rs766449694

Variant names:

• chr19-10759731-CT-C
• rs766449694
• NM_001005361.3:c.162-6delT

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP7 BA1 BP4

This summary comes from the ClinGen Evidence Repository: The variant NM_001005361.3:c.162-6del in DNM2 is an intronic deletion variant. The highest population filtering allele frequency in gnomAD v4.1 is 0.0001715 (15/60000 alleles) in the Admixed American population, which is higher than the ClinGen Congenital Myopathies VCEP threshold (≥0.0000015) for BA1, and therefore meets this criterion (BA1). The c.162-6del variant is an intronic variant that is not predicted by SpliceAI to impact splicing. In addition, it occurs at a nucleotide that is not conserved as shown by UCSC Genome Browser (BP4, BP7). In summary, this variant meets the criteria to be classified as benign for autosomal dominant centronuclear myopathy based on the ACMG/AMP criteria applied, as specified by theClinGen Congenital Myopathies VCEP: BA1, BP4, BP7. (ClinGen Congenital Myopathies VCEP specifications version 1; 8/7/2024) LINK:https://erepo.genome.network/evrepo/ui/classification/CA9200718/MONDO:0018947/148

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 31)
  • Exomes 𝑓: 0.000014 (0 hom.)
• Consequence: DNM2 NM_001005361.3 splice_region, intron
• Clinical Significance: Benign reviewed by expert panel B:3
• Conservation: PhyloP100: 0.742
• Publications: 0 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: Labcorp Genetics (formerly Invitae), ClinGen, Ambry Genetics, Orphanet
• 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: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
• 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: Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet
• hereditary spastic paraplegia

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

LOC124904637 (HGNC:):

ACMG classification

Specifications for DNM2 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Benign. The variant received -10 ACMG points.

• BP4: For more information check the summary or visit ClinGen Evidence Repository.
• BP7: For more information check the summary or visit ClinGen Evidence Repository.
• BA1: For more information check the summary or visit ClinGen Evidence Repository.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001005361.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DNM2	NM_001005361.3	MANE Select	c.162-6delT		splice_region intron	N/A	NP_001005361.1	P50570-4
	DNM2	NM_001005360.3		c.162-6delT		splice_region intron	N/A	NP_001005360.1	P50570-1
	DNM2	NM_001190716.2		c.162-6delT		splice_region intron	N/A	NP_001177645.1	P50570-5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DNM2	ENST00000389253.9	TSL:5 MANE Select	c.162-6delT		splice_region intron	N/A	ENSP00000373905.4	P50570-4
	DNM2	ENST00000355667.11	TSL:1	c.162-6delT		splice_region intron	N/A	ENSP00000347890.6	P50570-1
	DNM2	ENST00000585892.5	TSL:1	c.162-6delT		splice_region intron	N/A	ENSP00000468734.1	P50570-5

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152188 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000557 AC: 14 AN: 251494 AF XY: 0.0000147

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000318

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.0000137 AC: 20 AN: 1461866 Hom.: 0 Cov.: 31 AF XY: 0.00000688 AC XY: 5 AN XY: 727232

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.000291 AC: 13 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53402

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1112006

Other (OTH) AF: 0.0000662 AC: 4 AN: 60396

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152188 Hom.: 0 Cov.: 31 AF XY: 0.0000269 AC XY: 2 AN XY: 74354

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 41440

American (AMR) AF: 0.000131 AC: 2 AN: 15276

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5194

South Asian (SAS) AF: 0.00 AC: 0 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68038

Other (OTH) AF: 0.00 AC: 0 AN: 2090

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.000203476), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.0000508 Hom.: 0

Bravo AF: 0.0000113

ClinVar

ClinVar submissions

Significance: Benign

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
-	-	1	Centronuclear myopathy (1)
-	-	1	Charcot-Marie-Tooth disease dominant intermediate B (1)
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		0.74

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: rs766449694; hg19: chr19-10870407;