1-6474583-C-A

Variant names:

• chr1-6474583-C-A
• rs141032388
• NM_020631.6:c.307G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_020631.6(PLEKHG5):​c.307G>T​(p.Val103Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000342 in 1,461,254 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V103M) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: PLEKHG5 NM_020631.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.54
• Publications: 9 publications found

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 Gene-Disease associations (from GenCC):

• neuromuscular disease

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Charcot-Marie-Tooth disease recessive intermediate C

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
• neuronopathy, distal hereditary motor, autosomal recessive 4

  Inheritance: AR Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PLEKHG5	NM_020631.6	c.307G>T	p.Val103Leu	missense_variant	Exon 6 of 21	ENST00000377728.8	NP_065682.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PLEKHG5	ENST00000377728.8	c.307G>T	p.Val103Leu	missense_variant	Exon 6 of 21	2	NM_020631.6	ENSP00000366957.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461254 Hom.: 0 Cov.: 34 AF XY: 0.00000275 AC XY: 2 AN XY: 726958

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44714

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52850

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000360 AC: 4 AN: 1111966

Other (OTH) AF: 0.0000166 AC: 1 AN: 60386

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

Apr 26, 2018

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces valine with leucine at codon 103 of the PLEKHG5 protein (p.Val103Leu). The valine residue is moderately conserved and there is a small physicochemical difference between valine and leucine. 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 do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). 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). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.57
BayesDel_addAF	Uncertain	0.16	D
BayesDel_noAF	Uncertain	-0.010
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.35	.;.;.;.;.;.;.;.;T;T
Eigen	Uncertain	0.63
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.97	D;.;D;D;D;D;.;D;D;D
M_CAP	Uncertain	0.12	D
MetaRNN	Uncertain	0.48	T;T;T;T;T;T;T;T;T;T
MetaSVM	Uncertain	0.069	D
MutationAssessor	Benign	1.9	.;.;.;.;.;.;.;.;L;.
PhyloP100		4.5
PrimateAI	Uncertain	0.60	T
PROVEAN	Benign	-1.4	N;N;N;N;N;N;N;N;N;N
REVEL	Uncertain	0.39
Sift	Uncertain	0.0070	D;D;D;D;D;D;D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;D;D;D;D;D;D;D
Polyphen		1.0	.;.;.;.;D;D;.;.;D;D
Vest4		0.64
MutPred		0.30		.;.;.;.;.;.;.;.;Loss of sheet (P = 0.0228);.;
MVP		0.80
MPC		0.91
ClinPred		0.92	D
GERP RS		4.5
Varity_R		0.32
gMVP		0.56
Mutation Taster		=59/41	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: rs141032388; hg19: chr1-6534643;