rs121908750

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 17 ACMG points: 17P and 0B. PM1PM2PP2PP3_StrongPP5_Very_Strong

The NM_000492.4(CFTR):c.271G>A(p.Gly91Arg) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Pathogenic (★★★). Synonymous variant affecting the same amino acid position (i.e. G91G) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

CFTR
NM_000492.4 missense, splice_region

Scores

Splicing: ADA: 0.9249

Clinical Significance

Pathogenic reviewed by expert panel P:6

Conservation

PhyloP100: 7.71

Publications

19 publications found

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 Gene-Disease associations (from GenCC):

cystic fibrosis
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae), Myriad Women’s Health, Orphanet
congenital bilateral absence of vas deferens
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
hereditary chronic pancreatitis
Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

CFTR links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 17 ACMG points.

PM1

In a hotspot region, there are 8 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 22 uncertain in NM_000492.4

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 197 curated pathogenic missense variants (we use a threshold of 10). The gene has 46 curated benign missense variants. Gene score misZ: -3.1397 (below the threshold of 3.09). Trascript score misZ: -1.0868 (below the threshold of 3.09). GenCC associations: The gene is linked to hereditary chronic pancreatitis, cystic fibrosis, congenital bilateral absence of vas deferens.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.979

PP5

Variant 7-117509140-G-A is Pathogenic according to our data. Variant chr7-117509140-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 7183.Status of the report is reviewed_by_expert_panel, 3 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CFTR	NM_000492.4 link	c.271G>A	p.Gly91Arg	missense_variant, splice_region_variant	Exon 3 of 27	ENST00000003084.11	NP_000483.3	P13569-1A0A024R730

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CFTR	ENST00000003084.11 link	c.271G>A	p.Gly91Arg	missense_variant, splice_region_variant	Exon 3 of 27	1	NM_000492.4	ENSP00000003084.6		P13569-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000399

AC:

AN:

250610

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1361460

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

683258

African (AFR)

AF:

0.00

AC:

AN:

31540

American (AMR)

AF:

0.00

AC:

AN:

44614

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25560

East Asian (EAS)

AF:

0.00

AC:

AN:

39182

South Asian (SAS)

AF:

0.00

AC:

AN:

84272

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52900

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5500

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1020958

Other (OTH)

AF:

0.00

AC:

AN:

56934

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:6

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Cystic fibrosis

Pathogenic:4

Oct 21, 2022

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

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: CFTR c.271G>A (p.Gly91Arg) results in a non-conservative amino acid change located in the ABC transporter type 1, transmembrane domain (IPR011527) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. Although this variant alters a conserved nucleotide located in the exonic-splice region, 4/4 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 4e-06 in 250610 control chromosomes. c.271G>A has been reported in the literature as a biallelic genotype in multiple individuals affected with features of Cystic Fibrosis (example, Claustres_2000, Feldmann_2003, Sarles_2014, McCague_2019). These data indicate that the variant is very likely to be associated with disease. At least one publication reports experimental evidence evaluating an impact on protein function (Han_2018). The most pronounced variant effect results in approximately 1.6% of normal residual CFTR function. One clinical diagnostic laboratory and two databases (CFTR-2 and CFTR-France) have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All submitters classified the variant as pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. -

Apr 01, 1993

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Aug 31, 2018

CFTR2

Significance:Pathogenic

Review Status:reviewed by expert panel

Collection Method:research

- -

Jan 29, 2018

CFTR-France

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:curation

- -

CFTR-related disorder

Pathogenic:1

Mar 17, 2017

Natera, Inc.

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Bronchiectasis with or without elevated sweat chloride 1

Pathogenic:1

Jan 24, 2024

Baylor Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.95

BayesDel_addAF

Pathogenic

0.38

BayesDel_noAF

Pathogenic

0.48

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.67

.;D;.;.;T;.

Eigen

Uncertain

0.61

Eigen_PC

Pathogenic

0.66

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.95

D;D;D;D;D;D

M_CAP

Uncertain

0.26

MetaRNN

Pathogenic

0.98

D;D;D;D;D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Benign

1.3

.;L;.;.;.;L

PhyloP100

7.7

PrimateAI

Uncertain

0.75

PROVEAN

Pathogenic

-6.9

D;D;.;.;D;.

REVEL

Pathogenic

0.83

Sift

Uncertain

0.0040

D;T;.;.;D;.

Sift4G

Pathogenic

0.0

D;D;.;.;D;.

Polyphen

0.95

.;P;.;.;.;.

Vest4

0.95

MutPred

0.95

.;Gain of MoRF binding (P = 0.0199);Gain of MoRF binding (P = 0.0199);Gain of MoRF binding (P = 0.0199);Gain of MoRF binding (P = 0.0199);Gain of MoRF binding (P = 0.0199);

MVP

1.0

MPC

0.0054

ClinPred

0.91

GERP RS

5.7

Varity_R

0.94

gMVP

0.97

Mutation Taster

=14/86

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.92

dbscSNV1_RF

Pathogenic

0.79

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over