rs147966742

Positions:

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBS1_Supporting

The NM_016464.5(TMEM138):c.461G>A(p.Arg154His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000109 in 1,613,926 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00058 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000060 ( 1 hom. )

Consequence

TMEM138
NM_016464.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.36

Variant links:

Genes affected

TMEM138 (HGNC:26944): (transmembrane protein 138) This gene encodes a multi-pass transmembrane protein. Reduced expression of this gene in mouse fibroblasts causes short cilia and failure of ciliogenesis. Expression of this gene is tightly coordinated with expression of the neighboring gene TMEM216. Mutations in this gene are associated with the autosomal recessive neurodevelopmental disorder Joubert Syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2012]

TMEM138 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.031042129).

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000578 (88/152308) while in subpopulation AFR AF= 0.00202 (84/41566). AF 95% confidence interval is 0.00167. There are 0 homozygotes in gnomad4. There are 51 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TMEM138	NM_016464.5 linkuse as main transcript	c.461G>A	p.Arg154His	missense_variant	5/5	ENST00000278826.11	NP_057548.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TMEM138	ENST00000278826.11 linkuse as main transcript	c.461G>A	p.Arg154His	missense_variant	5/5	1	NM_016464.5	ENSP00000278826	P1	Q9NPI0-1

Frequencies

GnomAD3 genomes

AF:

0.000572

AC:

AN:

152192

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00200

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000147

AC:

AN:

251228

Hom.:

AF XY:

0.000125

AC XY:

AN XY:

135804

show subpopulations

Gnomad AFR exome

AF:

0.00160

Gnomad AMR exome

AF:

0.000231

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000602

AC:

AN:

1461618

Hom.:

Cov.:

AF XY:

0.0000481

AC XY:

AN XY:

727134

show subpopulations

Gnomad4 AFR exome

AF:

0.00137

Gnomad4 AMR exome

AF:

0.000313

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000812

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.000282

GnomAD4 genome

AF:

0.000578

AC:

AN:

152308

Hom.:

Cov.:

AF XY:

0.000685

AC XY:

AN XY:

74476

show subpopulations

Gnomad4 AFR

AF:

0.00202

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000123

Hom.:

Bravo

AF:

0.000563

ESP6500AA

AF:

0.00113

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000206

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Joubert syndrome 16

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 27, 2023

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 154 of the TMEM138 protein (p.Arg154His). This variant is present in population databases (rs147966742, gnomAD 0.2%). This variant has not been reported in the literature in individuals affected with TMEM138-related conditions. ClinVar contains an entry for this variant (Variation ID: 570566). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. 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

0.12

BayesDel_addAF

Benign

-0.092

BayesDel_noAF

Uncertain

0.090

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.78

D;.

Eigen

Uncertain

0.67

Eigen_PC

Pathogenic

0.72

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.90

D;D

M_CAP

Benign

0.071

MetaRNN

Benign

0.031

T;T

MetaSVM

Uncertain

0.51

MutationAssessor

Uncertain

2.6

M;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Benign

0.38

PROVEAN

Uncertain

-2.7

D;D

REVEL

Uncertain

0.63

Sift

Uncertain

0.010

D;D

Sift4G

Uncertain

0.0090

D;D

Polyphen

0.90

P;.

Vest4

0.36

MVP

0.74

MPC

0.76

ClinPred

0.078

GERP RS

6.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.28

gMVP

0.69

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over