11-110579765-C-T

Variant names:

• chr11-110579765-C-T
• rs748178488
• NM_001384657.1:c.3181G>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.3181G>A​(p.Glu1061Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000328 in 1,614,010 control chromosomes in the GnomAD database, including 1 homozygotes. 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 0.000020 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000034 (1 hom.)
• Consequence: ARHGAP20 NM_001384657.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.26
• Publications: 0 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=0.030417055).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ARHGAP20	NM_001384657.1	c.3181G>A	p.Glu1061Lys	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.3181G>A	p.Glu1061Lys	missense_variant	Exon 15 of 15		NM_001384657.1	ENSP00000507405.1

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152212 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

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: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000637 AC: 16 AN: 251190 AF XY: 0.0000737

Gnomad AFR exome AF: 0.00

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: 0.00000880

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.0000342 AC: 50 AN: 1461680 Hom.: 1 Cov.: 33 AF XY: 0.0000440 AC XY: 32 AN XY: 727168

African (AFR) AF: 0.0000299 AC: 1 AN: 33436

American (AMR) AF: 0.0000448 AC: 2 AN: 44674

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

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

South Asian (SAS) AF: 0.000313 AC: 27 AN: 86246

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53390

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 0.00000989 AC: 11 AN: 1111966

Other (OTH) AF: 0.000149 AC: 9 AN: 60376

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152330 Hom.: 0 Cov.: 33 AF XY: 0.0000269 AC XY: 2 AN XY: 74484

African (AFR) AF: 0.00 AC: 0 AN: 41574

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

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5182

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

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10628

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

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68028

Other (OTH) AF: 0.00 AC: 0 AN: 2114

Alfa AF: 0.0000624 Hom.: 0

Bravo AF: 0.0000227

ExAC AF: 0.0000494 AC: 6

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Aug 10, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.3181G>A (p.E1061K) 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 3181, causing the glutamic acid (E) at amino acid position 1061 to be replaced by a lysine (K). 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	0.068
BayesDel_addAF	Benign	-0.42	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.035	T;T;.;.;.;.
Eigen	Benign	-0.23
Eigen_PC	Benign	-0.19
FATHMM_MKL	Benign	0.29	N
LIST_S2	Uncertain	0.91	D;D;D;.;D;D
M_CAP	Benign	0.0056	T
MetaRNN	Benign	0.030	T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	2.0	M;.;.;.;.;.
PhyloP100		2.3
PrimateAI	Benign	0.37	T
PROVEAN	Benign	-0.73	N;N;N;N;N;N
REVEL	Benign	0.040
Sift	Uncertain	0.0040	D;T;D;D;D;D
Sift4G	Benign	0.13	T;T;T;T;T;T
Polyphen		0.26	B;.;B;.;B;.
Vest4		0.17
MutPred		0.087		Loss of ubiquitination at K1063 (P = 0.0074);.;.;.;.;.;
MVP		0.42
MPC		0.12
ClinPred		0.057	T
GERP RS		3.7
Varity_R		0.24
gMVP		0.18
Mutation Taster		=100/0	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: rs748178488; hg19: chr11-110450489;