chr16-75556319-G-T

Variant names:

• chr16-75556319-G-T
• ENST00000564489.1:n.217-346C>A

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The ENST00000564489.1(ENSG00000259992):​n.217-346C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: ENSG00000259992 ENST00000564489.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.658
• Publications: 0 publications found

Genes affected

ENSG00000259992 (HGNC:):

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: 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 III

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.59).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TMEM231	NM_001077418.3	c.-110C>A		upstream_gene_variant		ENST00000258173.11	NP_001070886.1
TMEM231	NM_001077416.2	c.-48C>A		upstream_gene_variant			NP_001070884.2
TMEM231	NR_074083.2	n.-67C>A		upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TMEM231	ENST00000258173.11	c.-110C>A		upstream_gene_variant		1	NM_001077418.3	ENSP00000258173.5
TMEM231	ENST00000568377.5	c.-120C>A		upstream_gene_variant		1		ENSP00000476267.1
TMEM231	ENST00000565067.5	c.-110C>A		upstream_gene_variant		5		ENSP00000457254.1
TMEM231	ENST00000562410.5	n.-110C>A		upstream_gene_variant		1		ENSP00000454582.1
TMEM231	ENST00000570006.5	n.-110C>A		upstream_gene_variant		5		ENSP00000455520.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 1189860 Hom.: 0 Cov.: 20 AF XY: 0.00 AC XY: 0 AN XY: 574072

African (AFR) AF: 0.00 AC: 0 AN: 23412

American (AMR) AF: 0.00 AC: 0 AN: 12320

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 17000

East Asian (EAS) AF: 0.00 AC: 0 AN: 28804

South Asian (SAS) AF: 0.00 AC: 0 AN: 51652

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 28882

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4602

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 973554

Other (OTH) AF: 0.00 AC: 0 AN: 49634

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.59
CADD	Benign	12
DANN	Benign	0.73
PhyloP100		0.66
PromoterAI		-0.23	Neutral

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

hg19: chr16-75590217;