chr19-10825132-C-A

Variant names:

• chr19-10825132-C-A
• rs772920450
• NM_001005361.3:c.1969C>A

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001005361.3(DNM2):​c.1969C>A​(p.Arg657Ser) 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 pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R657H) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DNM2 NM_001005361.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.76
• Publications: 1 publications found

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]

DNM2 Gene-Disease associations (from GenCC):

• autosomal dominant centronuclear myopathy

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: ClinGen, Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• Charcot-Marie-Tooth disease

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• Charcot-Marie-Tooth disease dominant intermediate B

  Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet
• autosomal dominant Charcot-Marie-Tooth disease type 2M

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• fetal akinesia-cerebral and retinal hemorrhage syndrome

  Inheritance: AR Classification: SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet
• hereditary spastic paraplegia

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.886

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNM2	NM_001005361.3	c.1969C>A	p.Arg657Ser	missense_variant	Exon 18 of 21	ENST00000389253.9	NP_001005361.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNM2	ENST00000389253.9	c.1969C>A	p.Arg657Ser	missense_variant	Exon 18 of 21	5	NM_001005361.3	ENSP00000373905.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Uncertain	0.16	D
BayesDel_noAF	Uncertain	-0.010
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.55	.;.;.;D;.
Eigen	Uncertain	0.36
Eigen_PC	Uncertain	0.28
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.95	D;D;D;D;D
M_CAP	Uncertain	0.099	D
MetaRNN	Pathogenic	0.89	D;D;D;D;D
MetaSVM	Uncertain	-0.010	T
MutationAssessor	Pathogenic	3.0	M;.;M;M;.
PhyloP100		2.8
PrimateAI	Pathogenic	0.81	D
PROVEAN	Pathogenic	-5.1	.;.;D;.;D
REVEL	Uncertain	0.40
Sift	Uncertain	0.021	.;.;D;.;D
Sift4G	Uncertain	0.0080	D;D;D;D;D
Polyphen		0.52, 0.97	.;P;.;D;.
Vest4		0.90
MutPred		0.76		Loss of MoRF binding (P = 0.0487);.;Loss of MoRF binding (P = 0.0487);Loss of MoRF binding (P = 0.0487);.;
MVP		0.82
MPC		2.2
ClinPred		0.99	D
GERP RS		4.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.89
gMVP		0.94
Mutation Taster		=50/50

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

Other links and lift over

dbSNP: rs772920450; hg19: chr19-10935808;