19-10823886-C-G

Variant names:

• chr19-10823886-C-G
• rs587783598
• NM_001005361.3:c.1880C>G

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PM1 PM2 PM5 PP3_Moderate PP5_Very_Strong

The NM_001005361.3(DNM2):​c.1880C>G​(p.Pro627Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P627H) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: DNM2 NM_001005361.3 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3 U:1
• Conservation: PhyloP100: 7.63
• Publications: 8 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: Pathogenic. The variant received 16 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 7 uncertain in NM_001005361.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr19-10823885-C-G is described in ClinVar as Pathogenic. ClinVar VariationId is 265656.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.905
• PP5: Variant 19-10823886-C-G is Pathogenic according to our data. Variant chr19-10823886-C-G is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 158520.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNM2	NM_001005361.3	c.1880C>G	p.Pro627Arg	missense_variant	Exon 17 of 21	ENST00000389253.9	NP_001005361.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNM2	ENST00000389253.9	c.1880C>G	p.Pro627Arg	missense_variant	Exon 17 of 21	5	NM_001005361.3	ENSP00000373905.4

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3 Uncertain:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Autosomal dominant centronuclear myopathy Pathogenic:1

Sep 21, 2022

Laboratory of Medical Genetics, National & Kapodistrian University of Athens

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

PM1, PM2, PM5, PP3, PP5 -

not provided Pathogenic:1

Aug 17, 2016

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The P627R mutation in the DNM2 gene has been reported previously in an affected mother and daughter who had childhood-onset centronuclear myopathy (CNM). They both had walking difficulties, reduced vital capacity, diffuse muscle weakness, and facial weakness (Bohm et al., 2012). Additionally, another missense mutation at the same position (P627H) and multiple missense mutations in nearby residues (A618T/D, S619L/W, L621P) have been reported in the Human Gene Mutation Database in association with CNM (Stenson et al., 2014). The P627R mutation is a non-conservative amino acid substitution that alters a highly conserved residue predicted to be within the linker domain between the pleckstrin homology (PH) domain and GTPase effector domain (GED) (Bohm et al., 2012). Therefore, the presence of the P672R mutation is consistent with a diagnosis of centronuclear myopathy -

Centronuclear myopathy Pathogenic:1

Feb 08, 2013

Genetic Services Laboratory, University of Chicago

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

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

Jan 06, 2016

Inherited Neuropathy Consortium Ii, University Of Miami

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.52	D
BayesDel_noAF	Pathogenic	0.51
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.88	.;.;.;D;.
Eigen	Uncertain	0.46
Eigen_PC	Uncertain	0.45
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D;D;D;D;D
M_CAP	Pathogenic	0.51	D
MetaRNN	Pathogenic	0.91	D;D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.1	M;.;M;M;.
PhyloP100		7.6
PrimateAI	Pathogenic	0.84	D
PROVEAN	Pathogenic	-7.7	.;.;D;.;D
REVEL	Pathogenic	0.90
Sift	Uncertain	0.0040	.;.;D;.;D
Sift4G	Uncertain	0.0090	D;D;D;D;D
Polyphen		0.47, 0.55	.;P;.;P;.
Vest4		0.87
MutPred		0.65		Gain of sheet (P = 0.0166);.;Gain of sheet (P = 0.0166);Gain of sheet (P = 0.0166);.;
MVP		0.98
MPC		1.6
ClinPred		1.0	D
GERP RS		4.9
RBP_binding_hub_radar		0.97
RBP_regulation_power_radar		2.7
Varity_R		0.67
gMVP		0.94
Mutation Taster		=1/99	disease causing (ClinVar)

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: rs587783598; hg19: chr19-10934562;