chr19-10021612-C-T

Position:

• chr19-10021612-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_015725.4(RDH8):​c.799C>T​(p.Leu267Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: RDH8 NM_015725.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.17

Genes affected

RDH8 (HGNC:14423): (retinol dehydrogenase 8) This gene encodes a member of the short-chain dehydrogenase/reductase family. The encoded protein catalyzes the reduction of all-trans-retinal to all-trans-retinol, the first reaction step of the rhodopsin regeneration pathway. This enzymatic reaction is the rate-limiting step in the visual cycle. [provided by RefSeq, Feb 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.86

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RDH8	NM_015725.4	c.799C>T	p.Leu267Phe	missense_variant	6/6	ENST00000591589.3	NP_056540.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RDH8	ENST00000591589.3	c.799C>T	p.Leu267Phe	missense_variant	6/6	1	NM_015725.4	ENSP00000466058.2
RDH8	ENST00000651512.1	c.859C>T	p.Leu287Phe	missense_variant	6/6			ENSP00000498711.1
RDH8	ENST00000587782.1	c.*6C>T		3_prime_UTR_variant	3/3	2		ENSP00000465773.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 21, 2024

The c.859C>T (p.R287C) alteration is located in exon 6 (coding exon 6) of the RDH8 gene. This alteration results from a C to T substitution at nucleotide position 859, causing the arginine (R) at amino acid position 287 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Uncertain	0.087	D
BayesDel_noAF	Benign	-0.11
CADD	Uncertain	24
DANN	Uncertain	1.0
Eigen	Uncertain	0.33
Eigen_PC	Benign	0.18
FATHMM_MKL	Uncertain	0.76	D
LIST_S2	Benign	0.53	T
M_CAP	Uncertain	0.29	D
MetaRNN	Pathogenic	0.86	D
MetaSVM	Uncertain	0.52	D
PrimateAI	Uncertain	0.55	T
Sift4G	Uncertain	0.0070	D
Vest4		0.57
MVP		0.84
MPC		0.68
ClinPred		0.90	D
GERP RS		4.6

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-10132288;