Variant 2-238848228-T-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1PM2BP4_Moderate

The NM_001271893.4(TWIST2):c.13T>A(p.Ser5Thr) variant causes a missense change. The variant allele was found at a frequency of 0.000000774 in 1,292,088 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 (no stars).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 7.7e-7 ( 0 hom. )

Consequence

TWIST2
NM_001271893.4 missense

Scores

Clinical Significance

Uncertain significance no assertion criteria provided U:1

Conservation

PhyloP100: 4.76

Variant links:

Genes affected

TWIST2 (HGNC:20670): (twist family bHLH transcription factor 2) The protein encoded by this gene is a basic helix-loop-helix type transcription factor and shares similarity with Twist. This protein may inhibit osteoblast maturation and maintain cells in a preosteoblast phenotype during osteoblast development. This gene may be upregulated in certain cancers. Mutations in this gene cause focal facial dermal dysplasia 3, Setleis type. Two transcript variants encoding the same protein have been found. [provided by RefSeq, Apr 2014]

TWIST2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM1

In a chain Twist-related protein 2 (size 159) in uniprot entity TWST2_HUMAN there are 5 pathogenic changes around while only 1 benign (83%) in NM_001271893.4

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.25917426).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
TWIST2	NM_001271893.4 linkuse as main transcript	c.13T>A	p.Ser5Thr	missense_variant	1/2	ENST00000612363.2
TWIST2	NM_057179.3 linkuse as main transcript	c.13T>A	p.Ser5Thr	missense_variant	1/2
TWIST2	XR_007069137.1 linkuse as main transcript	n.144T>A		non_coding_transcript_exon_variant	1/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
TWIST2	ENST00000612363.2 linkuse as main transcript	c.13T>A	p.Ser5Thr	missense_variant	1/2	1	NM_001271893.4	P1
TWIST2	ENST00000448943.2 linkuse as main transcript	c.13T>A	p.Ser5Thr	missense_variant	1/2	1		P1
TWIST2	ENST00000710607.1 linkuse as main transcript	c.13T>A	p.Ser5Thr	missense_variant	1/2			P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

7.74e-7

AC:

AN:

1292088

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

628472

show subpopulations

Gnomad4 AFR exome

AF:

0.0000367

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

TWIST2-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jun 10, 2024

The TWIST2 c.13T>A variant is predicted to result in the amino acid substitution p.Ser5Thr. To our knowledge, this variant has not been reported in the literature or in a large population database, indicating this variant is rare. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.069

BayesDel_addAF

Pathogenic

0.18

BayesDel_noAF

Uncertain

0.020

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.13

T;T

Eigen

Benign

-0.13

Eigen_PC

Benign

-0.023

FATHMM_MKL

Uncertain

0.89

LIST_S2

Benign

0.80

.;T

M_CAP

Pathogenic

0.72

MetaRNN

Benign

0.26

T;T

MetaSVM

Uncertain

0.51

MutationAssessor

Benign

1.6

L;L

MutationTaster

Benign

1.0

PrimateAI

Pathogenic

0.80

PROVEAN

Benign

-0.82

N;.

REVEL

Uncertain

0.40

Sift

Benign

0.13

T;.

Sift4G

Benign

0.35

T;T

Polyphen

0.0020

B;B

Vest4

0.37

MutPred

0.16

Gain of glycosylation at S5 (P = 0.029);Gain of glycosylation at S5 (P = 0.029);

MVP

0.96

MPC

1.5

ClinPred

0.51

GERP RS

3.5

Varity_R

0.13

gMVP

0.62

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over