20-4724667-C-A

Variant names:

• chr20-4724667-C-A
• rs368923140
• NM_012409.4:c.116C>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_012409.4(PRND):​c.116C>A​(p.Ala39Asp) 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 1,461,862 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. 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. A39V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: PRND NM_012409.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.02
• Publications: 0 publications found

Genes affected

PRND (HGNC:15748): (prion like protein doppel) This gene is found on chromosome 20, approximately 20 kbp downstream of the gene encoding cellular prion protein, to which it is biochemically and structurally similar. The protein encoded by this gene is a membrane glycosylphosphatidylinositol-anchored glycoprotein that is found predominantly in testis. Mutations in this gene may lead to neurological disorders. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.23277271).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_012409.4. 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
	PRND	NM_012409.4	MANE Select	c.116C>A	p.Ala39Asp	missense	Exon 2 of 2	NP_036541.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRND	ENST00000305817.3	TSL:1 MANE Select	c.116C>A	p.Ala39Asp	missense	Exon 2 of 2	ENSP00000306900.2	Q9UKY0

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461862 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727236

African (AFR) AF: 0.00 AC: 0 AN: 33480

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: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53390

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

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1112012

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Benign	-0.024	T
BayesDel_noAF	Benign	-0.27
CADD	Benign	16
DANN	Uncertain	0.99
DEOGEN2	Benign	0.40	T
Eigen	Benign	-0.26
Eigen_PC	Benign	-0.41
FATHMM_MKL	Benign	0.034	N
LIST_S2	Benign	0.85	T
M_CAP	Uncertain	0.090	D
MetaRNN	Benign	0.23	T
MetaSVM	Benign	-0.55	T
MutationAssessor	Uncertain	2.1	M
PhyloP100		1.0
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-2.1	N
REVEL	Benign	0.25
Sift	Uncertain	0.016	D
Sift4G	Uncertain	0.010	D
Polyphen		0.97	D
Vest4		0.15
MutPred		0.29		Loss of MoRF binding (P = 0.0545)
MVP		0.85
MPC		0.53
ClinPred		0.45	T
GERP RS		2.2
Varity_R		0.15
gMVP		0.25
Mutation Taster		=91/9	polymorphism

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: rs368923140; hg19: chr20-4705313;