Variant 2-238848629-C-G 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.414C>G(p.His138Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000216 in 1,390,530 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: 0.0000022 ( 0 hom. )

Consequence

TWIST2
NM_001271893.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.49

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.414C>G	p.His138Gln	missense_variant	1/2	ENST00000612363.2
TWIST2	NM_057179.3 linkuse as main transcript	c.414C>G	p.His138Gln	missense_variant	1/2
TWIST2	XR_007069137.1 linkuse as main transcript	n.545C>G		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.414C>G	p.His138Gln	missense_variant	1/2	1	NM_001271893.4	P1
TWIST2	ENST00000448943.2 linkuse as main transcript	c.414C>G	p.His138Gln	missense_variant	1/2	1		P1
TWIST2	ENST00000710607.1 linkuse as main transcript	c.414C>G	p.His138Gln	missense_variant	1/2			P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000216

AC:

AN:

1390530

Hom.:

Cov.:

AF XY:

0.00000437

AC XY:

AN XY:

686694

show subpopulations

Gnomad4 AFR exome

AF:

0.0000946

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.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Aug 27, 2019

Not observed in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.63

BayesDel_addAF

Pathogenic

0.27

BayesDel_noAF

Pathogenic

0.14

CADD

Uncertain

DANN

Uncertain

0.98

DEOGEN2

Uncertain

0.52

D;D

Eigen

Benign

0.15

Eigen_PC

Benign

0.17

FATHMM_MKL

Uncertain

0.81

M_CAP

Pathogenic

0.39

MetaRNN

Uncertain

0.52

D;D

MetaSVM

Pathogenic

0.86

MutationAssessor

Uncertain

2.3

M;M

MutationTaster

Benign

1.0

PrimateAI

Pathogenic

0.83

PROVEAN

Pathogenic

-6.8

D;.

REVEL

Pathogenic

0.74

Sift

Benign

0.041

D;.

Sift4G

Benign

0.074

T;T

Polyphen

0.64

P;P

Vest4

0.70

MutPred

0.43

Loss of loop (P = 0.0374);Loss of loop (P = 0.0374);

MVP

1.0

MPC

1.9

ClinPred

0.71

GERP RS

3.2

Varity_R

0.48

gMVP

0.92

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over