18-55464082-C-G

Variant names:

• chr18-55464082-C-G
• rs775657966
• NM_001083962.2:c.201G>C

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_001083962.2(TCF4):​c.201G>C​(p.Pro67Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000658 in 151,954 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. P67P) has been classified as Likely benign. The gene TCF4 is included in the ClinGen Criteria Specification Registry.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 31)
• Consequence: TCF4 NM_001083962.2 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0370
• Publications: 1 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-AS1 (HGNC:51642): (TCF4 antisense RNA 1)

ACMG classification

Specifications for TCF4 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.45).
• BP7: Synonymous conserved (PhyloP=-0.037 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001083962.2. 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
	TCF4	NM_001083962.2	MANE Select	c.201G>C	p.Pro67Pro	synonymous	Exon 4 of 20	NP_001077431.1	P15884-3
	TCF4	NM_001243226.3		c.507G>C	p.Pro169Pro	synonymous	Exon 5 of 21	NP_001230155.2	E9PH57
	TCF4	NM_001243228.2		c.201G>C	p.Pro67Pro	synonymous	Exon 4 of 20	NP_001230157.1	H3BTP3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TCF4	ENST00000354452.8	TSL:5 MANE Select	c.201G>C	p.Pro67Pro	synonymous	Exon 4 of 20	ENSP00000346440.3	P15884-3
	TCF4	ENST00000398339.5	TSL:1	c.507G>C	p.Pro169Pro	synonymous	Exon 5 of 21	ENSP00000381382.1	E9PH57
	TCF4	ENST00000356073.8	TSL:1	c.201G>C	p.Pro67Pro	synonymous	Exon 4 of 20	ENSP00000348374.4	P15884-1

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 151954 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 32

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 151954 Hom.: 0 Cov.: 31 AF XY: 0.0000135 AC XY: 1 AN XY: 74206

African (AFR) AF: 0.00 AC: 0 AN: 41368

American (AMR) AF: 0.00 AC: 0 AN: 15232

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5182

South Asian (SAS) AF: 0.00 AC: 0 AN: 4818

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10574

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68004

Other (OTH) AF: 0.00 AC: 0 AN: 2080

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.45
CADD	Benign	0.38
DANN	Benign	0.60
PhyloP100		-0.037

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: rs775657966; hg19: chr18-53131313;