rs120074165

Variant names:

• chr18-49118866-A-G
• rs120074165
• NM_001353214.3:c.1789T>C

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM2 PP3_Strong PP5

The NM_001353214.3(DYM):​c.1789T>C​(p.Cys597Arg) 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 Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 31)
• Consequence: DYM NM_001353214.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.29
• Publications: 3 publications found

Genes affected

DYM (HGNC:21317): (dymeclin) This gene encodes a protein which regulates Golgi-associated secretory pathways that are essential to endochondral bone formation during early development. This gene is also believed to play a role in early brain development. This gene is widely expressed in embryos and is particularly abundant in chodrocytes and brain tissues. It encodes a peripheral membrane protein which shuttles between the cytosol and Golgi complex. Mutations in this gene are associated with two types of recessive osteochondrodysplasia: Dyggve-Melchior-Clausen (DMC) dysplasia and Smith-McCort (SMC) dysplasia. [provided by RefSeq, Jun 2017]

DYM Gene-Disease associations (from GenCC):

• Dyggve-Melchior-Clausen disease

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics, Orphanet
• Smith-McCort dysplasia 1

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• Smith-McCort dysplasia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000265128 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.982
• PP5: Variant 18-49118866-A-G is Pathogenic according to our data. Variant chr18-49118866-A-G is described in ClinVar as Pathogenic. ClinVar VariationId is 3193.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001353214.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DYM	NM_001353214.3	MANE Select	c.1789T>C	p.Cys597Arg	missense	Exon 16 of 18	NP_001340143.1
	DYM	NM_001374428.1		c.1789T>C	p.Cys597Arg	missense	Exon 17 of 19	NP_001361357.1
	DYM	NM_001353212.3		c.1786T>C	p.Cys596Arg	missense	Exon 16 of 18	NP_001340141.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DYM	ENST00000675505.1	MANE Select	c.1789T>C	p.Cys597Arg	missense	Exon 16 of 18	ENSP00000501694.1
	DYM	ENST00000269445.10	TSL:1	c.1624T>C	p.Cys542Arg	missense	Exon 15 of 17	ENSP00000269445.6
	DYM	ENST00000442713.6	TSL:2	c.1054T>C	p.Cys352Arg	missense	Exon 10 of 12	ENSP00000395942.2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Smith-McCort dysplasia 1 Pathogenic:1

Jan 01, 2009

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.44	D
BayesDel_noAF	Pathogenic	0.39
CADD	Pathogenic	31
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.94	D
Eigen	Pathogenic	0.90
Eigen_PC	Pathogenic	0.88
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D
M_CAP	Pathogenic	0.46	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Uncertain	0.60	D
MutationAssessor	Uncertain	2.8	M
PhyloP100		9.3
PrimateAI	Pathogenic	0.89	D
PROVEAN	Pathogenic	-10	D
REVEL	Pathogenic	0.93
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0030	D
Polyphen		1.0	D
Vest4		0.98
MutPred		0.89		Gain of disorder (P = 0.0157)
MVP		0.95
MPC		0.55
ClinPred		1.0	D
GERP RS		5.8
Varity_R		0.97
gMVP		0.75
Mutation Taster		=6/94	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: rs120074165; hg19: chr18-46645236;