2-232484141-C-T

Variant names:

• chr2-232484141-C-T
• rs41265123
• NM_004826.4:c.1267G>A
• ECEL1 p.Glu423Lys

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM1 PM2

The NM_004826.4(ECEL1):​c.1267G>A​(p.Glu423Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000062 in 1,613,614 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E423Q) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: ECEL1 NM_004826.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.85
• Publications: 9 publications found

Genes affected

ECEL1 (HGNC:3147): (endothelin converting enzyme like 1) This gene encodes a member of the M13 family of endopeptidases. Members of this family are zinc-containing type II integral-membrane proteins that are important regulators of neuropeptide and peptide hormone activity. Mutations in this gene are associated with autosomal recessive distal arthrogryposis, type 5D. This gene has multiple pseudogenes on chromosome 2. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Mar 2014]

ECEL1 Gene-Disease associations (from GenCC):

• distal arthrogryposis type 5D

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 2 uncertain in NM_004826.4
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004826.4. 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
	ECEL1	NM_004826.4	MANE Select	c.1267G>A	p.Glu423Lys	missense	Exon 7 of 18	NP_004817.2	A0A6F7YIA8
	ECEL1	NM_001290787.2		c.1267G>A	p.Glu423Lys	missense	Exon 7 of 18	NP_001277716.1	O95672-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ECEL1	ENST00000304546.6	TSL:1 MANE Select	c.1267G>A	p.Glu423Lys	missense	Exon 7 of 18	ENSP00000302051.1	O95672-1
	ECEL1	ENST00000409941.1	TSL:1	c.1267G>A	p.Glu423Lys	missense	Exon 6 of 17	ENSP00000386333.1	O95672-2
	ECEL1	ENST00000862796.1		c.1267G>A	p.Glu423Lys	missense	Exon 7 of 18	ENSP00000532855.1

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152232 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461382 Hom.: 0 Cov.: 33 AF XY: 0.00000825 AC XY: 6 AN XY: 727004

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

American (AMR) AF: 0.00 AC: 0 AN: 44722

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

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39700

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86252

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52948

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 0.00000540 AC: 6 AN: 1111994

Other (OTH) AF: 0.00 AC: 0 AN: 60390

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152232 Hom.: 0 Cov.: 33 AF XY: 0.0000269 AC XY: 2 AN XY: 74366

African (AFR) AF: 0.0000241 AC: 1 AN: 41458

American (AMR) AF: 0.00 AC: 0 AN: 15292

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 5192

South Asian (SAS) AF: 0.00 AC: 0 AN: 4834

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10624

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

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68038

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.00 Hom.: 5

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Uncertain	0.069	T
BayesDel_noAF	Benign	-0.14
CADD	Benign	23
DANN	Benign	0.38
DEOGEN2	Benign	0.16	T
Eigen	Benign	-0.47
Eigen_PC	Benign	-0.31
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.91	D
M_CAP	Benign	0.035	D
MetaRNN	Uncertain	0.48	T
MetaSVM	Benign	-0.82	T
MutationAssessor	Benign	0.81	L
PhyloP100		7.9
PrimateAI	Uncertain	0.70	T
PROVEAN	Benign	-0.36	N
REVEL	Uncertain	0.39
Sift	Benign	1.0	T
Sift4G	Benign	0.78	T
Varity_R		0.42
gMVP		0.49
Mutation Taster		=52/48	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs41265123;

hg19: chr2-233348851;

COSMIC: COSV58812016;

COSMIC: COSV58812016;