rs199551649

Variant names:

• chr11-110579948-C-T
• rs199551649
• NM_001384657.1:c.2998G>A

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_001384657.1(ARHGAP20):​c.2998G>A​(p.Gly1000Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000307 in 1,614,208 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00016 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00032 (0 hom.)
• Consequence: ARHGAP20 NM_001384657.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.308
• Publications: 4 publications found

Genes affected

ARHGAP20 (HGNC:18357): (Rho GTPase activating protein 20) The protein encoded by this gene is an activator of RHO-type GTPases, transducing a signal from RAP1 to RHO and impacting neurite outgrowth. [provided by RefSeq, Sep 2016]

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.022230476).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ARHGAP20	NM_001384657.1	c.2998G>A	p.Gly1000Arg	missense_variant	Exon 15 of 15	ENST00000683387.1	NP_001371586.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ARHGAP20	ENST00000683387.1	c.2998G>A	p.Gly1000Arg	missense_variant	Exon 15 of 15		NM_001384657.1	ENSP00000507405.1

Frequencies

GnomAD3 genomes AF: 0.000164 AC: 25 AN: 152216 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000169

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000414

Gnomad FIN AF: 0.0000941

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000220

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.000311 AC: 78 AN: 251196 AF XY: 0.000309

Gnomad AFR exome AF: 0.000185

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000599

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000322 AC: 471 AN: 1461874 Hom.: 0 Cov.: 33 AF XY: 0.000292 AC XY: 212 AN XY: 727238

African (AFR) AF: 0.000149 AC: 5 AN: 33480

American (AMR) AF: 0.0000224 AC: 1 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.000336 AC: 29 AN: 86256

European-Finnish (FIN) AF: 0.0000187 AC: 1 AN: 53418

Middle Eastern (MID) AF: 0.00139 AC: 8 AN: 5764

European-Non Finnish (NFE) AF: 0.000369 AC: 410 AN: 1112008

Other (OTH) AF: 0.000281 AC: 17 AN: 60394

GnomAD4 genome AF: 0.000164 AC: 25 AN: 152334 Hom.: 0 Cov.: 32 AF XY: 0.000121 AC XY: 9 AN XY: 74486

African (AFR) AF: 0.000168 AC: 7 AN: 41570

American (AMR) AF: 0.00 AC: 0 AN: 15304

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5186

South Asian (SAS) AF: 0.000415 AC: 2 AN: 4824

European-Finnish (FIN) AF: 0.0000941 AC: 1 AN: 10624

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000220 AC: 15 AN: 68034

Other (OTH) AF: 0.00 AC: 0 AN: 2116

Alfa AF: 0.000307 Hom.: 0

Bravo AF: 0.000208

TwinsUK AF: 0.000809 AC: 3

ALSPAC AF: 0.00 AC: 0

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000349 AC: 3

ExAC AF: 0.000478 AC: 58

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.000273

EpiControl AF: 0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Apr 02, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2998G>A (p.G1000R) alteration is located in exon 16 (coding exon 15) of the ARHGAP20 gene. This alteration results from a G to A substitution at nucleotide position 2998, causing the glycine (G) at amino acid position 1000 to be replaced by an arginine (R). 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	Benign	0.11
BayesDel_addAF	Benign	-0.48	T
BayesDel_noAF	Benign	-0.56
CADD	Benign	14
DANN	Benign	0.96
DEOGEN2	Benign	0.046	T;T;.;.;.;.
Eigen	Benign	-0.33
Eigen_PC	Benign	-0.47
FATHMM_MKL	Benign	0.066	N
LIST_S2	Benign	0.86	D;D;D;.;D;D
M_CAP	Benign	0.0066	T
MetaRNN	Benign	0.022	T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.0	M;.;.;.;.;.
PhyloP100		-0.31
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-0.80	N;N;N;N;N;N
REVEL	Benign	0.046
Sift	Uncertain	0.0020	D;D;D;D;D;D
Sift4G	Uncertain	0.0030	D;D;D;D;D;D
Polyphen		0.85	P;.;P;.;P;.
Vest4		0.052
MutPred		0.28		Gain of solvent accessibility (P = 6e-04);.;.;.;.;.;
MVP		0.43
MPC		0.13
ClinPred		0.036	T
GERP RS		3.0
Varity_R		0.13
gMVP		0.19
Mutation Taster		=90/10	polymorphism

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

Other links and lift over

dbSNP: rs199551649; hg19: chr11-110450672; COSMIC: COSV99505682;