Genetic Variant GINS1:c.-48C>G (chr20-25407773-C-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_021067.5(GINS1):c.-48C>G variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000392 in 1,276,616 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000039 ( 0 hom. )

Consequence

GINS1
NM_021067.5 5_prime_UTR

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter P:1U:1

Conservation

PhyloP100: 0.0590

Variant links:

Genes affected

GINS1 (HGNC:28980): (GINS complex subunit 1) The yeast heterotetrameric GINS complex is made up of Sld5 (GINS4; MIM 610611), Psf1, Psf2 (GINS2; MIM 610609), and Psf3 (GINS3; MIM 610610). The formation of the GINS complex is essential for the initiation of DNA replication in yeast and Xenopus egg extracts (Ueno et al., 2005 [PubMed 16287864]).[supplied by OMIM, Mar 2008]

GINS1 links:

LOC105372581 (HGNC:):

LOC105372581 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GINS1	NM_021067.5 link	c.-48C>G		5_prime_UTR_variant	Exon 1 of 7	ENST00000262460.5	NP_066545.3	Q14691

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GINS1	ENST00000262460 link	c.-48C>G		5_prime_UTR_variant	Exon 1 of 7	1	NM_021067.5	ENSP00000262460.4		Q14691

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000412

AC:

AN:

242728

Hom.:

AF XY:

0.00000759

AC XY:

AN XY:

131752

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000918

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000392

AC:

AN:

1276616

Hom.:

Cov.:

AF XY:

0.00000620

AC XY:

AN XY:

644924

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000529

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Combined immunodeficiency due to GINS1 deficiency

Pathogenic:1

Jan 09, 2018

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

not provided

Uncertain:1

Nov 22, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant occurs in a non-coding region of the GINS1 gene. It does not change the encoded amino acid sequence of the GINS1 protein. RNA analysis indicates that this variant induces altered splicing and is likely to result in the loss of the initiator methionine. This variant is present in population databases (no rsID available, gnomAD 0.0009%). This variant has been observed in individual(s) with GINS1 deficiency (PMID: 28414293). ClinVar contains an entry for this variant (Variation ID: 487510). Studies have shown that this variant results in skipping of exon 1, and is expected to result in the loss of the initiator methionine (PMID: 28414293). 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

BayesDel_noAF

Benign

-0.72

CADD

Benign

DANN

Benign

0.63

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.67

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.67

Position offset: 0

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over