5-138441398-T-G

Position:

• chr5-138441398-T-G

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM2 PP3_Moderate PP5_Very_Strong

The NM_001271803.2(REEP2):​c.119T>G​(p.Met40Arg) variant causes a missense change. 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 Pathogenic (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: REEP2 NM_001271803.2 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 6.28

Genes affected

REEP2 (HGNC:17975): (receptor accessory protein 2) This gene encodes a member of the receptor expression enhancing protein family. Studies of a related gene in mouse suggest that the encoded protein is found in the cell membrane and enhances the function of sweet taste receptors. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2012]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.901
• PP5: Variant 5-138441398-T-G is Pathogenic according to our data. Variant chr5-138441398-T-G is described in ClinVar as [Pathogenic]. Clinvar id is 864419.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
REEP2	NM_001271803.2	c.119T>G	p.Met40Arg	missense_variant	3/8	ENST00000378339.7	NP_001258732.1
REEP2	NM_016606.4	c.119T>G	p.Met40Arg	missense_variant	3/8		NP_057690.2
REEP2	NR_073448.2	n.346T>G		non_coding_transcript_exon_variant	3/8
REEP2	NR_073449.2	n.346T>G		non_coding_transcript_exon_variant	3/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
REEP2	ENST00000378339.7	c.119T>G	p.Met40Arg	missense_variant	3/8	1	NM_001271803.2	ENSP00000367590	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hereditary spastic paraplegia 72 Pathogenic:3

Pathogenic, no assertion criteria provided	literature only	OMIM	Nov 29, 2023	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Aug 23, 2022	This sequence change replaces methionine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 40 of the REEP2 protein (p.Met40Arg). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with hereditary spastic paraplegia (PMID: 28491902, 33526816; Invitae). In at least one individual the variant was observed to be de novo. ClinVar contains an entry for this variant (Variation ID: 864419). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Paris Brain Institute, Inserm - ICM	-	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.49	D
BayesDel_noAF	Pathogenic	0.47
CADD	Pathogenic	29
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.78	.;D;.;T
Eigen	Uncertain	0.63
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Pathogenic	0.98	D;D;D;D
M_CAP	Pathogenic	0.48	D
MetaRNN	Pathogenic	0.90	D;D;D;D
MetaSVM	Pathogenic	0.89	D
MutationAssessor	Pathogenic	3.5	M;M;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.84	D
PROVEAN	Pathogenic	-6.0	D;D;D;.
REVEL	Pathogenic	0.93
Sift	Pathogenic	0.0	D;D;D;.
Sift4G	Pathogenic	0.0	D;D;D;D
Polyphen		0.96	.;D;.;.
Vest4		0.79
MutPred		0.68		Gain of MoRF binding (P = 0.0199);Gain of MoRF binding (P = 0.0199);.;.;
MVP		0.98
MPC		2.1
ClinPred		0.99	D
GERP RS		4.1
Varity_R		0.97
gMVP		0.98

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs1763822813; hg19: chr5-137777087;