Variant 2-238848244-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1PM2

The NM_001271893.4(TWIST2):c.29C>T(p.Ser10Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000149 in 1,343,508 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000015 ( 0 hom. )

Consequence

TWIST2
NM_001271893.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.51

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 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;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
TWIST2	NM_001271893.4 linkuse as main transcript	c.29C>T	p.Ser10Phe	missense_variant	1/2	ENST00000612363.2
TWIST2	NM_057179.3 linkuse as main transcript	c.29C>T	p.Ser10Phe	missense_variant	1/2
TWIST2	XR_007069137.1 linkuse as main transcript	n.160C>T		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.29C>T	p.Ser10Phe	missense_variant	1/2	1	NM_001271893.4	P1
TWIST2	ENST00000448943.2 linkuse as main transcript	c.29C>T	p.Ser10Phe	missense_variant	1/2	1		P1
TWIST2	ENST00000710607.1 linkuse as main transcript	c.29C>T	p.Ser10Phe	missense_variant	1/2			P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000886

AC:

AN:

112826

Hom.:

AF XY:

0.00

AC XY:

AN XY:

61962

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000515

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000149

AC:

AN:

1343508

Hom.:

Cov.:

AF XY:

0.00000152

AC XY:

AN XY:

657066

show subpopulations

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:

0.0000132

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.49e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Mar 11, 2024

Variant summary: TWIST2 c.29C>T (p.Ser10Phe) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 8.9e-06 in 112826 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. To our knowledge, no occurrence of c.29C>T in individuals affected with TWIST2-Related Disorders and no experimental evidence demonstrating its impact on protein function have been reported. No submitters have cited clinical-significance assessments for this variant to ClinVar. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.39

BayesDel_addAF

Pathogenic

0.32

BayesDel_noAF

Pathogenic

0.37

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.22

T;T

Eigen

Pathogenic

0.70

Eigen_PC

Uncertain

0.66

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.95

.;D

M_CAP

Pathogenic

0.84

MetaRNN

Uncertain

0.71

D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Uncertain

2.3

M;M

MutationTaster

Benign

1.0

PrimateAI

Pathogenic

0.89

PROVEAN

Benign

-2.0

N;.

REVEL

Pathogenic

0.70

Sift

Uncertain

0.0010

D;.

Sift4G

Benign

0.072

T;T

Polyphen

1.0

D;D

Vest4

0.54

MutPred

0.25

Loss of phosphorylation at S10 (P = 0.0012);Loss of phosphorylation at S10 (P = 0.0012);

MVP

0.99

MPC

1.9

ClinPred

0.71

GERP RS

4.7

Varity_R

0.30

gMVP

0.78

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