

Calcium-sensing receptor (CASR) mutations in hypercalcemic states: studies from a single endocrine clinic over three years.

Guarnieri V, Canaff L, Yun FH, Scillitani A, Battista C, Muscarella LA, Wong BY, Notarangelo A, D'Agruma L, Sacco M, Cole DE, Hendy GN.

J Clin Endocrinol Metab. 2010 Apr;95(4):1819-29. doi: 10.1210/jc.2008-2430. Epub 2010 Feb 17.

PubMed [citation]

PMID:: 20164288

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, SCV000550994.10

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (2)

Description

This sequence change replaces isoleucine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 283 of the CASR protein (p.Ile283Thr). This variant is present in population databases (rs142745096, gnomAD 0.02%). This missense change has been observed in individual(s) with primary hyperparathyroidism (PMID: 20164288). ClinVar contains an entry for this variant (Variation ID: 410355). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. Experimental studies have shown that this missense change affects CASR function (PMID: 20164288). 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: Oct 8, 2024

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