Variant 2-238848306-C-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1PM2BP4

The NM_001271893.4(TWIST2):c.91C>G(p.Arg31Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Consequence

TWIST2
NM_001271893.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.34

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 3 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=0.35597008).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
TWIST2	NM_001271893.4 linkuse as main transcript	c.91C>G	p.Arg31Gly	missense_variant	1/2	ENST00000612363.2
TWIST2	NM_057179.3 linkuse as main transcript	c.91C>G	p.Arg31Gly	missense_variant	1/2
TWIST2	XR_007069137.1 linkuse as main transcript	n.222C>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.91C>G	p.Arg31Gly	missense_variant	1/2	1	NM_001271893.4	P1
TWIST2	ENST00000448943.2 linkuse as main transcript	c.91C>G	p.Arg31Gly	missense_variant	1/2	1		P1
TWIST2	ENST00000710607.1 linkuse as main transcript	c.91C>G	p.Arg31Gly	missense_variant	1/2			P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 30, 2024

The c.91C>G (p.R31G) alteration is located in exon 1 (coding exon 1) of the TWIST2 gene. This alteration results from a C to G substitution at nucleotide position 91, causing the arginine (R) at amino acid position 31 to be replaced by a glycine (G). 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

Uncertain

0.44

BayesDel_addAF

Pathogenic

0.17

BayesDel_noAF

Uncertain

0.0

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.46

T;T

Eigen

Uncertain

0.20

Eigen_PC

Benign

0.20

FATHMM_MKL

Benign

0.73

LIST_S2

Uncertain

0.92

.;D

M_CAP

Pathogenic

0.49

MetaRNN

Benign

0.36

T;T

MetaSVM

Pathogenic

0.84

MutationAssessor

Benign

1.9

M;M

MutationTaster

Benign

0.98

PrimateAI

Pathogenic

0.86

PROVEAN

Uncertain

-2.6

D;.

REVEL

Uncertain

0.60

Sift

Benign

0.091

T;.

Sift4G

Uncertain

0.0070

D;D

Polyphen

0.70

P;P

Vest4

0.20

MutPred

0.24

Loss of MoRF binding (P = 0.0736);Loss of MoRF binding (P = 0.0736);

MVP

0.99

MPC

2.0

ClinPred

0.93

GERP RS

2.8

Varity_R

0.22

gMVP

0.90

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