rs779294844

chr19-40396137-C-Achr19-40396137-C-Gchr19-40396137-C-T

Variant summary

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

The NM_181882.3(PRX):c.2215G>T(p.Asp739Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,540 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D739N) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: PRX NM_181882.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.445

Genes affected

PRX (HGNC:13797): (periaxin) This gene encodes a protein involved in peripheral nerve myelin upkeep. The encoded protein contains 2 PDZ domains which were named after PSD95 (post synaptic density protein), DlgA (Drosophila disc large tumor suppressor), and ZO1 (a mammalian tight junction protein). Two alternatively spliced transcript variants have been described for this gene which encode different protein isoforms and which are targeted differently in the Schwann cell. Mutations in this gene cause Charcot-Marie-Tooth neuoropathy, type 4F and Dejerine-Sottas neuropathy. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PRX	NM_181882.3	c.2215G>T	p.Asp739Tyr	missense_variant	7/7	ENST00000324001.8
PRX	NM_001411127.1	c.2500G>T	p.Asp834Tyr	missense_variant	7/7
PRX	XM_017027047.2	c.2113G>T	p.Asp705Tyr	missense_variant	4/4
PRX	NM_020956.2	c.*2420G>T		3_prime_UTR_variant	6/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PRX	ENST00000324001.8	c.2215G>T	p.Asp739Tyr	missense_variant	7/7	1	NM_181882.3	A2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000797 AC: 2 AN: 251072 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135768

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000578

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461540 Hom.: 0 Cov.: 38 AF XY: 0.00 AC XY: 0 AN XY: 727064

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

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.21
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.32
Cadd	Benign	21
Dann	Uncertain	0.99
DEOGEN2	Uncertain	0.66	D
Eigen	Uncertain	0.30
Eigen_PC	Benign	0.18
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Benign	0.77	T
M_CAP	Benign	0.024	T
MetaRNN	Uncertain	0.54	D
MetaSVM	Benign	-0.95	T
MutationAssessor	Uncertain	2.6	M
MutationTaster	Benign	1.0	D;D
PrimateAI	Benign	0.36	T
PROVEAN	Pathogenic	-6.6	D
REVEL	Benign	0.17
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0070	D
Polyphen		1.0	D
Vest4		0.51
MutPred		0.38		Gain of phosphorylation at D739 (P = 0.0155);
MVP		0.66
MPC		0.91
ClinPred		0.87	D
GERP RS		4.8
Varity_R		0.36
gMVP		0.31

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: rs779294844; hg19: chr19-40902044;