15-74180120-C-T

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM2PP3_StrongPP5_Moderate

The NM_022369.4(STRA6):c.1964G>A(p.Arg655His) variant causes a missense change. The variant allele was found at a frequency of 0.0000143 in 1,613,558 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R655C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

STRA6
NM_022369.4 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:2O:1

Conservation

PhyloP100: 4.60

Variant links:

Genes affected

STRA6 (HGNC:30650): (signaling receptor and transporter of retinol STRA6) The protein encoded by this gene is a membrane protein involved in the metabolism of retinol. The encoded protein acts as a receptor for retinol/retinol binding protein complexes. This protein removes the retinol from the complex and transports it across the cell membrane. Defects in this gene are a cause of syndromic microphthalmia type 9 (MCOPS9). Several transcript variants encoding a few different isoforms have been found for this gene. [provided by RefSeq, Dec 2008]

STRA6 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.983

PP5

Variant 15-74180120-C-T is Pathogenic according to our data. Variant chr15-74180120-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 40079.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr15-74180120-C-T is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
STRA6	NM_022369.4 linkuse as main transcript	c.1964G>A	p.Arg655His	missense_variant	19/19	ENST00000395105.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
STRA6	ENST00000395105.9 linkuse as main transcript	c.1964G>A	p.Arg655His	missense_variant	19/19	1	NM_022369.4	P1	Q9BX79-1

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152190

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251222

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135820

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:

0.00

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000137

AC:

AN:

1461368

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

726938

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:

0.00

Gnomad4 FIN exome

AF:

0.0000188

Gnomad4 NFE exome

AF:

0.0000153

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152190

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74352

show subpopulations

Gnomad4 AFR

AF:

0.0000241

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:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000264

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2Other:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Matthew-Wood syndrome

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Nov 01, 2009

- -

not provided

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Dec 08, 2015

The R655H variant in the STRA6 gene has been reported previously in the compound heterozygous state, opposite of a second STRA6 missense variant, in an individual with PDAC syndrome, characterized by bilateral colobomatous microphthalmia, patent ductus arteriosus, broad, bushy eyebrows, broad nasal bridge, retrognathia, large ears with otherwise normal development (Segel et al., 2009). The R655H variant was not observed in approximately 6500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The R655H variant is a conservative amino acid substitution, which is not likely to impact secondary protein structure as these residues share similar properties. This substitution occurs at a position that is conserved across species. In silico analysis predicts this variant is probably damaging to the protein structure/function. A different, but same codon variant (R655C) has been reported in the Human Gene Mutation Database in association with an STRA6-related disorder (Stenson et al., 2014), supporting the functional importance of this region of the protein. Therefore, we interpret the R655H variant as a strong candidate for a pathogenic variant, however the possibility it may be a rare benign variant cannot be excluded. -

STRA6-related disorder

Other:1

not provided, no classification provided

phenotyping only

GenomeConnect, ClinGen

GenomeConnect assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. GenomeConnect staff make no attempt to reinterpret the clinical significance of the variant. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.36

BayesDel_addAF

Pathogenic

0.44

BayesDel_noAF

Pathogenic

0.41

Cadd

Pathogenic

Dann

Pathogenic

1.0

DEOGEN2

Uncertain

0.79

D;.;D;D;.;D;.;.;.

Eigen

Uncertain

0.61

Eigen_PC

Uncertain

0.53

FATHMM_MKL

Uncertain

0.84

M_CAP

Uncertain

0.24

MetaRNN

Pathogenic

0.98

D;D;D;D;D;D;D;D;D

MetaSVM

Pathogenic

0.86

MutationAssessor

Uncertain

2.9

M;.;M;M;.;M;.;.;.

MutationTaster

Benign

1.0

D;D;D;D;D;D;D;D

PrimateAI

Uncertain

0.57

PROVEAN

Uncertain

-3.3

D;D;D;.;.;.;D;.;.

REVEL

Pathogenic

0.90

Sift

Pathogenic

0.0

D;D;D;.;.;.;D;.;.

Sift4G

Pathogenic

0.0

D;D;D;D;D;D;D;D;D

Polyphen

1.0

D;D;D;D;.;D;.;D;.

Vest4

0.86

MutPred

0.95

Loss of MoRF binding (P = 0.0334);.;Loss of MoRF binding (P = 0.0334);Loss of MoRF binding (P = 0.0334);.;Loss of MoRF binding (P = 0.0334);.;.;.;

MVP

0.90

MPC

0.54

ClinPred

0.98

GERP RS

4.5

Varity_R

0.62

gMVP

0.80

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

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