2-39704107-A-C

Position:

• chr2-39704107-A-C

Variant summary

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

The NM_152390.3(TMEM178A):​c.427A>C​(p.Lys143Gln) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: TMEM178A NM_152390.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.28

Genes affected

TMEM178A (HGNC:28517): (transmembrane protein 178A) Predicted to be involved in negative regulation of osteoclast differentiation and regulation of cytosolic calcium ion concentration. Predicted to be integral component of membrane. Predicted to be active in endoplasmic reticulum membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TMEM178A	NM_152390.3	c.427A>C	p.Lys143Gln	missense_variant	2/4	ENST00000281961.3	NP_689603.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TMEM178A	ENST00000281961.3	c.427A>C	p.Lys143Gln	missense_variant	2/4	1	NM_152390.3	ENSP00000281961	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 22, 2023

The c.427A>C (p.K143Q) alteration is located in exon 2 (coding exon 2) of the TMEM178A gene. This alteration results from a A to C substitution at nucleotide position 427, causing the lysine (K) at amino acid position 143 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.88
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.020
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.062	T
Eigen	Uncertain	0.50
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.92	D
M_CAP	Benign	0.043	D
MetaRNN	Uncertain	0.63	D
MetaSVM	Benign	-0.45	T
MutationAssessor	Uncertain	2.4	M
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.81	D
PROVEAN	Benign	-1.7	N
REVEL	Uncertain	0.36
Sift	Uncertain	0.0070	D
Sift4G	Uncertain	0.020	D
Polyphen		1.0	D
Vest4		0.65
MutPred		0.57		Loss of methylation at K143 (P = 0.0299);
MVP		0.082
MPC		2.0
ClinPred		0.95	D
GERP RS		5.8
Varity_R		0.42
gMVP		0.83

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: chr2-39931247;