NM_004371.4:c.607-8_607-7delTT

Variant names:

• chr1-160323536-GAA-G
• rs1553206195
• NM_004371.4:c.607-8_607-7delTT

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP6_Moderate

The NM_004371.4(COPA):​c.607-8_607-7delTT variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000138 in 1,450,976 control chromosomes in the GnomAD database, with no homozygous occurrence. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: COPA NM_004371.4 splice_region, intron
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 1.27
• Publications: 0 publications found

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]

COPA Gene-Disease associations (from GenCC):

• autoimmune interstitial lung disease-arthritis syndrome

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP6: Variant 1-160323536-GAA-G is Benign according to our data. Variant chr1-160323536-GAA-G is described in ClinVar as Likely_benign. ClinVar VariationId is 476029.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004371.4. 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
	COPA	NM_004371.4	MANE Select	c.607-8_607-7delTT		splice_region intron	N/A	NP_004362.2
	COPA	NM_001098398.2		c.607-8_607-7delTT		splice_region intron	N/A	NP_001091868.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COPA	ENST00000241704.8	TSL:1 MANE Select	c.607-8_607-7delTT		splice_region intron	N/A	ENSP00000241704.7
	COPA	ENST00000368069.7	TSL:1	c.607-8_607-7delTT		splice_region intron	N/A	ENSP00000357048.3
	COPA	ENST00000647683.1		c.607-8_607-7delTT		splice_region intron	N/A	ENSP00000497495.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000138 AC: 2 AN: 1450976 Hom.: 0 AF XY: 0.00000277 AC XY: 2 AN XY: 721764

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33130

American (AMR) AF: 0.00 AC: 0 AN: 43742

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25890

East Asian (EAS) AF: 0.00 AC: 0 AN: 39302

South Asian (SAS) AF: 0.00 AC: 0 AN: 84656

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53062

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5712

European-Non Finnish (NFE) AF: 0.00000181 AC: 2 AN: 1105576

Other (OTH) AF: 0.00 AC: 0 AN: 59906

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.0296732), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Autoimmune interstitial lung disease-arthritis syndrome Benign:1

Jul 28, 2017

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.18		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: rs1553206195; hg19: chr1-160293326;