chr15-74181301-C-G

Variant names:

• chr15-74181301-C-G
• rs397514638
• NM_022369.4:c.1678G>C

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM2 PP3_Strong PP5

The NM_001199042.2(STRA6):​c.1795G>C​(p.Asp599His) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,078 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 Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D599N) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: STRA6 NM_001199042.2 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 4.49
• Publications: 5 publications found

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 Gene-Disease associations (from GenCC):

• Matthew-Wood syndrome

  Inheritance: AR, AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: PanelApp Australia, G2P, Labcorp Genetics (formerly Invitae), Orphanet
• microphthalmia, isolated, with coloboma

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.991
• PP5: Variant 15-74181301-C-G is Pathogenic according to our data. Variant chr15-74181301-C-G is described in ClinVar as Pathogenic. ClinVar VariationId is 40078.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001199042.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	STRA6	NM_022369.4	MANE Select	c.1678G>C	p.Asp560His	missense	Exon 17 of 19	NP_071764.3
	STRA6	NM_001199042.2		c.1795G>C	p.Asp599His	missense	Exon 17 of 19	NP_001185971.1
	STRA6	NM_001199040.2		c.1789G>C	p.Asp597His	missense	Exon 17 of 19	NP_001185969.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	STRA6	ENST00000395105.9	TSL:1 MANE Select	c.1678G>C	p.Asp560His	missense	Exon 17 of 19	ENSP00000378537.4
	STRA6	ENST00000563965.5	TSL:1	c.1795G>C	p.Asp599His	missense	Exon 17 of 19	ENSP00000456609.1
	STRA6	ENST00000423167.6	TSL:1	c.1651G>C	p.Asp551His	missense	Exon 17 of 19	ENSP00000413012.2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461078 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 726858

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33468

American (AMR) AF: 0.00 AC: 0 AN: 44712

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.00 AC: 0 AN: 86218

European-Finnish (FIN) AF: 0.0000189 AC: 1 AN: 52896

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5736

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111856

Other (OTH) AF: 0.00 AC: 0 AN: 60364

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 31

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Matthew-Wood syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.86
BayesDel_addAF	Pathogenic	0.45	D
BayesDel_noAF	Pathogenic	0.40
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.81	D
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Uncertain	0.80	D
LIST_S2	Uncertain	0.91	D
M_CAP	Pathogenic	0.35	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	0.90	D
MutationAssessor	Uncertain	2.9	M
PhyloP100		4.5
PrimateAI	Uncertain	0.55	T
PROVEAN	Pathogenic	-6.0	D
REVEL	Pathogenic	0.90
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.97
MutPred		0.91		Gain of methylation at R555 (P = 0.0786)
MVP		0.88
MPC		0.53
ClinPred		0.99	D
GERP RS		4.7
Varity_R		0.82
gMVP		0.88
Mutation Taster		=0/100	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs397514638; hg19: chr15-74473642;