NM_001371279.1:c.337C>T

Variant names:

• chr2-86252037-G-A
• rs121918263
• NM_001371279.1:c.337C>T

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_001371279.1(REEP1):​c.337C>T​(p.Arg113*) variant causes a stop gained change. The variant allele was found at a frequency of 0.00000137 in 1,461,788 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 (★★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: REEP1 NM_001371279.1 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:8
• Conservation: PhyloP100: 5.07
• Publications: 8 publications found

Genes affected

REEP1 (HGNC:25786): (receptor accessory protein 1) This gene encodes a mitochondrial protein that functions to enhance the cell surface expression of odorant receptors. Mutations in this gene cause spastic paraplegia autosomal dominant type 31, a neurodegenerative disorder. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2009]

REEP1 Gene-Disease associations (from GenCC):

• hereditary spastic paraplegia 31

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet
• neuronopathy, distal hereditary motor, type 5B

  Inheritance: AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• neuronopathy, distal hereditary motor, type 5A

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• spinal muscular atrophy, distal, autosomal recessive, 6

  Inheritance: AR Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics

ACMG classification

Our verdict: Pathogenic. The variant received 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 2-86252037-G-A is Pathogenic according to our data. Variant chr2-86252037-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 1863.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001371279.1. 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
	REEP1	NM_001371279.1	MANE Select	c.337C>T	p.Arg113*	stop_gained	Exon 5 of 9	NP_001358208.1
	REEP1	NM_001410855.1		c.337C>T	p.Arg113*	stop_gained	Exon 5 of 8	NP_001397784.1
	REEP1	NM_001410856.1		c.337C>T	p.Arg113*	stop_gained	Exon 5 of 8	NP_001397785.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	REEP1	ENST00000538924.7	TSL:5 MANE Select	c.337C>T	p.Arg113*	stop_gained	Exon 5 of 9	ENSP00000438346.3
	REEP1	ENST00000165698.9	TSL:1	c.337C>T	p.Arg113*	stop_gained	Exon 5 of 7	ENSP00000165698.5
	REEP1	ENST00000908467.1		c.337C>T	p.Arg113*	stop_gained	Exon 5 of 9	ENSP00000578526.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461788 Hom.: 0 Cov.: 32 AF XY: 0.00000275 AC XY: 2 AN XY: 727208

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86252

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53412

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111924

Other (OTH) AF: 0.00 AC: 0 AN: 60394

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
5	-	-	Hereditary spastic paraplegia 31 (5)
2	-	-	not provided (2)
1	-	-	Hereditary spastic paraplegia (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.54
CADD	Pathogenic	39
DANN	Uncertain	1.0
Eigen	Pathogenic	0.81
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Uncertain	0.84	D
PhyloP100		5.1
Vest4		0.96
GERP RS		5.0
Mutation Taster		=0/200	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs121918263; hg19: chr2-86479160; COSMIC: COSV51256972;