chr1-15732622-A-T

Position:

• chr1-15732622-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_015164.4(PLEKHM2):​c.2816A>T​(p.Gln939Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: PLEKHM2 NM_015164.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.02

Genes affected

PLEKHM2 (HGNC:29131): (pleckstrin homology and RUN domain containing M2) This gene encodes a protein that binds the plus-end directed microtubule motor protein kinesin, together with the lysosomal GTPase Arl8, and is required for lysosomes to distribute away from the microtubule-organizing center. The encoded protein belongs to the multisubunit BLOC-one-related complex that regulates lysosome positioning. It binds a Salmonella effector protein called Salmonella induced filament A and is a critical host determinant in Salmonella pathogenesis. It has a domain architecture consisting of an N-terminal RPIP8, UNC-14, and NESCA (RUN) domain that binds kinesin-1 as well as the lysosomal GTPase Arl8, and a C-terminal pleckstrin homology domain that binds the Salmonella induced filament A effector protein. Naturally occurring mutations in this gene lead to abnormal localization of lysosomes, impaired autophagy flux and are associated with recessive dilated cardiomyopathy and left ventricular noncompaction. [provided by RefSeq, Feb 2017]

(HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.16299659).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PLEKHM2	NM_015164.4	c.2816A>T	p.Gln939Leu	missense_variant	19/20	ENST00000375799.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PLEKHM2	ENST00000375799.8	c.2816A>T	p.Gln939Leu	missense_variant	19/20	1	NM_015164.4	P2
	ENST00000453804.1	n.37-61T>A		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Dilated Cardiomyopathy, Recessive Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Feb 13, 2017

This sequence change replaces glutamine with leucine at codon 939 of the PLEKHM2 protein (p.Gln939Leu). The glutamine residue is moderately conserved and there is a moderate physicochemical difference between glutamine and leucine. This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a PLEKHM2-related disease. 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. In summary, this variant is a novel missense change that is not predicted to affect protein function. There is no indication that it causes disease, but the available evidence is currently insufficient to prove that conclusively. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Uncertain	0.019	T
BayesDel_noAF	Benign	-0.21
CADD	Benign	19
DANN	Uncertain	0.99
DEOGEN2	Benign	0.038	T;.;.
Eigen	Benign	-0.24
Eigen_PC	Benign	-0.10
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.68	T;T;T
M_CAP	Benign	0.016	T
MetaRNN	Benign	0.16	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.1	M;.;.
MutationTaster	Benign	0.94	D;D
PrimateAI	Benign	0.30	T
PROVEAN	Benign	-2.3	N;N;.
REVEL	Benign	0.17
Sift	Uncertain	0.010	D;D;.
Sift4G	Uncertain	0.011	D;D;.
Polyphen		0.24	B;.;.
Vest4		0.66
MutPred		0.26		Gain of sheet (P = 0.039);.;.;
MVP		0.35
MPC		0.19
ClinPred		0.69	D
GERP RS		3.0
Varity_R		0.15
gMVP		0.58

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs1170562546; hg19: chr1-16059117;