Genetic Variant PLEKHG2:p.Gly20Cys (chr19-39414144-G-T) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_022835.3(PLEKHG2):c.58G>T(p.Gly20Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000683 in 1,551,564 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000071 ( 3 hom. )

Consequence

PLEKHG2
NM_022835.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.581

Variant links:

Genes affected

PLEKHG2 (HGNC:29515): (pleckstrin homology and RhoGEF domain containing G2) The protein encoded by this gene is a RhoGTPase that can activate CDC42 by promoting exchange of GDP for GTP on CDC42. The encoded protein is activated by binding to the beta and gamma subunits of heterotrimeric guanine nucleotide-binding protein. Defects in this gene have been associated with leukodystrophy and acquired microcephaly with or without dystonia. [provided by RefSeq, May 2017]

PLEKHG2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.039025098).

BS2

High Homozygotes in GnomAdExome4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PLEKHG2	NM_022835.3 link	c.58G>T	p.Gly20Cys	missense_variant	Exon 2 of 19	ENST00000425673.6	NP_073746.2	Q9H7P9-1
PLEKHG2	NM_001351693.2 link	c.58G>T	p.Gly20Cys	missense_variant	Exon 2 of 20		NP_001338622.1
PLEKHG2	NM_001351694.2 link	c.58G>T	p.Gly20Cys	missense_variant	Exon 2 of 18		NP_001338623.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PLEKHG2	ENST00000425673.6 link	c.58G>T	p.Gly20Cys	missense_variant	Exon 2 of 19	2	NM_022835.3	ENSP00000392906.2		Q9H7P9-1

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152266

Hom.:

Cov.:

show subpopulations

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:

0.00124

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000167

AC:

AN:

155974

Hom.:

AF XY:

0.000230

AC XY:

AN XY:

82694

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00114

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000715

AC:

100

AN:

1399180

Hom.:

Cov.:

AF XY:

0.000106

AC XY:

AN XY:

690122

show subpopulations

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:

0.00122

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000185

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152384

Hom.:

Cov.:

AF XY:

0.0000805

AC XY:

AN XY:

74530

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00124

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000688

Hom.:

Bravo

AF:

0.0000227

ExAC

AF:

0.000230

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 16, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.58G>T (p.G20C) alteration is located in exon 2 (coding exon 1) of the PLEKHG2 gene. This alteration results from a G to T substitution at nucleotide position 58, causing the glycine (G) at amino acid position 20 to be replaced by a cysteine (C). 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

0.12

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.28

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.0036

T;.;.;.;.;.

Eigen

Benign

-0.33

Eigen_PC

Benign

-0.42

FATHMM_MKL

Benign

0.055

LIST_S2

Benign

0.82

T;T;T;T;T;T

M_CAP

Uncertain

0.19

MetaRNN

Benign

0.039

T;T;T;T;T;T

MetaSVM

Benign

-0.84

MutationAssessor

Benign

1.6

L;.;.;.;L;.

PrimateAI

Uncertain

0.53

PROVEAN

Benign

-2.2

N;.;D;N;N;N

REVEL

Benign

0.15

Sift

Pathogenic

0.0

D;.;D;D;D;D

Sift4G

Uncertain

0.0050

D;D;T;D;D;D

Polyphen

1.0

D;.;B;.;D;.

Vest4

0.32

MutPred

0.16

Loss of sheet (P = 0.0181);Loss of sheet (P = 0.0181);Loss of sheet (P = 0.0181);Loss of sheet (P = 0.0181);Loss of sheet (P = 0.0181);Loss of sheet (P = 0.0181);

MVP

0.60

ClinPred

0.24

GERP RS

-1.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.26

gMVP

0.41

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over