rs769529781

chr1-6474475-C-Gchr1-6474475-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_020631.6(PLEKHG5):c.415G>C(p.Gly139Arg) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,604 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 (★). Another nucleotide change resulting in same amino acid change has been previously reported as Uncertain significancein ClinVar. Synonymous variant affecting the same amino acid position (i.e. G139G) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: PLEKHG5 NM_020631.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.57

Genes affected

PLEKHG5 (HGNC:29105): (pleckstrin homology and RhoGEF domain containing G5) This gene encodes a protein that activates the nuclear factor kappa B (NFKB1) signaling pathway. Mutations in this gene are associated with autosomal recessive distal spinal muscular atrophy. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2012]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.897

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PLEKHG5	NM_020631.6	c.415G>C	p.Gly139Arg	missense_variant	6/21	ENST00000377728.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PLEKHG5	ENST00000377728.8	c.415G>C	p.Gly139Arg	missense_variant	6/21	2	NM_020631.6	P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461604 Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1 AN XY: 727110

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.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Neuronopathy, distal hereditary motor, autosomal recessive 4;C3809309:Charcot-Marie-Tooth disease recessive intermediate C Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Feb 10, 2020

This variant has not been reported in the literature in individuals with PLEKHG5-related conditions. ClinVar contains an entry for this variant (Variation ID: 578542). This variant is not present in population databases (ExAC no frequency). This sequence change replaces glycine with arginine at codon 139 of the PLEKHG5 protein (p.Gly139Arg). The glycine residue is moderately conserved and there is a moderate physicochemical difference between glycine and arginine. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.95
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
Cadd	Uncertain	24
Dann	Pathogenic	1.0
Eigen	Uncertain	0.60
Eigen_PC	Uncertain	0.55
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D;.;D;D;D;D;.;D;D;D
M_CAP	Pathogenic	0.43	D
MetaRNN	Pathogenic	0.90	D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.75	D
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D;D;D;D;D;D
PrimateAI	Uncertain	0.77	T
PROVEAN	Pathogenic	-4.5	D;D;D;D;D;D;D;D;D;D
REVEL	Pathogenic	0.85
Sift	Uncertain	0.0010	D;D;D;D;D;D;D;D;D;D
Sift4G	Uncertain	0.0070	D;D;D;D;D;D;D;D;D;D
Polyphen		1.0	.;.;.;.;D;D;.;.;D;D
Vest4		0.89
MutPred		0.65		.;.;.;.;.;.;.;.;Gain of methylation at G195 (P = 0.0139);.;
MVP		0.89
MPC		0.96
ClinPred		0.99	D
GERP RS		4.3
Varity_R		0.61
gMVP		0.78

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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

Other links and lift over

dbSNP: rs769529781; hg19: chr1-6534535;