chr19-40394022-C-G

Variant names:

• chr19-40394022-C-G
• rs2079403438
• NM_181882.3:c.4330G>C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_181882.3(PRX):​c.4330G>C​(p.Glu1444Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PRX NM_181882.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.54

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 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.32112226).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PRX	NM_181882.3	c.4330G>C	p.Glu1444Gln	missense_variant	Exon 7 of 7	ENST00000324001.8	NP_870998.2
PRX	NM_001411127.1	c.4615G>C	p.Glu1539Gln	missense_variant	Exon 7 of 7		NP_001398056.1
PRX	XM_017027047.2	c.4228G>C	p.Glu1410Gln	missense_variant	Exon 4 of 4		XP_016882536.1
PRX	NM_020956.2	c.*4535G>C		3_prime_UTR_variant	Exon 6 of 6		NP_066007.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PRX	ENST00000324001.8	c.4330G>C	p.Glu1444Gln	missense_variant	Exon 7 of 7	1	NM_181882.3	ENSP00000326018.6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Dejerine-Sottas disease Uncertain:1

Dec 16, 2019

Baylor Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.21	T
Eigen	Benign	0.14
Eigen_PC	Benign	0.099
FATHMM_MKL	Benign	0.32	N
LIST_S2	Benign	0.76	T
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.32	T
MetaSVM	Benign	-0.85	T
MutationAssessor	Benign	1.0	L
PrimateAI	Uncertain	0.70	T
PROVEAN	Benign	-1.2	N
REVEL	Benign	0.14
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.028	D
Polyphen		1.0	D
Vest4		0.34
MutPred		0.12		Gain of MoRF binding (P = 0.0582);
MVP		0.57
MPC		0.54
ClinPred		0.93	D
GERP RS		4.8
Varity_R		0.35
gMVP		0.34

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: rs2079403438; hg19: chr19-40899929;