18-55528018-G-A

Variant names:

• chr18-55528018-G-A
• rs7240986
• NM_001083962.2:c.145+57262C>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001083962.2(TCF4):​c.145+57262C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.387 in 151,824 control chromosomes in the GnomAD database, including 11,491 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.39 (11491 hom., cov: 32)
• Consequence: TCF4 NM_001083962.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.685
• Publications: 8 publications found

Genes affected

TCF4 (HGNC:11634): (transcription factor 4) This gene encodes transcription factor 4, a basic helix-loop-helix transcription factor. The encoded protein recognizes an Ephrussi-box ('E-box') binding site ('CANNTG') - a motif first identified in immunoglobulin enhancers. This gene is broadly expressed, and may play an important role in nervous system development. Defects in this gene are a cause of Pitt-Hopkins syndrome. In addition, an intronic CTG repeat normally numbering 10-37 repeat units can expand to >50 repeat units and cause Fuchs endothelial corneal dystrophy. Multiple alternatively spliced transcript variants that encode different proteins have been described. [provided by RefSeq, Jul 2016]

TCF4 Gene-Disease associations (from GenCC):

• Pitt-Hopkins syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet, G2P, ClinGen
• corneal dystrophy, Fuchs endothelial, 3

  Inheritance: AD Classification: STRONG Submitted by: G2P
• autosomal dominant non-syndromic intellectual disability

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Fuchs' endothelial dystrophy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• autism spectrum disorder

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• intellectual disability

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.4 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TCF4	NM_001083962.2	c.145+57262C>T		intron_variant	Intron 3 of 19	ENST00000354452.8	NP_001077431.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TCF4	ENST00000354452.8	c.145+57262C>T		intron_variant	Intron 3 of 19	5	NM_001083962.2	ENSP00000346440.3

Frequencies

GnomAD3 genomes AF: 0.387 AC: 58700 AN: 151706 Hom.: 11476 Cov.: 32

Gnomad AFR AF: 0.394

Gnomad AMI AF: 0.433

Gnomad AMR AF: 0.404

Gnomad ASJ AF: 0.396

Gnomad EAS AF: 0.395

Gnomad SAS AF: 0.415

Gnomad FIN AF: 0.364

Gnomad MID AF: 0.570

Gnomad NFE AF: 0.377

Gnomad OTH AF: 0.428

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.387 AC: 58752 AN: 151824 Hom.: 11491 Cov.: 32 AF XY: 0.388 AC XY: 28750 AN XY: 74182

African (AFR) AF: 0.394 AC: 16298 AN: 41358

American (AMR) AF: 0.404 AC: 6168 AN: 15276

Ashkenazi Jewish (ASJ) AF: 0.396 AC: 1373 AN: 3466

East Asian (EAS) AF: 0.395 AC: 2041 AN: 5168

South Asian (SAS) AF: 0.415 AC: 1999 AN: 4816

European-Finnish (FIN) AF: 0.364 AC: 3829 AN: 10524

Middle Eastern (MID) AF: 0.571 AC: 168 AN: 294

European-Non Finnish (NFE) AF: 0.377 AC: 25583 AN: 67902

Other (OTH) AF: 0.426 AC: 899 AN: 2110

Alfa AF: 0.383 Hom.: 18436

Bravo AF: 0.390

Asia WGS AF: 0.398 AC: 1380 AN: 3476

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	6.6
DANN	Benign	0.67
PhyloP100		0.69
Mutation Taster		=100/0	polymorphism (auto)

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: rs7240986; hg19: chr18-53195249;