11-61392632-A-G

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PVS1_SupportingPM2

The NM_001173990.3(TMEM216):c.1A>G(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000291 in 1,375,952 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000029 ( 0 hom. )

Consequence

TMEM216
NM_001173990.3 start_lost

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:2

Conservation

PhyloP100: 0.427

Publications

0 publications found

Variant links:

Genes affected

TMEM216 (HGNC:25018): (transmembrane protein 216) This locus encodes a transmembrane domain-containing protein. Mutations at this locus have been associated with Meckel-Gruber Syndrome Type 2, and Joubert Syndrome 2, also known as Cerebello-oculorenal Syndrome 2. [provided by RefSeq, Aug 2010]

TMEM216 Gene-Disease associations (from GenCC):

Joubert syndrome 2
Inheritance: AR Classification: STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
Joubert syndrome with oculorenal defect
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Meckel syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
orofaciodigital syndrome type 6
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

TMEM216 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PVS1

Start lost variant, no pathogenic variants between lost start and next in-frame start position. Next in-frame start position is after 8 codons. Genomic position: 61392653. Lost 0.050 part of the original CDS.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TMEM216	NM_001173990.3 link	c.1A>G	p.Met1?	start_lost	Exon 1 of 5	ENST00000515837.7	NP_001167461.1	Q9P0N5-1
TMEM216	NM_001173991.3 link	c.1A>G	p.Met1?	start_lost	Exon 1 of 5		NP_001167462.1	Q9P0N5-3
TMEM216	NM_016499.6 link	c.-197A>G		5_prime_UTR_variant	Exon 1 of 5		NP_057583.2	Q9P0N5-2
TMEM216	NM_001330285.2 link	c.-197A>G		5_prime_UTR_variant	Exon 1 of 5		NP_001317214.1	Q9P0N5J3QT25

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TMEM216	ENST00000515837.7 link	c.1A>G	p.Met1?	start_lost	Exon 1 of 5	2	NM_001173990.3	ENSP00000440638.1		Q9P0N5-1
TMEM216	ENST00000334888.10 link	c.1A>G	p.Met1?	start_lost	Exon 1 of 5	2		ENSP00000334844.5		Q9P0N5-3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000743

AC:

AN:

134534

AF XY:

0.0000137

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000291

AC:

AN:

1375952

Hom.:

Cov.:

AF XY:

0.00000294

AC XY:

AN XY:

679320

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31390

American (AMR)

AF:

0.00

AC:

AN:

35538

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24858

East Asian (EAS)

AF:

0.00

AC:

AN:

35138

South Asian (SAS)

AF:

0.0000505

AC:

AN:

79134

European-Finnish (FIN)

AF:

0.00

AC:

AN:

32950

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5542

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1074038

Other (OTH)

AF:

0.00

AC:

AN:

57364

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Joubert syndrome 2;C1864148:Meckel syndrome, type 2

Uncertain:1

Mar 27, 2018

Counsyl

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

Joubert syndrome

Uncertain:1

Aug 27, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change affects the initiator methionine of the TMEM216 mRNA. The next in-frame methionine is located at codon 8. This variant is present in population databases (no rsID available, gnomAD 0.004%). This variant has not been reported in the literature in individuals affected with TMEM216-related conditions. ClinVar contains an entry for this variant (Variation ID: 557517). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. 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

BayesDel_addAF

Benign

-0.024

BayesDel_noAF

Benign

-0.14

CADD

Benign

(source)

DANN

Benign

0.93

DEOGEN2

Benign

0.012

T;.

Eigen

Benign

-0.35

Eigen_PC

Benign

-0.46

FATHMM_MKL

Benign

0.12

LIST_S2

Uncertain

0.90

D;D

M_CAP

Uncertain

0.089

MetaRNN

Uncertain

0.63

D;D

MetaSVM

Uncertain

-0.27

PhyloP100

0.43

PROVEAN

Benign

-0.36

N;N

REVEL

Benign

0.19

Sift

Benign

0.078

T;T

Sift4G

Benign

0.58

T;T

Vest4

0.19

MutPred

0.89

Gain of methylation at R4 (P = 0.2121);Gain of methylation at R4 (P = 0.2121);

MVP

0.62

ClinPred

0.083

GERP RS

2.2

PromoterAI

-0.15

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.39

gMVP

0.37

Mutation Taster

=117/83

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over