chr7-117665574-T-C

Variant names:

• chr7-117665574-T-C
• rs138642693
• NM_000492.4:c.4242+10T>C

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 0P and 3B. BP4_Moderate BP6

The NM_000492.4(CFTR):​c.4242+10T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00022 in 1,534,760 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).

• Frequency:
  • Genomes: 𝑓 0.0011 (0 hom., cov: 33)
  • Exomes 𝑓: 0.00012 (1 hom.)
• Consequence: CFTR NM_000492.4 intron
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:9
• Conservation: PhyloP100: 0.878
• Publications: 2 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: Likely_benign. The variant received -3 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.45).
• BP6: Variant 7-117665574-T-C is Benign according to our data. Variant chr7-117665574-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 53928.

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.4242+10T>C		intron	N/A	NP_000483.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CFTR	ENST00000003084.11	TSL:1 MANE Select	c.4242+10T>C		intron	N/A	ENSP00000003084.6	P13569-1
	CFTR	ENST00000699602.1		c.4236+10T>C		intron	N/A	ENSP00000514471.1	A0A8V8TNH2
	CFTR	ENST00000889206.1		c.4155+10T>C		intron	N/A	ENSP00000559265.1

Frequencies

GnomAD3 genomes AF: 0.00111 AC: 169 AN: 152236 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00388

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

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: 0.0000735

Gnomad OTH AF: 0.000478

GnomAD2 exomes AF: 0.000335 AC: 84 AN: 250468 AF XY: 0.000236

Gnomad AFR exome AF: 0.00481

Gnomad AMR exome AF: 0.0000290

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000265

Gnomad OTH exome AF: 0.000328

GnomAD4 exome AF: 0.000122 AC: 168 AN: 1382406 Hom.: 1 Cov.: 23 AF XY: 0.000111 AC XY: 77 AN XY: 692566

African (AFR) AF: 0.00408 AC: 130 AN: 31832

American (AMR) AF: 0.0000898 AC: 4 AN: 44564

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25570

East Asian (EAS) AF: 0.00 AC: 0 AN: 39182

South Asian (SAS) AF: 0.00 AC: 0 AN: 84590

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53334

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5618

European-Non Finnish (NFE) AF: 0.00000865 AC: 9 AN: 1040092

Other (OTH) AF: 0.000434 AC: 25 AN: 57624

GnomAD4 genome AF: 0.00111 AC: 169 AN: 152354 Hom.: 0 Cov.: 33 AF XY: 0.00109 AC XY: 81 AN XY: 74496

African (AFR) AF: 0.00387 AC: 161 AN: 41586

American (AMR) AF: 0.000131 AC: 2 AN: 15300

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10630

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000735 AC: 5 AN: 68028

Other (OTH) AF: 0.000473 AC: 1 AN: 2112

Alfa AF: 0.000990 Hom.: 0

Bravo AF: 0.00128

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	3	Cystic fibrosis (4)
-	-	4	not provided (4)
-	-	2	not specified (2)
-	1	-	CFTR-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.45
CADD	Benign	6.8
DANN	Benign	0.91
PhyloP100		0.88
Mutation Taster		=92/8	polymorphism

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: rs138642693; hg19: chr7-117305628;