7-12214959-A-G

Position:

• chr7-12214959-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001134232.2(TMEM106B):​c.149A>G​(p.Tyr50Cys) variant causes a missense change involving the alteration of a conserved nucleotide. 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: TMEM106B NM_001134232.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.74

Genes affected

TMEM106B (HGNC:22407): (transmembrane protein 106B) Enables ATPase binding activity. Involved in dendrite morphogenesis and lysosome localization. Located in endosome and lysosomal membrane. Implicated in hypomyelinating leukodystrophy. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.872

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TMEM106B	NM_001134232.2	c.149A>G	p.Tyr50Cys	missense_variant	2/8	ENST00000396668.8	NP_001127704.1
TMEM106B	NM_018374.4	c.149A>G	p.Tyr50Cys	missense_variant	3/9		NP_060844.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TMEM106B	ENST00000396668.8	c.149A>G	p.Tyr50Cys	missense_variant	2/8	1	NM_001134232.2	ENSP00000379902	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

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 29, 2022

This variant has not been reported in the literature in individuals affected with TMEM106B-related conditions. 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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt TMEM106B protein function. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces tyrosine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 50 of the TMEM106B protein (p.Tyr50Cys). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Benign	0.081	T;T;T
Eigen	Pathogenic	0.75
Eigen_PC	Pathogenic	0.75
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	.;D;D
M_CAP	Benign	0.022	T
MetaRNN	Pathogenic	0.87	D;D;D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.8	L;.;L
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.84	D
PROVEAN	Uncertain	-4.2	D;D;D
REVEL	Uncertain	0.56
Sift	Benign	0.21	T;T;T
Sift4G	Benign	0.20	T;T;T
Polyphen		1.0	D;.;D
Vest4		0.89
MutPred		0.79		Gain of catalytic residue at P49 (P = 0.0135);Gain of catalytic residue at P49 (P = 0.0135);Gain of catalytic residue at P49 (P = 0.0135);
MVP		0.49
MPC		0.99
ClinPred		0.99	D
GERP RS		5.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.36
gMVP		0.81

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: chr7-12254585; COSMIC: COSV67543425; COSMIC: COSV67543425;