Genetic Variant TMEM175:p.Pro193Arg (chr4-953305-C-G) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_032326.4(TMEM175):c.578C>G(p.Pro193Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,461,628 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P193L) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

TMEM175
NM_032326.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 4.87

Publications

2 publications found

Variant links:

Genes affected

TMEM175 (HGNC:28709): (transmembrane protein 175) Enables potassium ion leak channel activity. Involved in potassium ion transmembrane transport. Located in endosome and lysosome. Is integral component of endosome membrane and integral component of lysosomal membrane. [provided by Alliance of Genome Resources, Apr 2022]

TMEM175 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.9

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_032326.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TMEM175	NM_032326.4	MANE Select	c.578C>G	p.Pro193Arg	missense	Exon 8 of 11	NP_115702.1	Q9BSA9-1
TMEM175	NM_001297423.2		c.332C>G	p.Pro111Arg	missense	Exon 8 of 11	NP_001284352.1	F6UWG6
TMEM175	NM_001297424.2		c.332C>G	p.Pro111Arg	missense	Exon 6 of 9	NP_001284353.1	F6UWG6

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TMEM175	ENST00000264771.9	TSL:1 MANE Select	c.578C>G	p.Pro193Arg	missense	Exon 8 of 11	ENSP00000264771.4	Q9BSA9-1
TMEM175	ENST00000622959.3	TSL:1	c.230C>G	p.Pro77Arg	missense	Exon 9 of 12	ENSP00000485461.1	Q9BSA9-2
TMEM175	ENST00000513952.5	TSL:1	n.*600C>G		non_coding_transcript_exon	Exon 9 of 12	ENSP00000427218.1	D6RCD9

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000399

AC:

AN:

250860

AF XY:

0.00000738

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461628

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727134

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44692

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26114

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.00

AC:

AN:

86246

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53364

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111892

Other (OTH)

AF:

0.00

AC:

AN:

60384

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.0385499), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.90

BayesDel_addAF

Pathogenic

0.26

BayesDel_noAF

Pathogenic

0.14

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.27

Eigen

Uncertain

0.41

Eigen_PC

Uncertain

0.30

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.88

M_CAP

Pathogenic

0.40

MetaRNN

Pathogenic

0.90

MetaSVM

Benign

-0.60

MutationAssessor

Uncertain

2.5

PhyloP100

4.9

PrimateAI

Benign

0.42

PROVEAN

Uncertain

-3.8

REVEL

Uncertain

0.37

Sift

Benign

0.045

Sift4G

Uncertain

0.0040

Polyphen

1.0

Vest4

0.93

MutPred

0.69

Gain of methylation at P193 (P = 0.026)

MVP

0.32

MPC

0.55

ClinPred

0.97

GERP RS

4.9

Varity_R

0.43

gMVP

0.93

Mutation Taster

=23/77

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over