NM_004425.4:c.499T>G

Variant names:

• chr1-150510989-T-G
• rs121909116
• NM_004425.4:c.499T>G

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM2 PM5 PP3_Strong

The NM_004425.4(ECM1):​c.499T>G​(p.Phe167Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,461,870 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. F167I) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: ECM1 NM_004425.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.84
• Publications: 1 publications found

Genes affected

ECM1 (HGNC:3153): (extracellular matrix protein 1) This gene encodes a soluble protein that is involved in endochondral bone formation, angiogenesis, and tumor biology. It also interacts with a variety of extracellular and structural proteins, contributing to the maintenance of skin integrity and homeostasis. Mutations in this gene are associated with lipoid proteinosis disorder (also known as hyalinosis cutis et mucosae or Urbach-Wiethe disease) that is characterized by generalized thickening of skin, mucosae and certain viscera. Alternatively spliced transcript variants encoding distinct isoforms have been described for this gene. [provided by RefSeq, Feb 2011]

ECM1 Gene-Disease associations (from GenCC):

• lipoid proteinosis

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, G2P, Orphanet

ENSG00000307101 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr1-150510989-T-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 7476.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.979

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ECM1	NM_004425.4	c.499T>G	p.Phe167Val	missense_variant	Exon 6 of 10	ENST00000369047.9	NP_004416.2
ECM1	NM_001202858.2	c.580T>G	p.Phe194Val	missense_variant	Exon 6 of 10		NP_001189787.1
ECM1	NM_022664.3	c.499T>G	p.Phe167Val	missense_variant	Exon 6 of 9		NP_073155.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ECM1	ENST00000369047.9	c.499T>G	p.Phe167Val	missense_variant	Exon 6 of 10	1	NM_004425.4	ENSP00000358043.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461870 Hom.: 0 Cov.: 35 AF XY: 0.00000138 AC XY: 1 AN XY: 727232

African (AFR) AF: 0.0000299 AC: 1 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

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

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53412

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

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111998

Other (OTH) AF: 0.0000166 AC: 1 AN: 60394

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

ECM1-related disorder Uncertain:1

Nov 17, 2022

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The ECM1 c.499T>G variant is predicted to result in the amino acid substitution p.Phe167Val. To our knowledge, this variant has not been reported in the literature or in a large population database (http://gnomad.broadinstitute.org), indicating this variant is rare. Two alternate missense changes affecting the same amino acid have been reported in affected individuals (p.Phe167Leu, p.Phe167Ile; Chan et al. 2007. PubMed ID: 17927570; Reported as p.Phe194Ile in Table S1, Capalbo et al. 2019. PubMed ID: 31589614; Table 2, Hamada et al. 2003. PubMed ID: 12603844). Although we suspect the p.Phe167Val change could be pathogenic, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.95
BayesDel_addAF	Pathogenic	0.33	D
BayesDel_noAF	Pathogenic	0.23
CADD	Uncertain	26
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.62	.;D;.
Eigen	Uncertain	0.67
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.84	T;T;T
M_CAP	Uncertain	0.13	D
MetaRNN	Pathogenic	0.98	D;D;D
MetaSVM	Uncertain	0.26	D
MutationAssessor	Uncertain	2.3	.;M;M
PhyloP100		3.8
PrimateAI	Uncertain	0.52	T
PROVEAN	Pathogenic	-5.9	D;D;D
REVEL	Pathogenic	0.84
Sift	Pathogenic	0.0	D;D;D
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		1.0	D;D;D
Vest4		0.86
MutPred		0.91		.;Gain of glycosylation at P172 (P = 0.1062);Gain of glycosylation at P172 (P = 0.1062);
MVP		0.97
MPC		0.59
ClinPred		1.0	D
GERP RS		5.0
Varity_R		0.87
gMVP		0.81
Mutation Taster		=4/96	disease causing

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: rs121909116; hg19: chr1-150483465;