19-1611748-G-C

Position:

• chr19-1611748-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_003200.5(TCF3):​c.1924C>G​(p.Pro642Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: TCF3 NM_003200.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.80

Genes affected

TCF3 (HGNC:11633): (transcription factor 3) This gene encodes a member of the E protein (class I) family of helix-loop-helix transcription factors. E proteins activate transcription by binding to regulatory E-box sequences on target genes as heterodimers or homodimers, and are inhibited by heterodimerization with inhibitor of DNA-binding (class IV) helix-loop-helix proteins. E proteins play a critical role in lymphopoiesis, and the encoded protein is required for B and T lymphocyte development. Deletion of this gene or diminished activity of the encoded protein may play a role in lymphoid malignancies. This gene is also involved in several chromosomal translocations that are associated with lymphoid malignancies including pre-B-cell acute lymphoblastic leukemia (t(1;19), with PBX1), childhood leukemia (t(19;19), with TFPT) and acute leukemia (t(12;19), with ZNF384). Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene, and a pseudogene of this gene is located on the short arm of chromosome 9. [provided by RefSeq, Sep 2011]

TCF3 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TCF3	NM_003200.5	c.1924C>G	p.Pro642Ala	missense_variant	19/19	ENST00000262965.12	NP_003191.1
TCF3	NM_001136139.4	c.1915C>G	p.Pro639Ala	missense_variant	19/20	ENST00000588136.7	NP_001129611.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TCF3	ENST00000262965.12	c.1924C>G	p.Pro642Ala	missense_variant	19/19	1	NM_003200.5	ENSP00000262965.5
TCF3	ENST00000588136.7	c.1915C>G	p.Pro639Ala	missense_variant	19/20	2	NM_001136139.4	ENSP00000468487.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 07, 2022

This variant has not been reported in the literature in individuals affected with TCF3-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces proline, which is neutral and non-polar, with alanine, which is neutral and non-polar, at codon 642 of the TCF3 protein (p.Pro642Ala). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt TCF3 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.059
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.080
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.80	D;T;T;D;T;T;.;.;.
Eigen	Uncertain	0.47
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.87	D;D;D;.;D;D;D;D;D
M_CAP	Benign	0.063	D
MetaRNN	Uncertain	0.56	D;D;D;D;D;D;D;D;D
MetaSVM	Benign	-0.76	T
MutationAssessor	Uncertain	2.5	M;.;.;M;.;.;.;.;.
PrimateAI	Uncertain	0.54	T
PROVEAN	Pathogenic	-5.5	D;.;.;.;.;.;.;.;D
REVEL	Uncertain	0.30
Sift	Uncertain	0.0050	D;.;.;.;.;.;.;.;D
Sift4G	Benign	0.12	T;T;T;T;T;T;T;T;T
Polyphen		1.0	D;.;.;D;.;.;.;D;.
Vest4		0.54
MutPred		0.28		.;.;.;.;.;.;.;.;Loss of glycosylation at P646 (P = 0.05);
MVP		0.66
MPC		0.26
ClinPred		0.98	D
GERP RS		2.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.2
Varity_R		0.21
gMVP		0.71

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-1611747; COSMIC: COSV53647967; COSMIC: COSV53647967;