1-19219321-C-G

Variant names:

• chr1-19219321-C-G
• rs764704020
• NM_015047.3:c.2964G>C

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 0P and 19B. BP4_Moderate BP6_Very_Strong BP7 BS1 BS2

The NM_015047.3(EMC1):​c.2964G>C​(p.Leu988Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000212 in 1,461,872 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000021 (3 hom.)
• Consequence: EMC1 NM_015047.3 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 0.391

Genes affected

EMC1 (HGNC:28957): (ER membrane protein complex subunit 1) This gene encodes a single-pass type I transmembrane protein, which is a subunit of the endoplasmic reticulum membrane protein complex (EMC). Multiple alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2012]

EMC1-AS1 (HGNC:54050): (EMC1 antisense RNA 1)

ACMG classification

Our verdict: Benign. The variant received -19 ACMG points.

• BP4: Computational evidence support a benign effect (REVEL=0.079).
• BP6: Variant 1-19219321-C-G is Benign according to our data. Variant chr1-19219321-C-G is described in ClinVar as [Likely_benign]. Clinvar id is 2504057.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=0.391 with no splicing effect.
• BS1: Variant frequency is greater than expected in population mid. GnomAdExome4 allele frequency = 0.0000212 (31/1461872) while in subpopulation MID AF = 0.00538 (31/5762). AF 95% confidence interval is 0.00389. There are 3 homozygotes in GnomAdExome4. There are 14 alleles in the male GnomAdExome4 subpopulation. Median coverage is 31. This position FAILED quality control check.
• BS2: High Homozygotes in GnomAdExome4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EMC1	NM_015047.3	c.2964G>C	p.Leu988Leu	synonymous_variant	Exon 23 of 23	ENST00000477853.6	NP_055862.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
EMC1	ENST00000477853.6	c.2964G>C	p.Leu988Leu	synonymous_variant	Exon 23 of 23	1	NM_015047.3	ENSP00000420608.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.0000212 AC: 31 AN: 1461872 Hom.: 3 Cov.: 31 AF XY: 0.0000193 AC XY: 14 AN XY: 727236

Gnomad4 AFR exome AF: 0.00 AC: 0 AN: 33480

Gnomad4 AMR exome AF: 0.00 AC: 0 AN: 44724

Gnomad4 ASJ exome AF: 0.00 AC: 0 AN: 26136

Gnomad4 EAS exome AF: 0.00 AC: 0 AN: 39700

Gnomad4 SAS exome AF: 0.00 AC: 0 AN: 86252

Gnomad4 FIN exome AF: 0.00 AC: 0 AN: 53418

Gnomad4 NFE exome AF: 0.00 AC: 0 AN: 1112004

Gnomad4 Remaining exome AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:1

Apr 06, 2023

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: KIAA0090 c.2964G>C alters a non-conserved nucleotide resulting in a synonymous change. 4/4 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant was absent in 251452 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. To our knowledge, no occurrence of c.2964G>C in individuals affected with Cerebellar Atrophy, Visual Impairment, And Psychomotor Retardation and no experimental evidence demonstrating its impact on protein function have been reported. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as likely benign. -

not provided Benign:1

Jan 22, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.51
CADD	Benign	8.7
DANN	Benign	0.74
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs764704020; hg19: chr1-19545815;