NM_000492.4:c.2249C>T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PP2PP5BP4

The NM_000492.4(CFTR):c.2249C>T(p.Pro750Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000604 in 1,613,060 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P750T) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00038 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00063 ( 1 hom. )

Consequence

CFTR
NM_000492.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:24U:6

Conservation

PhyloP100: 3.24

Publications

29 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: Orphanet, Labcorp Genetics (formerly Invitae), Myriad Women’s Health, Laboratory for Molecular Medicine
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: Uncertain_significance. The variant received 1 ACMG points.

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.

PP5

Variant 7-117592416-C-T is Pathogenic according to our data. Variant chr7-117592416-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 53460.

BP4

Computational evidence support a benign effect (MetaRNN=0.19061673). . Strength limited to SUPPORTING due to the PP5.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000492.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CFTR	NM_000492.4	MANE Select	c.2249C>T	p.Pro750Leu	missense	Exon 14 of 27	NP_000483.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CFTR	ENST00000003084.11	TSL:1 MANE Select	c.2249C>T	p.Pro750Leu	missense	Exon 14 of 27	ENSP00000003084.6	P13569-1
CFTR	ENST00000699602.1		c.2249C>T	p.Pro750Leu	missense	Exon 14 of 27	ENSP00000514471.1	A0A8V8TNH2
CFTR	ENST00000889206.1		c.2162C>T	p.Pro721Leu	missense	Exon 13 of 26	ENSP00000559265.1

Frequencies

GnomAD3 genomes

AF:

0.000381

AC:

AN:

152182

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

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:

0.000750

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000288

AC:

AN:

249946

AF XY:

0.000281

show subpopulations

Gnomad AFR exome

AF:

0.0000617

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000163

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000601

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000627

AC:

916

AN:

1460760

Hom.:

Cov.:

AF XY:

0.000607

AC XY:

441

AN XY:

726662

show subpopulations

African (AFR)

AF:

0.000150

AC:

AN:

33440

American (AMR)

AF:

0.0000224

AC:

AN:

44618

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26032

East Asian (EAS)

AF:

0.0000756

AC:

AN:

39686

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86052

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53378

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.000783

AC:

870

AN:

1111450

Other (OTH)

AF:

0.000580

AC:

AN:

60338

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

108

163

217

271

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

102

136

170

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000381

AC:

AN:

152300

Hom.:

Cov.:

AF XY:

0.000309

AC XY:

AN XY:

74478

show subpopulations

African (AFR)

AF:

0.000144

AC:

AN:

41574

American (AMR)

AF:

0.00

AC:

AN:

15300

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000750

AC:

AN:

68016

Other (OTH)

AF:

0.000473

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.486

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000663

Hom.:

Bravo

AF:

0.000325

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000698

AC:

ExAC

AF:

0.000222

AC:

EpiCase

AF:

0.000763

EpiControl

AF:

0.000534

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Cystic fibrosis (13)

not provided (7)

CFTR-related disorder (4)

Cystic fibrosis;C0238339:Hereditary pancreatitis;C0403814:Congenital bilateral aplasia of vas deferens from CFTR mutation;C2749757:Bronchiectasis with or without elevated sweat chloride 1 (2)

Bronchiectasis with or without elevated sweat chloride 1 (1)

Congenital bilateral aplasia of vas deferens from CFTR mutation (1)

Cystic fibrosis diagnostic test (1)

Hereditary pancreatitis (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Uncertain

0.094

BayesDel_noAF

Pathogenic

0.25

CADD

Benign

(source)

DANN

Benign

0.94

DEOGEN2

Uncertain

0.78

Eigen

Benign

-0.26

Eigen_PC

Benign

-0.24

FATHMM_MKL

Uncertain

0.88

LIST_S2

Uncertain

0.89

M_CAP

Uncertain

0.23

MetaRNN

Benign

0.19

MetaSVM

Uncertain

0.58

MutationAssessor

Uncertain

2.4

PhyloP100

3.2

PrimateAI

Benign

0.45

PROVEAN

Uncertain

-3.1

REVEL

Pathogenic

0.66

Sift

Uncertain

0.022

Sift4G

Uncertain

0.0030

Polyphen

0.030

Vest4

0.74

MVP

0.98

MPC

0.0044

ClinPred

0.12

GERP RS

4.7

Varity_R

0.19

gMVP

0.38

Mutation Taster

=3/97

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over