Genetic Variant ARHGAP40:p.Ala227Val (chr20-38629547-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001164431.3(ARHGAP40):c.680C>T(p.Ala227Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,210 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A227D) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Consequence

ARHGAP40
NM_001164431.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.168

Publications

0 publications found

Variant links:

Genes affected

ARHGAP40 (HGNC:16226): (Rho GTPase activating protein 40) Predicted to enable GTPase activator activity. Predicted to be involved in regulation of actin filament polymerization 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]

ARHGAP40 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.03142968).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001164431.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ARHGAP40	NM_001164431.3	MANE Select	c.680C>T	p.Ala227Val	missense	Exon 5 of 15	NP_001157903.2	Q5TG30

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
ARHGAP40	ENST00000373345.9	TSL:5 MANE Select	c.680C>T	p.Ala227Val	missense	Exon 5 of 15	ENSP00000362442.5	Q5TG30
ARHGAP40	ENST00000243967.8	TSL:5	c.341C>T	p.Ala114Val	missense	Exon 3 of 14	ENSP00000243967.4	H7BXE0
ARHGAP40	ENST00000906550.1		c.558+2332C>T		intron	N/A	ENSP00000576609.1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152210

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152210

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74360

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41462

American (AMR)

AF:

0.0000655

AC:

AN:

15278

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68034

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.072

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.62

CADD

Benign

2.5

(source)

DANN

Benign

0.36

DEOGEN2

Benign

0.0022

Eigen

Benign

-0.75

Eigen_PC

Benign

-0.74

FATHMM_MKL

Benign

0.025

LIST_S2

Benign

0.59

M_CAP

Benign

0.013

MetaRNN

Benign

0.031

MetaSVM

Benign

-0.99

MutationAssessor

Benign

0.26

PhyloP100

0.17

PrimateAI

Benign

0.35

PROVEAN

Benign

0.16

REVEL

Benign

0.014

Sift

Benign

0.65

Sift4G

Benign

0.51

Vest4

0.031

MutPred

0.15

Loss of phosphorylation at S179 (P = 0.3269)

MVP

0.040

ClinPred

0.048

GERP RS

1.7

Varity_R

0.026

gMVP

0.13

Mutation Taster

=94/6

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over