rs927701240

Variant names:

• chr2-85283523-A-C
• rs927701240
• NM_031283.3:c.470A>C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PP3_Moderate BS2

The NM_031283.3(TCF7L1):​c.470A>C​(p.Asp157Ala) variant causes a missense change. The variant allele was found at a frequency of 0.00000547 in 1,461,884 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: TCF7L1 NM_031283.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.88

Genes affected

TCF7L1 (HGNC:11640): (transcription factor 7 like 1) This gene encodes a member of the T cell factor/lymphoid enhancer factor family of transcription factors. These transcription factors are activated by beta catenin, mediate the Wnt signaling pathway and are antagonized by the transforming growth factor beta signaling pathway. The encoded protein contains a high mobility group-box DNA binding domain and participates in the regulation of cell cycle genes and cellular senescence. [provided by RefSeq, Nov 2010]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PP3: MetaRNN computational evidence supports a deleterious effect, 0.853
• BS2: High AC in GnomAdExome4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TCF7L1	NM_031283.3	c.470A>C	p.Asp157Ala	missense_variant	Exon 4 of 12	ENST00000282111.4	NP_112573.1
TCF7L1	XM_006712109.3	c.470A>C	p.Asp157Ala	missense_variant	Exon 4 of 12		XP_006712172.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TCF7L1	ENST00000282111.4	c.470A>C	p.Asp157Ala	missense_variant	Exon 4 of 12	1	NM_031283.3	ENSP00000282111.3
TCF7L1	ENST00000442813.1	c.20A>C	p.Asp7Ala	missense_variant	Exon 5 of 6	5		ENSP00000388984.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461884 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 727240

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000629

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Oct 26, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.470A>C (p.D157A) alteration is located in exon 4 (coding exon 4) of the TCF7L1 gene. This alteration results from a A to C substitution at nucleotide position 470, causing the aspartic acid (D) at amino acid position 157 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.69
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.27
CADD	Pathogenic	27
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.46	T;.
Eigen	Uncertain	0.66
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Pathogenic	0.99	D;D
M_CAP	Pathogenic	0.29	D
MetaRNN	Pathogenic	0.85	D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Uncertain	2.6	M;.
PrimateAI	Uncertain	0.65	T
PROVEAN	Uncertain	-3.1	D;D
REVEL	Pathogenic	0.75
Sift	Uncertain	0.0010	D;D
Sift4G	Uncertain	0.035	D;D
Polyphen		1.0	D;.
Vest4		0.84
MutPred		0.66		Loss of ubiquitination at K152 (P = 0.0561);.;
MVP		0.83
MPC		1.0
ClinPred		0.99	D
GERP RS		5.3
Varity_R		0.48
gMVP		0.70

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: rs927701240; hg19: chr2-85510646;