rs145939072

Variant names:

• chr11-61366132-C-T
• rs145939072
• NM_016464.5:c.216C>T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Moderate BP6 BP7 BS1 BS2

The NM_016464.5(TMEM138):​c.216C>T​(p.Asn72Asn) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000357 in 1,614,240 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.00039 (0 hom., cov: 31)
  • Exomes 𝑓: 0.00035 (2 hom.)
• Consequence: TMEM138 NM_016464.5 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:2
• Conservation: PhyloP100: 0.0890

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]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.32).
• BP6: Variant 11-61366132-C-T is Benign according to our data. Variant chr11-61366132-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 260747.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Benign=1, Uncertain_significance=1}.
• BP7: Synonymous conserved (PhyloP=0.089 with no splicing effect.
• BS1: Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000394 (60/152356) while in subpopulation SAS AF= 0.00124 (6/4832). AF 95% confidence interval is 0.000541. There are 0 homozygotes in gnomad4. There are 30 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck.
• BS2: High Homozygotes in GnomAdExome4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TMEM138	NM_016464.5	c.216C>T	p.Asn72Asn	synonymous_variant	Exon 3 of 5	ENST00000278826.11	NP_057548.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TMEM138	ENST00000278826.11	c.216C>T	p.Asn72Asn	synonymous_variant	Exon 3 of 5	1	NM_016464.5	ENSP00000278826.5

Frequencies

GnomAD3 genomes AF: 0.000388 AC: 59 AN: 152238 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00461

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00103

Gnomad FIN AF: 0.000847

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000382

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.000453 AC: 114 AN: 251484 Hom.: 0 AF XY: 0.000471 AC XY: 64 AN XY: 135916

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000434

Gnomad ASJ exome AF: 0.00397

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000980

Gnomad FIN exome AF: 0.000601

Gnomad NFE exome AF: 0.000378

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000354 AC: 517 AN: 1461884 Hom.: 2 Cov.: 30 AF XY: 0.000364 AC XY: 265 AN XY: 727246

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000380

Gnomad4 ASJ exome AF: 0.00478

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000464

Gnomad4 FIN exome AF: 0.000412

Gnomad4 NFE exome AF: 0.000274

Gnomad4 OTH exome AF: 0.000613

GnomAD4 genome AF: 0.000394 AC: 60 AN: 152356 Hom.: 0 Cov.: 31 AF XY: 0.000403 AC XY: 30 AN XY: 74502

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.00461

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00124

Gnomad4 FIN AF: 0.000847

Gnomad4 NFE AF: 0.000382

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.000579 Hom.: 0

Bravo AF: 0.000310

EpiCase AF: 0.000927

EpiControl AF: 0.000474

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Joubert syndrome 16 Uncertain:1 Benign:1

Jan 20, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

not specified Benign:1

-

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.32
CADD	Benign	7.2
DANN	Benign	0.76
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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

Other links and lift over

dbSNP: rs145939072; hg19: chr11-61133604;