NM_201525.4:c.843_844delCGinsGC

Variant names:

• chr16-57655473-CG-GC
• rs1057517931
• NM_201525.4:c.843_844delCGinsGC

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP6

The NM_201525.4(ADGRG1):​c.843_844delCGinsGC​(p.SerGly281ArgArg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency: Genomes: not found (cov: 31)
• Consequence: ADGRG1 NM_201525.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1
• Conservation: PhyloP100: -0.262

Genes affected

ADGRG1 (HGNC:4512): (adhesion G protein-coupled receptor G1) This gene encodes a member of the G protein-coupled receptor family and regulates brain cortical patterning. The encoded protein binds specifically to transglutaminase 2, a component of tissue and tumor stroma implicated as an inhibitor of tumor progression. Mutations in this gene are associated with a brain malformation known as bilateral frontoparietal polymicrogyria. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP6: Variant 16-57655473-CG-GC is Benign according to our data. Variant chr16-57655473-CG-GC is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 372698.We mark this variant Likely_benign, oryginal submissions are: {Benign=1, Uncertain_significance=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ADGRG1	NM_201525.4	c.843_844delCGinsGC	p.SerGly281ArgArg	missense_variant		ENST00000562631.7	NP_958933.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ADGRG1	ENST00000562631.7	c.843_844delCGinsGC	p.SerGly281ArgArg	missense_variant		1	NM_201525.4	ENSP00000455351.2

Frequencies

GnomAD3 genomes Cov.: 31

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 31

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not specified Uncertain:1

Dec 02, 2016

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

A variant of uncertain significance has been identified in the ADGRG1 gene. The c.843_844delCGinsGC variant has not been published as a pathogenic variant, nor has it been reported as a benign variant to our knowledge. The c.843_844delCGinsGC variant is not observed in large population cohorts (Lek et al., 2016; 1000 Genomes Consortium et al., 2015; Exome Variant Server). The c.843_844delCGinsGC variant is caused by two nucleotide substitutions (c.843C>G and c.844 G>C) on the same allele (in cis), resulting in an in-frame deletion of a Serine and Glycine residue and the insertion of two Arginine residues, denoted p.Ser281_Gly282delinsArgArg. However, the c.843_844delCGinsGC variant alters residues that are not conserved. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -

Bilateral frontoparietal polymicrogyria;C3810405:Polymicrogyria, bilateral perisylvian, autosomal recessive Uncertain:1

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided Benign:1

Jan 21, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1057517931; hg19: chr16-57689385;