19-10775798-C-A

Position:

• chr19-10775798-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_001005361.3(DNM2):​c.481C>A​(p.Leu161Met) 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. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: DNM2 NM_001005361.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.410

Genes affected

DNM2 (HGNC:2974): (dynamin 2) Dynamins represent one of the subfamilies of GTP-binding proteins. These proteins share considerable sequence similarity over the N-terminal portion of the molecule, which contains the GTPase domain. Dynamins are associated with microtubules. They have been implicated in cell processes such as endocytosis and cell motility, and in alterations of the membrane that accompany certain activities such as bone resorption by osteoclasts. Dynamins bind many proteins that bind actin and other cytoskeletal proteins. Dynamins can also self-assemble, a process that stimulates GTPase activity. Five alternatively spliced transcripts encoding different proteins have been described. Additional alternatively spliced transcripts may exist, but their full-length nature has not been determined. [provided by RefSeq, Jun 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), DNM2. . Gene score misZ 3.4829 (greater than the threshold 3.09). Trascript score misZ 4.8575 (greater than threshold 3.09). GenCC has associacion of gene with fetal akinesia-cerebral and retinal hemorrhage syndrome, Charcot-Marie-Tooth disease dominant intermediate B, hereditary spastic paraplegia, Charcot-Marie-Tooth disease, autosomal dominant centronuclear myopathy, autosomal dominant Charcot-Marie-Tooth disease type 2M.
• BP4: Computational evidence support a benign effect (MetaRNN=0.13386199).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DNM2	NM_001005361.3	c.481C>A	p.Leu161Met	missense_variant	4/21	ENST00000389253.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DNM2	ENST00000389253.9	c.481C>A	p.Leu161Met	missense_variant	4/21	5	NM_001005361.3	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Charcot-Marie-Tooth disease dominant intermediate B Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jun 30, 2023

This variant has not been reported in the literature in individuals affected with DNM2-related conditions. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on DNM2 protein function. ClinVar contains an entry for this variant (Variation ID: 411952). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces leucine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 161 of the DNM2 protein (p.Leu161Met). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.071
BayesDel_addAF	Uncertain	0.066	T
BayesDel_noAF	Benign	-0.14
CADD	Benign	21
DANN	Benign	0.85
DEOGEN2	Uncertain	0.63	.;.;.;D;.;T
Eigen	Benign	-0.43
Eigen_PC	Benign	-0.29
FATHMM_MKL	Benign	0.54	D
LIST_S2	Benign	0.79	T;T;T;T;T;T
M_CAP	Benign	0.047	D
MetaRNN	Benign	0.13	T;T;T;T;T;T
MetaSVM	Uncertain	0.18	D
MutationAssessor	Benign	0.42	N;N;N;N;N;.
MutationTaster	Benign	0.99	D;D;D;D;D;D
PrimateAI	Uncertain	0.57	T
PROVEAN	Benign	0.65	.;N;N;N;N;.
REVEL	Benign	0.28
Sift	Benign	0.88	.;T;T;T;T;.
Sift4G	Benign	0.87	T;T;T;T;T;T
Polyphen		0.0070, 0.018	.;B;.;B;.;.
Vest4		0.30
MutPred		0.57		Loss of catalytic residue at L161 (P = 0.2235);Loss of catalytic residue at L161 (P = 0.2235);Loss of catalytic residue at L161 (P = 0.2235);Loss of catalytic residue at L161 (P = 0.2235);Loss of catalytic residue at L161 (P = 0.2235);.;
MVP		0.70
MPC		0.97
ClinPred		0.16	T
GERP RS		4.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.093
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

Other links and lift over

dbSNP: rs1060503547; hg19: chr19-10886474;