chr2-210016639-A-G

Position:

• chr2-210016639-A-G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_199229.3(RPE):​c.475A>G​(p.Lys159Glu) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,852 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: RPE NM_199229.3 missense, splice_region
• Scores: Splicing: ADA: 0.3440
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.29

Genes affected

RPE (HGNC:10293): (ribulose-5-phosphate-3-epimerase) Enables metal ion binding activity; protein homodimerization activity; and ribulose-phosphate 3-epimerase activity. Involved in carbohydrate metabolic process and pentose-phosphate shunt. Located in extracellular exosome. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.96

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RPE	NM_199229.3	c.475A>G	p.Lys159Glu	missense_variant, splice_region_variant	4/6	ENST00000359429.11	NP_954699.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RPE	ENST00000359429.11	c.475A>G	p.Lys159Glu	missense_variant, splice_region_variant	4/6	1	NM_199229.3	ENSP00000352401.6

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461852 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727222

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000447

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: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

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

May 15, 2024

The c.475A>G (p.K159E) alteration is located in exon 4 (coding exon 4) of the RPE gene. This alteration results from a A to G substitution at nucleotide position 475, causing the lysine (K) at amino acid position 159 to be replaced by a glutamic acid (E). 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	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.50	D
BayesDel_noAF	Pathogenic	0.49
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.87	D;.;.;D;.;.;.;.;D;.;D;.;.;.
Eigen	Pathogenic	0.95
Eigen_PC	Pathogenic	0.89
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D;T;.;D;.;D;D;D;D;D;D;.;D;D
M_CAP	Uncertain	0.17	D
MetaRNN	Pathogenic	0.96	D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.33	D
MutationAssessor	Pathogenic	3.7	H;H;.;.;.;.;.;.;.;.;.;.;.;.
PrimateAI	Uncertain	0.62	T
PROVEAN	Uncertain	-3.5	D;.;D;D;D;D;D;D;D;D;D;D;D;D
REVEL	Pathogenic	0.96
Sift	Uncertain	0.0010	D;.;D;D;D;D;D;D;D;D;D;D;D;D
Sift4G	Pathogenic	0.0010	D;T;D;D;D;D;D;D;D;D;D;D;D;D
Polyphen		1.0	D;.;.;.;.;.;.;.;.;.;.;.;.;D
Vest4		0.95
MutPred		0.84		Loss of methylation at K159 (P = 0.0425);Loss of methylation at K159 (P = 0.0425);.;.;.;.;.;.;.;.;Loss of methylation at K159 (P = 0.0425);.;.;Loss of methylation at K159 (P = 0.0425);
MVP		0.53
MPC		0.90
ClinPred		1.0	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.8
Varity_R		0.95
gMVP		0.98

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.34
dbscSNV1_RF	Benign	0.53
SpliceAI score (max)		0.080		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: rs2093776306; hg19: chr2-210881363;