1-150508228-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_004425.4(ECM1):c.19G>A(p.Ala7Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ECM1 NM_004425.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.02

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ECM1	NM_004425.4	c.19G>A	p.Ala7Thr	missense_variant	1/10	ENST00000369047.9
ECM1	NM_001202858.2	c.19G>A	p.Ala7Thr	missense_variant	1/10
ECM1	NM_022664.3	c.19G>A	p.Ala7Thr	missense_variant	1/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ECM1	ENST00000369047.9	c.19G>A	p.Ala7Thr	missense_variant	1/10	1	NM_004425.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 08, 2021

The c.19G>A (p.A7T) alteration is located in exon 1 (coding exon 1) of the ECM1 gene. This alteration results from a G to A substitution at nucleotide position 19, causing the alanine (A) at amino acid position 7 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Uncertain	0.042	T
BayesDel_noAF	Benign	-0.18
Cadd	Benign	21
Dann	Uncertain	1.0
Eigen	Benign	0.15
Eigen_PC	Benign	0.053
FATHMM_MKL	Benign	0.34	N
LIST_S2	Benign	0.84	T;D;D
M_CAP	Benign	0.055	D
MetaRNN	Uncertain	0.43	T;T;T
MetaSVM	Benign	-0.57	T
MutationAssessor	Uncertain	2.3	M;M;M
MutationTaster	Benign	0.99	N;N;N
PrimateAI	Benign	0.39	T
PROVEAN	Uncertain	-2.4	N;N;N
REVEL	Uncertain	0.56
Sift	Uncertain	0.0040	D;D;D
Sift4G	Uncertain	0.0070	D;D;D
Polyphen		0.98	D;D;P
Vest4		0.23
MutPred		0.78		Loss of methylation at R6 (P = 0.0798);Loss of methylation at R6 (P = 0.0798);Loss of methylation at R6 (P = 0.0798);
MVP		0.87
MPC		0.28
ClinPred		0.90	D
GERP RS		2.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.17
gMVP		0.56

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

Publications

LitVar

Other links and lift over

dbSNP: rs1290214107; hg19: chr1-150480704;