chr18-6873461-C-T

Position:

• chr18-6873461-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001366230.1(ARHGAP28):​c.1007C>T​(p.Ser336Phe) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,712 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: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: ARHGAP28 NM_001366230.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.07

Genes affected

ARHGAP28 (HGNC:25509): (Rho GTPase activating protein 28) Predicted to enable GTPase activator activity. Predicted to be involved in negative regulation of GTP binding activity; regulation of actin filament organization; and regulation of small GTPase mediated signal transduction. Predicted to be located in cytosol. Predicted to be active in cytoplasm. [provided by Alliance of Genome Resources, Apr 2022]

(HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.768

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ARHGAP28	NM_001366230.1	c.1007C>T	p.Ser336Phe	missense_variant	8/18	ENST00000383472.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ARHGAP28	ENST00000383472.9	c.1007C>T	p.Ser336Phe	missense_variant	8/18	5	NM_001366230.1	A2
	ENST00000583659.1	n.482G>A		non_coding_transcript_exon_variant	2/2	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461712 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 727144

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 27, 2022

The c.530C>T (p.S177F) alteration is located in exon 7 (coding exon 6) of the ARHGAP28 gene. This alteration results from a C to T substitution at nucleotide position 530, causing the serine (S) at amino acid position 177 to be replaced by a phenylalanine (F). 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	0.82
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.080
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.46	T;.;.;.;.;.
Eigen	Pathogenic	0.80
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.94	D;D;.;D;D;D
M_CAP	Benign	0.031	D
MetaRNN	Pathogenic	0.77	D;D;D;D;D;D
MetaSVM	Benign	-1.0	T
MutationAssessor	Pathogenic	3.0	M;.;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D
PrimateAI	Uncertain	0.63	T
PROVEAN	Pathogenic	-4.8	.;D;D;D;D;.
REVEL	Uncertain	0.42
Sift	Uncertain	0.0010	.;D;D;D;D;.
Sift4G	Pathogenic	0.0010	D;D;D;D;D;D
Polyphen		1.0	D;D;.;.;.;.
Vest4		0.77
MutPred		0.43		Loss of disorder (P = 0.0146);.;.;.;.;.;
MVP		0.57
MPC		0.71
ClinPred		1.0	D
GERP RS		5.3
Varity_R		0.58
gMVP		0.92

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr18-6873460;