chr20-5100892-G-C

Position:

• chr20-5100892-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001009923.2(TMEM230):​c.451C>G​(p.Leu151Val) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TMEM230 NM_001009923.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.04

Genes affected

TMEM230 (HGNC:15876): (transmembrane protein 230) This gene encodes a multi-pass transmembrane protein that belongs to the TMEM134/TMEM230 protein family. The encoded protein localizes to secretory and recycling vesicle in the neuron and may be involved in synaptic vesicles trafficking and recycling. Mutations in this gene may be linked to familial Parkinson's disease. [provided by RefSeq, Mar 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.807

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TMEM230	NM_001009923.2	c.451C>G	p.Leu151Val	missense_variant	5/5	ENST00000342308.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TMEM230	ENST00000342308.10	c.451C>G	p.Leu151Val	missense_variant	5/5	2	NM_001009923.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 27, 2022

This variant has not been reported in the literature in individuals affected with TMEM230-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces leucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 151 of the TMEM230 protein (p.Leu151Val). 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 disruptive. 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	0.66
BayesDel_addAF	Pathogenic	0.25	D
BayesDel_noAF	Uncertain	0.12
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Benign	0.061	T;T;T;T;T;.;T
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.36
FATHMM_MKL	Uncertain	0.82	D
LIST_S2	Uncertain	0.93	.;.;.;.;.;D;D
M_CAP	Benign	0.026	D
MetaRNN	Pathogenic	0.81	D;D;D;D;D;D;D
MetaSVM	Benign	-0.63	T
MutationAssessor	Uncertain	2.9	M;M;M;M;M;.;M
MutationTaster	Benign	1.0	D;D;D;D;D;D;D
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-2.1	N;N;N;N;N;N;N
REVEL	Uncertain	0.30
Sift	Uncertain	0.0050	D;D;D;D;D;T;D
Sift4G	Benign	0.090	T;T;T;T;T;T;T
Polyphen		1.0	D;D;D;D;D;D;D
Vest4		0.78
MutPred		0.71		Gain of sheet (P = 0.0477);Gain of sheet (P = 0.0477);Gain of sheet (P = 0.0477);Gain of sheet (P = 0.0477);Gain of sheet (P = 0.0477);.;Gain of sheet (P = 0.0477);
MVP		0.63
MPC		1.3
ClinPred		0.97	D
GERP RS		2.9
Varity_R		0.29
gMVP		0.93

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr20-5081538;