1-6474478-A-G

Position:

• chr1-6474478-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_020631.6(PLEKHG5):​c.412T>C​(p.Phe138Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. F138F) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PLEKHG5 NM_020631.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.69

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]

PLEKHG5 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.28674424).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PLEKHG5	NM_020631.6	c.412T>C	p.Phe138Leu	missense_variant	6/21	ENST00000377728.8	NP_065682.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PLEKHG5	ENST00000377728.8	c.412T>C	p.Phe138Leu	missense_variant	6/21	2	NM_020631.6	ENSP00000366957.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

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

Labcorp Genetics (formerly Invitae), Labcorp

Jul 15, 2017

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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with PLEKHG5-related disease. This variant is not present in population databases (ExAC no frequency). This sequence change replaces phenylalanine with leucine at codon 138 of the PLEKHG5 protein (p.Phe138Leu). The phenylalanine residue is moderately conserved and there is a small physicochemical difference between phenylalanine and leucine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.89
BayesDel_addAF	Benign	-0.0069	T
BayesDel_noAF	Benign	-0.25
CADD	Benign	21
DANN	Benign	0.97
DEOGEN2	Benign	0.089	.;.;.;.;.;.;.;.;T;T
Eigen	Benign	-0.30
Eigen_PC	Benign	-0.13
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.85	T;.;D;T;T;D;.;T;T;D
M_CAP	Benign	0.072	D
MetaRNN	Benign	0.29	T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.96	T
MutationAssessor	Benign	1.3	.;.;.;.;.;.;.;.;L;.
PrimateAI	Uncertain	0.74	T
PROVEAN	Benign	-1.7	N;N;N;N;N;N;N;N;N;N
REVEL	Benign	0.22
Sift	Benign	0.48	T;T;T;T;T;T;T;T;T;T
Sift4G	Benign	0.18	T;T;T;T;T;T;T;T;T;T
Polyphen		0.031, 0.018, 0.0080	.;.;.;.;B;B;.;.;B;B
Vest4		0.63
MutPred		0.34		.;.;.;.;.;.;.;.;Loss of sheet (P = 0.0357);.;
MVP		0.66
MPC		0.31
ClinPred		0.77	D
GERP RS		4.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.22
gMVP		0.31

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

Other links and lift over

dbSNP: rs1302453044; hg19: chr1-6534538;