19-1491348-G-A

Position:

• chr19-1491348-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_138393.4(REEP6):​c.79G>A​(p.Ala27Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000754 in 1,326,158 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.5e-7 (0 hom.)
• Consequence: REEP6 NM_138393.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.67

Genes affected

REEP6 (HGNC:30078): (receptor accessory protein 6) The protein encoded by this gene may be involved in the transport of receptors from the endoplasmic reticulum (ER) to the cell surface. The encoded protein may also play a role in regulating ER membrane structure. This gene is required for the proper development of retinal rods and photoreceptors, with defects in this gene being associated with retinitis pigmentosa 77. [provided by RefSeq, May 2017]

REEP6 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.18903169).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
REEP6	NM_001329556.3	c.79G>A	p.Ala27Thr	missense_variant	1/6	ENST00000395479.10	NP_001316485.1
REEP6	NM_138393.4	c.79G>A	p.Ala27Thr	missense_variant	1/5	ENST00000233596.8	NP_612402.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
REEP6	ENST00000395479.10	c.79G>A	p.Ala27Thr	missense_variant	1/6	3	NM_001329556.3	ENSP00000378861.5
REEP6	ENST00000233596.8	c.79G>A	p.Ala27Thr	missense_variant	1/5	1	NM_138393.4	ENSP00000233596.2
REEP6	ENST00000591735.2	n.183G>A		non_coding_transcript_exon_variant	1/3	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.54e-7 AC: 1 AN: 1326158 Hom.: 0 Cov.: 30 AF XY: 0.00000153 AC XY: 1 AN XY: 653370

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: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000183

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 14, 2023

This variant has not been reported in the literature in individuals affected with REEP6-related conditions. This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 27 of the REEP6 protein (p.Ala27Thr). This variant is not present in population databases (gnomAD no frequency). ClinVar contains an entry for this variant (Variation ID: 964903). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.079
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	22
DANN	Uncertain	0.98
Eigen	Benign	-0.044
Eigen_PC	Benign	-0.067
FATHMM_MKL	Uncertain	0.76	D
LIST_S2	Uncertain	0.91	D
M_CAP	Uncertain	0.24	D
MetaRNN	Benign	0.19	T
MetaSVM	Benign	-0.98	T
MutationAssessor	Uncertain	2.2	M
PrimateAI	Uncertain	0.67	T
PROVEAN	Benign	-1.4	N
REVEL	Benign	0.061
Sift	Benign	0.14	T
Sift4G	Benign	0.47	T
Vest4		0.081
MutPred		0.20		Loss of ubiquitination at K28 (P = 0.0901);
MVP		0.42
MPC		0.24
ClinPred		0.27	T
GERP RS		3.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.13

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

Other links and lift over

dbSNP: rs1173034302; hg19: chr19-1491347;