1-160290542-C-A

Variant names:

• chr1-160290542-C-A
• NM_004371.4:c.3565G>T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_004371.4(COPA):​c.3565G>T​(p.Gly1189Trp) variant causes a missense change. 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 Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: COPA NM_004371.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.03

Genes affected

COPA (HGNC:2230): (COPI coat complex subunit alpha) In eukaryotic cells, protein transport between the endoplasmic reticulum and Golgi compartments is mediated in part by non-clathrin-coated vesicular coat proteins (COPs). Seven coat proteins have been identified, and they represent subunits of a complex known as coatomer. The subunits are designated alpha-COP, beta-COP, beta-prime-COP, gamma-COP, delta-COP, epsilon-COP, and zeta-COP. The alpha-COP, encoded by COPA, shares high sequence similarity with RET1P, the alpha subunit of the coatomer complex in yeast. Also, the N-terminal 25 amino acids of alpha-COP encode the bioactive peptide, xenin, which stimulates exocrine pancreatic secretion and may act as a gastrointestinal hormone. Alternative splicing results in multiple splice forms encoding distinct isoforms. [provided by RefSeq, Jul 2008]

LOC107985219 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.891

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COPA	NM_004371.4	c.3565G>T	p.Gly1189Trp	missense_variant	Exon 32 of 33	ENST00000241704.8	NP_004362.2
COPA	NM_001098398.2	c.3592G>T	p.Gly1198Trp	missense_variant	Exon 32 of 33		NP_001091868.1
LOC107985219	XR_001738265.2	n.537-715C>A		intron_variant	Intron 2 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COPA	ENST00000241704.8	c.3565G>T	p.Gly1189Trp	missense_variant	Exon 32 of 33	1	NM_004371.4	ENSP00000241704.7

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Autoimmune interstitial lung disease-arthritis syndrome Uncertain:1

Feb 02, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with tryptophan, which is neutral and slightly polar, at codon 1189 of the COPA protein (p.Gly1189Trp). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with COPA-related conditions. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt COPA protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.79
BayesDel_addAF	Pathogenic	0.33	D
BayesDel_noAF	Pathogenic	0.23
CADD	Pathogenic	31
DANN	Uncertain	1.0
DEOGEN2	Benign	0.41	.;.;T;.;.
Eigen	Pathogenic	0.99
Eigen_PC	Pathogenic	0.95
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.95	D;D;D;D;D
M_CAP	Benign	0.063	D
MetaRNN	Pathogenic	0.89	D;D;D;D;D
MetaSVM	Uncertain	-0.23	T
MutationAssessor	Pathogenic	3.5	.;.;M;.;.
PrimateAI	Pathogenic	0.79	T
PROVEAN	Pathogenic	-5.0	.;D;D;.;.
REVEL	Uncertain	0.51
Sift	Pathogenic	0.0	.;D;D;.;.
Sift4G	Pathogenic	0.0	.;D;D;.;.
Polyphen		1.0	.;D;D;.;.
Vest4		0.93, 0.92
MutPred		0.79		.;.;Loss of glycosylation at S1188 (P = 0.0691);.;.;
MVP		0.84
MPC		1.2
ClinPred		0.99	D
GERP RS		6.0
Varity_R		0.73
gMVP		0.78

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-160260332;