19-40397071-G-C

Variant names:

• chr19-40397071-G-C
• NM_181882.3:c.1281C>G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_181882.3(PRX):​c.1281C>G​(p.Ile427Met) 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 1,461,764 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. I427I) has been classified as Benign.

• 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: -4.90

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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1292988).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PRX	NM_181882.3	c.1281C>G	p.Ile427Met	missense_variant	Exon 7 of 7	ENST00000324001.8	NP_870998.2
PRX	NM_001411127.1	c.1566C>G	p.Ile522Met	missense_variant	Exon 7 of 7		NP_001398056.1
PRX	XM_017027047.2	c.1179C>G	p.Ile393Met	missense_variant	Exon 4 of 4		XP_016882536.1
PRX	NM_020956.2	c.*1486C>G		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.1281C>G	p.Ile427Met	missense_variant	Exon 7 of 7	1	NM_181882.3	ENSP00000326018.6

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461764 Hom.: 0 Cov.: 36 AF XY: 0.00000138 AC XY: 1 AN XY: 727196

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 0.00000180

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	0.14
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.56
CADD	Benign	0.0090
DANN	Benign	0.95
DEOGEN2	Benign	0.26	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.019	N
LIST_S2	Benign	0.66	T
M_CAP	Benign	0.0043	T
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.9	L
PrimateAI	Benign	0.47	T
PROVEAN	Benign	-1.1	N
REVEL	Benign	0.15
Sift	Benign	0.065	T
Sift4G	Uncertain	0.011	D
Polyphen		0.78	P
Vest4		0.35
MutPred		0.16		Loss of glycosylation at S430 (P = 0.1295);
MVP		0.18
MPC		0.23
ClinPred		0.46	T
GERP RS		-8.7
Varity_R		0.092
gMVP		0.11

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-40902978;