rs1421078132

Variant names:

• chr11-14464921-A-C
• rs1421078132
• NM_001144061.2:c.2400T>G

Your query was ambiguous. Multiple possible variants found:

• chr11-14464921-A-C
• chr11-14464921-A-G

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2 PP2 PP3_Moderate

The NM_001144061.2(COPB1):​c.2400T>G​(p.Phe800Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000342 in 1,460,496 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 (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: COPB1 NM_001144061.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.81
• Publications: 0 publications found

Genes affected

COPB1 (HGNC:2231): (COPI coat complex subunit beta 1) This gene encodes a protein subunit of the coatomer complex associated with non-clathrin coated vesicles. The coatomer complex, also known as the coat protein complex 1, forms in the cytoplasm and is recruited to the Golgi by activated guanosine triphosphatases. Once at the Golgi membrane, the coatomer complex may assist in the movement of protein and lipid components back to the endoplasmic reticulum. Alternatively spliced transcript variants have been described. [provided by RefSeq, Jan 2009]

COPB1 Gene-Disease associations (from GenCC):

• Baralle-Macken syndrome

  Inheritance: AR, Unknown Classification: LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 2 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Gene score misZ: 2.3822 (below the threshold of 3.09). Trascript score misZ: 2.5602 (below the threshold of 3.09). GenCC associations: The gene is linked to Baralle-Macken syndrome.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.916

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COPB1	NM_001144061.2	c.2400T>G	p.Phe800Leu	missense_variant	Exon 18 of 22	ENST00000439561.7	NP_001137533.1
COPB1	NM_001144062.2	c.2400T>G	p.Phe800Leu	missense_variant	Exon 18 of 22		NP_001137534.1
COPB1	NM_016451.5	c.2400T>G	p.Phe800Leu	missense_variant	Exon 18 of 22		NP_057535.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COPB1	ENST00000439561.7	c.2400T>G	p.Phe800Leu	missense_variant	Exon 18 of 22	1	NM_001144061.2	ENSP00000397873.2
COPB1	ENST00000249923.7	c.2400T>G	p.Phe800Leu	missense_variant	Exon 18 of 22	1		ENSP00000249923.3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 250998 AF XY: 0.00

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1460496 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 726464

African (AFR) AF: 0.00 AC: 0 AN: 33442

American (AMR) AF: 0.00 AC: 0 AN: 44668

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26124

East Asian (EAS) AF: 0.00 AC: 0 AN: 39640

South Asian (SAS) AF: 0.00 AC: 0 AN: 86208

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53228

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5428

European-Non Finnish (NFE) AF: 0.00000360 AC: 4 AN: 1111446

Other (OTH) AF: 0.0000166 AC: 1 AN: 60312

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jul 06, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2400T>G (p.F800L) alteration is located in exon 18 (coding exon 17) of the COPB1 gene. This alteration results from a T to G substitution at nucleotide position 2400, causing the phenylalanine (F) at amino acid position 800 to be replaced by a leucine (L). 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	Pathogenic	1.0
BayesDel_addAF	Uncertain	0.13	D
BayesDel_noAF	Pathogenic	0.14
CADD	Uncertain	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.74	D;D
Eigen	Pathogenic	0.68
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.99	.;D
M_CAP	Benign	0.045	D
MetaRNN	Pathogenic	0.92	D;D
MetaSVM	Uncertain	-0.22	T
MutationAssessor	Pathogenic	3.2	M;M
PhyloP100		3.8
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-5.5	D;D
REVEL	Uncertain	0.41
Sift	Uncertain	0.0010	D;D
Sift4G	Uncertain	0.047	D;D
Polyphen		1.0	D;D
Vest4		0.93
MutPred		0.71		Gain of sheet (P = 0.1451);Gain of sheet (P = 0.1451);
MVP		0.79
MPC		0.82
ClinPred		0.99	D
GERP RS		4.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.86
gMVP		0.72
Mutation Taster		=5/95	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs1421078132; hg19: chr11-14486467;