dbSNP rs201636741: TMEM231:p.Pro166Pro (chr16-75545436-C-T) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 1P and 9B. PP3BP6BS1BS2

The NM_001077418.3(TMEM231):c.498G>A(p.Pro166Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00082 in 1,605,626 control chromosomes in the GnomAD database, including 8 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 0.0043 ( 5 hom., cov: 21)

Exomes 𝑓: 0.00047 ( 3 hom. )

Consequence

TMEM231
NM_001077418.3 synonymous

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:3

Conservation

PhyloP100: -4.67

Publications

0 publications found

Variant links:

Genes affected

TMEM231 (HGNC:37234): (transmembrane protein 231) This gene encodes a transmembrane protein, which is a component of the B9 complex involved in the formation of the diffusion barrier between the cilia and plasma membrane. Mutations in this gene cause Joubert syndrome (JBTS). Multiple alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jan 2013]

TMEM231 Gene-Disease associations (from GenCC):

ciliopathy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
Joubert syndrome 20
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, PanelApp Australia
Meckel syndrome, type 11
Inheritance: AR Classification: STRONG Submitted by: PanelApp Australia
Joubert syndrome with oculorenal defect
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Meckel syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
orofaciodigital syndrome III
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

TMEM231 links:

ENSG00000259992 (HGNC:):

ENSG00000259992 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

PP3

Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

BP6

Variant 16-75545436-C-T is Benign according to our data. Variant chr16-75545436-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 385987.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00428 (638/149212) while in subpopulation AFR AF = 0.0144 (583/40402). AF 95% confidence interval is 0.0135. There are 5 homozygotes in GnomAd4. There are 315 alleles in the male GnomAd4 subpopulation. Median coverage is 21. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 5 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001077418.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TMEM231	NM_001077418.3	MANE Select	c.498G>A	p.Pro166Pro	synonymous	Exon 4 of 7	NP_001070886.1	Q9H6L2-1
TMEM231	NM_001077416.2		c.657G>A	p.Pro219Pro	synonymous	Exon 3 of 6	NP_001070884.2	Q9H6L2
TMEM231	NR_074083.2		n.664G>A		non_coding_transcript_exon	Exon 4 of 7

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TMEM231	ENST00000258173.11	TSL:1 MANE Select	c.498G>A	p.Pro166Pro	synonymous	Exon 4 of 7	ENSP00000258173.5	Q9H6L2-1
TMEM231	ENST00000568377.5	TSL:1	c.585G>A	p.Pro195Pro	synonymous	Exon 3 of 6	ENSP00000476267.1	Q9H6L2-2
TMEM231	ENST00000565067.5	TSL:5	c.438+390G>A		intron	N/A	ENSP00000457254.1	H3BTN6

Frequencies

GnomAD3 genomes

AF:

0.00429

AC:

639

AN:

149096

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00291

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000223

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000741

Gnomad OTH

AF:

0.00297

GnomAD2 exomes

AF:

0.00121

AC:

300

AN:

246996

AF XY:

0.000999

show subpopulations

Gnomad AFR exome

AF:

0.0148

Gnomad AMR exome

AF:

0.00150

Gnomad ASJ exome

AF:

0.000504

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000447

Gnomad OTH exome

AF:

0.00150

GnomAD4 exome

AF:

0.000466

AC:

678

AN:

1456414

Hom.:

Cov.:

AF XY:

0.000407

AC XY:

295

AN XY:

724352

show subpopulations

African (AFR)

AF:

0.0145

AC:

482

AN:

33276

American (AMR)

AF:

0.00162

AC:

AN:

44340

Ashkenazi Jewish (ASJ)

AF:

0.000192

AC:

AN:

26024

East Asian (EAS)

AF:

0.00

AC:

AN:

39612

South Asian (SAS)

AF:

0.0000698

AC:

AN:

85986

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53368

Middle Eastern (MID)

AF:

0.00106

AC:

AN:

5680

European-Non Finnish (NFE)

AF:

0.0000334

AC:

AN:

1108000

Other (OTH)

AF:

0.00116

AC:

AN:

60128

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.452

Heterozygous variant carriers

118

147

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<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

AF:

0.00428

AC:

638

AN:

149212

Hom.:

Cov.:

AF XY:

0.00434

AC XY:

315

AN XY:

72662

show subpopulations

African (AFR)

AF:

0.0144

AC:

583

AN:

40402

American (AMR)

AF:

0.00290

AC:

AN:

14812

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3440

East Asian (EAS)

AF:

0.00

AC:

AN:

5046

South Asian (SAS)

AF:

0.000223

AC:

AN:

4486

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10298

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.0000741

AC:

AN:

67488

Other (OTH)

AF:

0.00294

AC:

AN:

2042

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.497

Heterozygous variant carriers

112

140

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.00217

Hom.:

Bravo

AF:

0.00487

EpiCase

AF:

0.000109

EpiControl

AF:

0.0000593

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (2)

Joubert syndrome 20;C3809352:Meckel syndrome, type 11 (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.081

BayesDel_noAF

Benign

-0.86

CADD

Benign

(source)

DANN

Benign

0.77

PhyloP100

-4.7

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.76

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.76

Position offset: -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

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over