dbSNP rs768366778: TMEM138:p.Ser8Arg (chr11-61364414-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_016464.5(TMEM138):c.24C>G(p.Ser8Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,838 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. Synonymous variant affecting the same amino acid position (i.e. S8S) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

TMEM138
NM_016464.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.03

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

Joubert syndrome 16
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
ciliopathy
Inheritance: AR Classification: MODERATE Submitted by: ClinGen
Joubert syndrome with oculorenal defect
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

TMEM138 links:

Genome browser will be placed here

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, 0.91

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TMEM138	NM_016464.5 link	c.24C>G	p.Ser8Arg	missense_variant	Exon 2 of 5	ENST00000278826.11	NP_057548.1	Q9NPI0-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TMEM138	ENST00000278826.11 link	c.24C>G	p.Ser8Arg	missense_variant	Exon 2 of 5	1	NM_016464.5	ENSP00000278826.5		Q9NPI0-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461838

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727222

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33476

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111974

Other (OTH)

AF:

0.00

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.53

BayesDel_addAF

Pathogenic

0.37

BayesDel_noAF

Pathogenic

0.29

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.023

T;.

Eigen

Uncertain

0.38

Eigen_PC

Uncertain

0.40

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.87

D;D

M_CAP

Uncertain

0.13

MetaRNN

Pathogenic

0.91

D;D

MetaSVM

Uncertain

0.20

MutationAssessor

Benign

2.0

M;M

PhyloP100

1.0

PrimateAI

Uncertain

0.77

PROVEAN

Benign

-1.1

N;N

REVEL

Uncertain

0.61

Sift

Benign

0.32

T;T

Sift4G

Benign

0.34

T;T

Polyphen

1.0

D;D

Vest4

0.87

MutPred

0.79

Gain of solvent accessibility (P = 0.0171);Gain of solvent accessibility (P = 0.0171);

MVP

0.96

MPC

1.3

ClinPred

0.87

GERP RS

5.2

Varity_R

0.15

gMVP

0.89

Mutation Taster

=35/65

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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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rs768366778

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over