6-129621672-T-C

Position:

• chr6-129621672-T-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_033515.3(ARHGAP18):​c.787-2820A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.23 in 152,152 control chromosomes in the GnomAD database, including 4,436 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.23 (4436 hom., cov: 32)
• Consequence: ARHGAP18 NM_033515.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.174

Genes affected

ARHGAP18 (HGNC:21035): (Rho GTPase activating protein 18) Enables GTPase activator activity. Involved in several processes, including regulation of actin filament polymerization; regulation of small GTPase mediated signal transduction; and small GTPase mediated signal transduction. Located in cytosol; nuclear speck; and plasma membrane. Part of cytoplasmic microtubule and ruffle. Implicated in schizophrenia. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.278 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ARHGAP18	NM_033515.3	c.787-2820A>G		intron_variant		ENST00000368149.3	NP_277050.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ARHGAP18	ENST00000368149.3	c.787-2820A>G		intron_variant		1	NM_033515.3	ENSP00000357131	P1

Frequencies

GnomAD3 genomes AF: 0.230 AC: 34923 AN: 152034 Hom.: 4432 Cov.: 32

Gnomad AFR AF: 0.130

Gnomad AMI AF: 0.243

Gnomad AMR AF: 0.231

Gnomad ASJ AF: 0.240

Gnomad EAS AF: 0.157

Gnomad SAS AF: 0.215

Gnomad FIN AF: 0.322

Gnomad MID AF: 0.278

Gnomad NFE AF: 0.281

Gnomad OTH AF: 0.250

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

GnomAD4 genome AF: 0.230 AC: 34942 AN: 152152 Hom.: 4436 Cov.: 32 AF XY: 0.231 AC XY: 17163 AN XY: 74388

Gnomad4 AFR AF: 0.130

Gnomad4 AMR AF: 0.231

Gnomad4 ASJ AF: 0.240

Gnomad4 EAS AF: 0.157

Gnomad4 SAS AF: 0.215

Gnomad4 FIN AF: 0.322

Gnomad4 NFE AF: 0.281

Gnomad4 OTH AF: 0.251

Alfa AF: 0.268 Hom.: 7423

Bravo AF: 0.215

Asia WGS AF: 0.203 AC: 703 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	5.1
DANN	Benign	0.42

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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: rs9375638; hg19: chr6-129942817; COSMIC: COSV63763773;