Genetic Variant NM_001077418.3:c.582+8C>T (chr16-75545344-G-A) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM2BP4_StrongBP6_Moderate

The NM_001077418.3(TMEM231):c.582+8C>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000046 in 1,608,762 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 23)

Exomes 𝑓: 0.000050 ( 0 hom. )

Consequence

TMEM231
NM_001077418.3 splice_region, intron

Scores

Splicing: ADA: 0.00003145

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: -1.17

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 links:

ENSG00000260092 (HGNC:):

ENSG00000260092 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.89).

BP6

Variant 16-75545344-G-A is Benign according to our data. Variant chr16-75545344-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 2163316.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
TMEM231	NM_001077418.3 link	c.582+8C>T	splice_region_variant, intron_variant	Intron 4 of 6	ENST00000258173.11	NP_001070886.1	Q9H6L2-1
TMEM231	NM_001077416.2 link	c.741+8C>T	splice_region_variant, intron_variant	Intron 3 of 5		NP_001070884.2	Q9H6L2
TMEM231	NR_074083.2 link	n.748+8C>T	splice_region_variant, intron_variant	Intron 4 of 6

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
TMEM231	ENST00000258173.11 link	c.582+8C>T	splice_region_variant, intron_variant	Intron 4 of 6	1	NM_001077418.3	ENSP00000258173.5	Q9H6L2-1
TMEM231	ENST00000568377.5 link	c.669+8C>T	splice_region_variant, intron_variant	Intron 3 of 5	1		ENSP00000476267.1	Q9H6L2-2
TMEM231	ENST00000565067.5 link	c.438+482C>T	intron_variant	Intron 3 of 5	5		ENSP00000457254.1	H3BTN6
ENSG00000260092	ENST00000460606.1 link	n.75+8C>T	splice_region_variant, intron_variant	Intron 1 of 4	1		ENSP00000457544.1	H3BUA1
TMEM231	ENST00000562410.5 link	n.*384+8C>T	splice_region_variant, intron_variant	Intron 4 of 6	1		ENSP00000454582.1	H3BMW7
TMEM231	ENST00000570006.5 link	n.544+8C>T	splice_region_variant, intron_variant	Intron 4 of 6	5		ENSP00000455520.1	H3BPY4

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

152090

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000121

AC:

AN:

247248

Hom.:

AF XY:

0.00000745

AC XY:

AN XY:

134172

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 SAS exome

AF:

0.0000657

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000893

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000501

AC:

AN:

1456672

Hom.:

Cov.:

AF XY:

0.0000553

AC XY:

AN XY:

723858

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000698

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000595

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.00000658

AC:

AN:

152090

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74302

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

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

EpiCase

AF:

0.000109

EpiControl

AF:

0.0000593

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Joubert syndrome 20;C3809352:Meckel syndrome, type 11

Benign:1

Nov 30, 2021

Labcorp Genetics (formerly Invitae), Labcorp

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

-0.89

CADD

Benign

0.27

DANN

Benign

0.37

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000031

dbscSNV1_RF

Benign

0.0

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