1-15727172-C-G

Variant names:

• chr1-15727172-C-G
• rs774282688
• NM_015164.4:c.1100C>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_015164.4(PLEKHM2):​c.1100C>G​(p.Thr367Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000413 in 1,451,330 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: PLEKHM2 NM_015164.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.461
• Publications: 0 publications found

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]

PLEKHM2 Gene-Disease associations (from GenCC):

• dilated cardiomyopathy

  Inheritance: AR Classification: LIMITED Submitted by: ClinGen, Ambry Genetics

ENSG00000237938 (HGNC:58402):

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.061623603).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PLEKHM2	NM_015164.4	c.1100C>G	p.Thr367Ser	missense_variant	Exon 9 of 20	ENST00000375799.8	NP_055979.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PLEKHM2	ENST00000375799.8	c.1100C>G	p.Thr367Ser	missense_variant	Exon 9 of 20	1	NM_015164.4	ENSP00000364956.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000413 AC: 6 AN: 1451330 Hom.: 0 Cov.: 33 AF XY: 0.00000555 AC XY: 4 AN XY: 720584

African (AFR) AF: 0.00 AC: 0 AN: 33342

American (AMR) AF: 0.00 AC: 0 AN: 43848

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25732

East Asian (EAS) AF: 0.00 AC: 0 AN: 39392

South Asian (SAS) AF: 0.00 AC: 0 AN: 84984

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51642

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5712

European-Non Finnish (NFE) AF: 0.00000542 AC: 6 AN: 1106776

Other (OTH) AF: 0.00 AC: 0 AN: 59902

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Dilated Cardiomyopathy, Recessive Uncertain:1

Aug 31, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces threonine with serine at codon 367 of the PLEKHM2 protein (p.Thr367Ser). The threonine residue is weakly conserved and there is a small physicochemical difference between threonine and serine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals affected with PLEKHM2-related conditions. 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. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. 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	Benign	0.082
BayesDel_addAF	Benign	-0.33	T
BayesDel_noAF	Benign	-0.71
CADD	Benign	3.4
DANN	Benign	0.70
DEOGEN2	Benign	0.010	T;.
Eigen	Benign	-0.82
Eigen_PC	Benign	-0.80
FATHMM_MKL	Benign	0.048	N
LIST_S2	Benign	0.64	T;T
M_CAP	Benign	0.0098	T
MetaRNN	Benign	0.062	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.0	M;.
PhyloP100		0.46
PrimateAI	Benign	0.37	T
PROVEAN	Benign	0.21	N;N
REVEL	Benign	0.059
Sift	Benign	0.075	T;T
Sift4G	Benign	0.92	T;T
Polyphen		0.020	B;.
Vest4		0.041
MutPred		0.13		Gain of helix (P = 0.0164);.;
MVP		0.28
MPC		0.14
ClinPred		0.11	T
GERP RS		4.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.2
Varity_R		0.079
gMVP		0.086
Mutation Taster		=97/3	polymorphism

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

Other links and lift over

dbSNP: rs774282688; hg19: chr1-16053667;