NM_000388.4:c.3091G>A

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 3P and 9B. PM1PP2BP4_StrongBP6BS1

The NM_000388.4(CASR):c.3091G>A(p.Gly1031Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000105 in 1,614,220 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00057 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000056 ( 1 hom. )

Consequence

CASR
NM_000388.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:5

Conservation

PhyloP100: 1.52

Variant links:

Genes affected

CASR (HGNC:1514): (calcium sensing receptor) The protein encoded by this gene is a plasma membrane G protein-coupled receptor that senses small changes in circulating calcium concentration. The encoded protein couples this information to intracellular signaling pathways that modify parathyroid hormone secretion or renal cation handling, and thus this protein plays an essential role in maintaining mineral ion homeostasis. Mutations in this gene are a cause of familial hypocalciuric hypercalcemia, neonatal severe hyperparathyroidism, and autosomal dominant hypocalcemia. [provided by RefSeq, Aug 2017]

CASR links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

PM1

In a topological_domain Cytoplasmic (size 215) in uniprot entity CASR_HUMAN there are 14 pathogenic changes around while only 2 benign (88%) in NM_000388.4

PP2

Missense variant in the CASR gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 114 curated pathogenic missense variants (we use a threshold of 10). The gene has 10 curated benign missense variants. Gene score misZ: 3.1237 (above the threshold of 3.09). Trascript score misZ: 4.8257 (above the threshold of 3.09). GenCC associations: The gene is linked to epilepsy, autosomal dominant hypocalcemia, familial hypocalciuric hypercalcemia 1, epilepsy, idiopathic generalized, susceptibility to, 8, neonatal severe primary hyperparathyroidism, autosomal dominant hypocalcemia 1.

BP4

Computational evidence support a benign effect (MetaRNN=0.009535402).

BP6

Variant 3-122285045-G-A is Benign according to our data. Variant chr3-122285045-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 35797.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Benign=3, Uncertain_significance=1}.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000571 (87/152326) while in subpopulation AFR AF= 0.0019 (79/41574). AF 95% confidence interval is 0.00156. There are 0 homozygotes in gnomad4. There are 41 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CASR	NM_000388.4 link	c.3091G>A	p.Gly1031Ser	missense_variant	Exon 7 of 7	ENST00000639785.2	NP_000379.3	P41180-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CASR	ENST00000639785.2 link	c.3091G>A	p.Gly1031Ser	missense_variant	Exon 7 of 7	1	NM_000388.4	ENSP00000491584.2	P41180-1
CASR	ENST00000498619.4 link	c.3121G>A	p.Gly1041Ser	missense_variant	Exon 7 of 7	1		ENSP00000420194.1	P41180-2
CASR	ENST00000638421.1 link	c.3091G>A	p.Gly1031Ser	missense_variant	Exon 7 of 7	5		ENSP00000492190.1	P41180-1
CASR	ENST00000490131.7 link	c.2860G>A	p.Gly954Ser	missense_variant	Exon 5 of 5	5		ENSP00000418685.2	A0A1X7SBX3

Frequencies

GnomAD3 genomes

AF:

0.000572

AC:

AN:

152208

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00191

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000327

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.000955

GnomAD3 exomes

AF:

0.000179

AC:

AN:

251382

Hom.:

AF XY:

0.000110

AC XY:

AN XY:

135916

show subpopulations

Gnomad AFR exome

AF:

0.00234

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.0000561

AC:

AN:

1461894

Hom.:

Cov.:

AF XY:

0.0000454

AC XY:

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.00200

Gnomad4 AMR exome

AF:

0.000179

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.000571

AC:

AN:

152326

Hom.:

Cov.:

AF XY:

0.000550

AC XY:

AN XY:

74496

show subpopulations

Gnomad4 AFR

AF:

0.00190

Gnomad4 AMR

AF:

0.000327

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000945

Alfa

AF:

0.0000533

Hom.:

Bravo

AF:

0.000680

ESP6500AA

AF:

0.00113

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000222

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1Benign:2

Mar 13, 2019

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: CASR c.3091G>A (p.Gly1031Ser) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function (ACMG BP4). The variant allele was found at a frequency of 0.00022 in 277196 control chromosomes, predominantly at a frequency of 0.0022 within the African subpopulation in the gnomAD database, including 1 homozygote. The observed variant frequency within African control individuals in the gnomAD database is approximately 176 fold of the estimated maximal expected allele frequency for a pathogenic variant in CASR causing Familial Hypocalciuric Hypercalcemia phenotype (1.3e-05), strongly suggesting that the variant is a benign polymorphism found primarily in populations of African origin (ACMG BS1). To our knowledge, no occurrence of c.3091G>A in individuals affected with Familial Hypocalciuric Hypercalcemia and no experimental evidence demonstrating its impact on protein function have been reported. This variant was previously classified as a VUS-possibly pathogenic variant that was converted during ClinVar submission to likely pathogenic in 2011. Two clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. One laboratory classified the variant as likely benign, and one laboratory classified the variant as uncertain significance. No new evidence supporting a pathogenic outcome has emerged over a span of eight years (2011-2019). Based on the evidence outlined above, the variant was classified as likely benign. -

Mar 08, 2024

Athena Diagnostics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 08, 2017

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nephrolithiasis/nephrocalcinosis

Benign:1

Mar 02, 2023

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Familial hypocalciuric hypercalcemia 1

Benign:1

May 28, 2019

Mendelics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Autosomal dominant hypocalcemia 1;C1809471:Familial hypocalciuric hypercalcemia

Benign:1

Jan 01, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.068

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.44

CADD

Benign

DANN

Benign

0.76

DEOGEN2

Benign

0.32

T;T;.;.

Eigen

Benign

-0.63

Eigen_PC

Benign

-0.53

FATHMM_MKL

Benign

0.31

LIST_S2

Benign

0.79

.;T;T;T

M_CAP

Benign

0.026

MetaRNN

Benign

0.0095

T;T;T;T

MetaSVM

Benign

-0.81

MutationAssessor

Benign

0.90

L;L;.;.

PrimateAI

Benign

0.29

PROVEAN

Benign

-0.56

.;.;N;.

REVEL

Benign

0.14

Sift

Benign

0.25

.;.;T;.

Sift4G

Benign

0.59

.;.;T;.

Polyphen

0.0

B;B;.;.

Vest4

0.056

MVP

0.85

MPC

0.60

ClinPred

0.015

GERP RS

3.6

Varity_R

0.051

gMVP

0.18

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

Details are displayed if max score is > 0.2

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over