rs397508537

Variant names:

• chr7-117530955-C-A
• rs397508537
• NM_000492.4:c.330C>A

Your query was ambiguous. Multiple possible variants found:

• chr7-117530955-C-A
• chr7-117530955-C-G
• chr7-117530955-C-T

Variant summary

Our verdict is Pathogenic. The variant received 15 ACMG points: 15P and 0B. PS1 PS3 PM1 PM5 PP2 PP3_Moderate

The NM_000492.4(CFTR):​c.330C>A​(p.Asp110Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000103 in 1,461,498 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 drug response (★★★). ClinVar reports functional evidence for this variant: "SCV000696964: "However, functional studies have indicated that the variant greater affects chloride transport (van Goor_2013, Raraigh_2018) and significantly longer mean burst durations (Cui_2014 and Infield_2016)."" and additional evidence is available in ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Pathogenic in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D110V) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000010 (0 hom.)
• Consequence: CFTR NM_000492.4 missense
• Clinical Significance: drug response reviewed by expert panel P:9 U:1 O:2
• Conservation: PhyloP100: -0.359
• Publications: 32 publications found

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)

ACMG classification

Our verdict: Pathogenic. The variant received 15 ACMG points.

• PS1: Transcript NM_000492.4 (CFTR) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar.
• PS3: PS3 evidence extracted from ClinVar submissions: SCV000696964: "However, functional studies have indicated that the variant greater affects chloride transport (van Goor_2013, Raraigh_2018) and significantly longer mean burst durations (Cui_2014 and Infield_2016)."; SCV001589606: Experimental studies have shown that this missense change affects CFTR function (PMID: 23891399, 29805046).; SCV002606446: Functional studies demonstrated that this variant results in reduced CFTR channel function, compared to wild-type protein (Cui G et al. J. Gen. Physiol., 2014 Aug;144:159-79; Van Goor F et al. J. Cyst. Fibros., 2014 Jan;13:29-36; Raraigh KS et al. Am. J. Hum. Genet., 2018 06;102:1062-1077).
• PM1: In a hotspot region, there are 17 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 18 uncertain in NM_000492.4
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr7-117530954-A-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 1729921.
• 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, 0.937

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.330C>A	p.Asp110Glu	missense	Exon 4 of 27	NP_000483.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CFTR	ENST00000003084.11	TSL:1 MANE Select	c.330C>A	p.Asp110Glu	missense	Exon 4 of 27	ENSP00000003084.6	P13569-1
	CFTR	ENST00000699602.1		c.330C>A	p.Asp110Glu	missense	Exon 4 of 27	ENSP00000514471.1	A0A8V8TNH2
	CFTR	ENST00000889206.1		c.330C>A	p.Asp110Glu	missense	Exon 4 of 26	ENSP00000559265.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000159 AC: 4 AN: 251104 AF XY: 0.0000147

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000352

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000103 AC: 15 AN: 1461498 Hom.: 0 Cov.: 31 AF XY: 0.0000110 AC XY: 8 AN XY: 727038

African (AFR) AF: 0.00 AC: 0 AN: 33462

American (AMR) AF: 0.00 AC: 0 AN: 44648

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26126

East Asian (EAS) AF: 0.00 AC: 0 AN: 39684

South Asian (SAS) AF: 0.00 AC: 0 AN: 86242

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53404

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5744

European-Non Finnish (NFE) AF: 0.0000135 AC: 15 AN: 1111814

Other (OTH) AF: 0.00 AC: 0 AN: 60374

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

EpiCase AF: 0.000109

EpiControl AF: 0.00

ClinVar

ClinVar submissions

Significance: drug response

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
5	1	-	Cystic fibrosis (7)
1	-	-	Bronchiectasis with or without elevated sweat chloride 1 (1)
1	-	-	CFTR-related disorder (1)
1	-	-	Cystic fibrosis;C5924204:CFTR-related disorder (1)
1	-	-	not provided (1)
-	-	-	ivacaftor response - Efficacy (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.72
BayesDel_addAF	Pathogenic	0.37	D
BayesDel_noAF	Pathogenic	0.36
CADD	Benign	15
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.62	D
Eigen	Benign	-0.28
Eigen_PC	Benign	-0.34
FATHMM_MKL	Benign	0.46	N
LIST_S2	Uncertain	0.91	D
M_CAP	Pathogenic	0.61	D
MetaRNN	Pathogenic	0.94	D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Benign	0.81	L
PhyloP100		-0.36
PrimateAI	Uncertain	0.72	T
PROVEAN	Uncertain	-3.8	D
REVEL	Pathogenic	0.73
Sift	Uncertain	0.0030	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.97	D
Vest4		0.95
MutPred		0.83		Gain of ubiquitination at K114 (P = 0.0467)
MVP		0.99
MPC		0.0045
ClinPred		0.78	D
GERP RS		0.88
Varity_R		0.40
gMVP		0.83
Mutation Taster		=2/98	disease causing

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

Other links and lift over

dbSNP: rs397508537; hg19: chr7-117171009;