Genetic Variant TCF19:p.Gly197Cys (chr6-31161797-G-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_007109.3(TCF19):c.589G>T(p.Gly197Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,458,100 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

TCF19
NM_007109.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.189

Publications

0 publications found

Variant links:

Genes affected

TCF19 (HGNC:11629): (transcription factor 19) This gene encodes a protein that contains a PHD-type zinc finger domain and likely functions as a transcription factor. The encoded protein plays a role proliferation and apoptosis of pancreatic beta cells. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

TCF19 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TCF19	NM_007109.3 link	c.589G>T	p.Gly197Cys	missense_variant	Exon 3 of 4	ENST00000376257.8	NP_009040.2	Q9Y242A0A1U9X8M7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TCF19	ENST00000376257.8 link	c.589G>T	p.Gly197Cys	missense_variant	Exon 3 of 4	1	NM_007109.3	ENSP00000365433.3		Q9Y242

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1458100

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

725258

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33432

American (AMR)

AF:

0.00

AC:

AN:

44522

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25840

East Asian (EAS)

AF:

0.00

AC:

AN:

39658

South Asian (SAS)

AF:

0.00

AC:

AN:

85904

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52192

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5748

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1110550

Other (OTH)

AF:

0.0000332

AC:

AN:

60254

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jun 03, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.589G>T (p.G197C) alteration is located in exon 3 (coding exon 2) of the TCF19 gene. This alteration results from a G to T substitution at nucleotide position 589, causing the glycine (G) at amino acid position 197 to be replaced by a cysteine (C). 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

Benign

0.11

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Benign

-0.48

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.048

T;T;.

Eigen

Benign

-0.27

Eigen_PC

Benign

-0.44

FATHMM_MKL

Benign

0.18

LIST_S2

Benign

0.67

.;T;T

M_CAP

Benign

0.014

MetaRNN

Benign

0.15

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.5

M;M;.

PhyloP100

0.19

PrimateAI

Benign

0.34

PROVEAN

Uncertain

-2.6

D;D;D

REVEL

Benign

0.034

Sift

Uncertain

0.0020

D;D;D

Sift4G

Uncertain

0.0080

D;D;D

Polyphen

0.96

D;D;.

Vest4

0.29

MutPred

0.24

Loss of phosphorylation at S195 (P = 0.1031);Loss of phosphorylation at S195 (P = 0.1031);.;

MVP

0.23

MPC

0.95

ClinPred

0.81

GERP RS

2.2

PromoterAI

0.0055

Neutral

(source)

Varity_R

0.27

gMVP

0.46

Mutation Taster

=93/7

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.37

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.37

Position offset: -4

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over