rs17512836

Positions:

• chr18-55527730-T-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BS1 BS2

The NM_001083962.2(TCF4):​c.145+57550A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0213 in 152,300 control chromosomes in the GnomAD database, including 67 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 0.021 (67 hom., cov: 32)
• Consequence: TCF4 NM_001083962.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.107

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]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.86).
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.0213 (3250/152300) while in subpopulation NFE AF= 0.026 (1767/68030). AF 95% confidence interval is 0.025. There are 67 homozygotes in gnomad4. There are 1616 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 3250 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TCF4	NM_001083962.2	c.145+57550A>G		intron_variant		ENST00000354452.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TCF4	ENST00000354452.8	c.145+57550A>G		intron_variant		5	NM_001083962.2	P3

Frequencies

GnomAD3 genomes AF: 0.0214 AC: 3254 AN: 152182 Hom.: 67 Cov.: 32

Gnomad AFR AF: 0.00483

Gnomad AMI AF: 0.202

Gnomad AMR AF: 0.0249

Gnomad ASJ AF: 0.0657

Gnomad EAS AF: 0.000192

Gnomad SAS AF: 0.00414

Gnomad FIN AF: 0.0385

Gnomad MID AF: 0.0222

Gnomad NFE AF: 0.0260

Gnomad OTH AF: 0.0272

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

GnomAD4 genome AF: 0.0213 AC: 3250 AN: 152300 Hom.: 67 Cov.: 32 AF XY: 0.0217 AC XY: 1616 AN XY: 74468

Gnomad4 AFR AF: 0.00479

Gnomad4 AMR AF: 0.0248

Gnomad4 ASJ AF: 0.0657

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.00414

Gnomad4 FIN AF: 0.0385

Gnomad4 NFE AF: 0.0260

Gnomad4 OTH AF: 0.0270

Alfa AF: 0.0274 Hom.: 61

Bravo AF: 0.0206

Asia WGS AF: 0.00231 AC: 9 AN: 3476

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.86
CADD	Benign	1.9
DANN	Benign	0.62

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

LitVar

Other links and lift over

dbSNP: rs17512836; hg19: chr18-53194961;