rs150326506

Positions:

chr7-117627556-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_000492.4(CFTR):c.3503A>G(p.Asp1168Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000434 in 1,613,186 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. D1168D) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

CFTR
NM_000492.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 8.29

Variant links:

Genes affected

CFTR (HGNC:1884): (CF transmembrane conductance regulator) This gene encodes a member of the ATP-binding cassette (ABC) transporter superfamily. The encoded protein functions as a chloride channel, making it unique among members of this protein family, and controls ion and water secretion and absorption in epithelial tissues. Channel activation is mediated by cycles of regulatory domain phosphorylation, ATP-binding by the nucleotide-binding domains, and ATP hydrolysis. Mutations in this gene cause cystic fibrosis, the most common lethal genetic disorder in populations of Northern European descent. The most frequently occurring mutation in cystic fibrosis, DeltaF508, results in impaired folding and trafficking of the encoded protein. Multiple pseudogenes have been identified in the human genome. [provided by RefSeq, Aug 2017]

CFTR links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.917

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CFTR	NM_000492.4 linkuse as main transcript	c.3503A>G	p.Asp1168Gly	missense_variant	22/27	ENST00000003084.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CFTR	ENST00000003084.11 linkuse as main transcript	c.3503A>G	p.Asp1168Gly	missense_variant	22/27	1	NM_000492.4	P2	P13569-1
	ENST00000456270.1 linkuse as main transcript	n.66-11216T>C		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152166

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000798

AC:

AN:

250718

Hom.:

AF XY:

0.00000738

AC XY:

AN XY:

135506

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.00

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:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461020

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726818

show subpopulations

Gnomad4 AFR exome

AF:

0.0000598

Gnomad4 AMR exome

AF:

0.00

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:

9.00e-7

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152166

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74332

show subpopulations

Gnomad4 AFR

AF:

0.0000724

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000240

Hom.:

Bravo

AF:

0.0000264

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

EpiCase

AF:

0.0000546

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Mar 22, 2022	PP3, PM2, PM3_supporting -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	May 30, 2017	- -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

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

May 22, 2024

Variant summary: CFTR c.3503A>G (p.Asp1168Gly) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 8e-06 in 250718 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.3503A>G has been reported in the literature in the compound heterozygous state in an individual affected with a CFTR-Related Disease and in an individual with metabolic alkalosis, as well as in an infant with a CF-screening positive inconclusive diagnosis by newborn screening (e.g. Lucarelli_2015, Esposito_2020, Castaldo_2020). These data do not allow any conclusion about variant significance. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 32784480, 33260873, 25910067). ClinVar contains an entry for this variant (Variation ID: 53763). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Cystic fibrosis

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 23, 2022

The p.D1168G variant (also known as c.3503A>G), located in coding exon 22 of the CFTR gene, results from an A to G substitution at nucleotide position 3503. The aspartic acid at codon 1168 is replaced by glycine, an amino acid with similar properties. This variant has been reported in an individual with a CFTR-related disorder; however, clinical details were limited (Lucarelli M et al. Mol. Med., 2015 Apr;21:257-75). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.42

BayesDel_addAF

Pathogenic

0.37

BayesDel_noAF

Pathogenic

0.48

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.75

D;.;.;T;.

Eigen

Uncertain

0.49

Eigen_PC

Uncertain

0.56

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Pathogenic

0.98

D;D;D;D;D

M_CAP

Pathogenic

0.54

MetaRNN

Pathogenic

0.92

D;D;D;D;D

MetaSVM

Benign

-0.38

MutationAssessor

Uncertain

2.2

M;.;.;.;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.53

PROVEAN

Uncertain

-3.2

D;.;.;D;.

REVEL

Pathogenic

0.97

Sift

Uncertain

0.0050

D;.;.;D;.

Sift4G

Uncertain

0.0020

D;.;.;D;.

Polyphen

1.0

D;.;.;.;.

Vest4

0.89

MVP

0.99

MPC

0.0066

ClinPred

0.94

GERP RS

5.8

Varity_R

0.60

gMVP

0.92

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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