2-219418469-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1 PM2 BP4_Moderate

The NM_001927.4(DES):c.7C>G(p.Gln3Glu) 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. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q3R) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: DES NM_001927.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.13

Genes affected

DES (HGNC:2770): (desmin) This gene encodes a muscle-specific class III intermediate filament. Homopolymers of this protein form a stable intracytoplasmic filamentous network connecting myofibrils to each other and to the plasma membrane. Mutations in this gene are associated with desmin-related myopathy, a familial cardiac and skeletal myopathy (CSM), and with distal myopathies. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 7 uncertain in NM_001927.4
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.19047448).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DES	NM_001927.4	c.7C>G	p.Gln3Glu	missense_variant	1/9	ENST00000373960.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DES	ENST00000373960.4	c.7C>G	p.Gln3Glu	missense_variant	1/9	1	NM_001927.4	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

DES-related disorder Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Dec 29, 2023

The DES c.7C>G variant is predicted to result in the amino acid substitution p.Gln3Glu. 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	0.10
CardioboostCm	Benign	0.0036
BayesDel_addAF	Benign	0.011	T
BayesDel_noAF	Benign	-0.22
Cadd	Benign	23
Dann	Uncertain	0.98
DEOGEN2	Benign	0.061	T
Eigen	Benign	-0.16
Eigen_PC	Benign	0.028
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.78	T
M_CAP	Uncertain	0.14	D
MetaRNN	Benign	0.19	T
MetaSVM	Benign	-0.52	T
MutationAssessor	Benign	0.90	L
MutationTaster	Benign	0.99	D
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	-0.15	N
REVEL	Benign	0.17
Sift	Benign	0.53	T
Sift4G	Benign	0.98	T
Polyphen		0.13	B
Vest4		0.26
MutPred		0.27		Loss of MoRF binding (P = 0.0053);
MVP		0.86
MPC		0.97
ClinPred		0.32	T
GERP RS		4.5
Varity_R		0.22
gMVP		0.47

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.

Other links and lift over

hg19: chr2-220283191;