Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PM2PP2BP4_ModerateBP6_Moderate
The NM_001083962.2(TCF4):āc.209A>Gā(p.Asn70Ser) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000031 in 1,610,838 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (ā ).
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]
Verdict is Likely_benign. Variant got -1 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
PP2
Missense variant in gene, where missense usually causes diseases (based on misZ statistic), TCF4. . Gene score misZ 4.1035 (greater than the threshold 3.09). Trascript score misZ 4.5676 (greater than threshold 3.09). GenCC has associacion of gene with intellectual disability, corneal dystrophy, Fuchs endothelial, 3, autosomal dominant non-syndromic intellectual disability, autism spectrum disorder, Fuchs' endothelial dystrophy, Pitt-Hopkins syndrome.
BP4
Computational evidence support a benign effect (MetaRNN=0.080123216).
BP6
Variant 18-55461114-T-C is Benign according to our data. Variant chr18-55461114-T-C is described in ClinVar as [Benign]. Clinvar id is 468955.Status of the report is criteria_provided_single_submitter, 1 stars.