rs137852540

chrX-107640936-A-G

Variant summary

Our verdict is Pathogenic. Variant got 17 ACMG points: 17P and 0B. PM1 PM2 PP2 PP3_Strong PP5_Very_Strong

The NM_002764.4(PRPS1):c.341A>G(p.Asn114Ser) variant causes a missense change involving the alteration of a 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 Likely pathogenic (★★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: PRPS1 NM_002764.4 missense
• Clinical Significance: Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 8.84

Genes affected

PRPS1 (HGNC:9462): (phosphoribosyl pyrophosphate synthetase 1) This gene encodes an enzyme that catalyzes the phosphoribosylation of ribose 5-phosphate to 5-phosphoribosyl-1-pyrophosphate, which is necessary for purine metabolism and nucleotide biosynthesis. Defects in this gene are a cause of phosphoribosylpyrophosphate synthetase superactivity, Charcot-Marie-Tooth disease X-linked recessive type 5 and Arts Syndrome. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Feb 2011]

ACMG classification

Verdict is Pathogenic. Variant got 17 ACMG points.

• PM1: In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 uncertain in NM_002764.4
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, PRPS1
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.944
• PP5: Variant X-107640936-A-G is Pathogenic according to our data. Variant chrX-107640936-A-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 9928.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chrX-107640936-A-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PRPS1	NM_002764.4	c.341A>G	p.Asn114Ser	missense_variant	3/7	ENST00000372435.10
PRPS1	NM_001204402.2	c.-82-4241A>G		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PRPS1	ENST00000372435.10	c.341A>G	p.Asn114Ser	missense_variant	3/7	1	NM_002764.4	P1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 23

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Inborn genetic diseases Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

May 10, 2017

- -

Arts syndrome Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Baylor Genetics

Apr 02, 2020

This variant was determined to be likely pathogenic according to ACMG Guidelines, 2015 [PMID:25741868]. -

Phosphoribosylpyrophosphate synthetase superactivity Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Dec 15, 1993

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.30
BayesDel_addAF	Uncertain	0.098	D
BayesDel_noAF	Benign	-0.10
Cadd	Pathogenic	26
Dann	Uncertain	1.0
DEOGEN2	Pathogenic	0.88	D;.;D
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.97	D;D;D
M_CAP	Pathogenic	0.75	D
MetaRNN	Pathogenic	0.94	D;D;D
MetaSVM	Uncertain	0.74	D
MutationAssessor	Pathogenic	3.1	M;.;.
MutationTaster	Benign	1.0	A;A;A;A;A
PrimateAI	Uncertain	0.67	T
PROVEAN	Pathogenic	-4.4	D;.;D
REVEL	Pathogenic	0.77
Sift	Uncertain	0.0020	D;.;D
Sift4G	Uncertain	0.018	D;.;D
Polyphen		0.68	P;.;.
Vest4		0.66
MutPred		0.79		Loss of stability (P = 0.0479);Loss of stability (P = 0.0479);Loss of stability (P = 0.0479);
MVP		0.99
MPC		2.0
ClinPred		0.99	D
GERP RS		4.8
Varity_R		0.87
gMVP		0.98

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: rs137852540; hg19: chrX-106884166;