rs773409738

Positions:

• chr10-70600656-C-T

Variant summary

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

The NM_001083116.3(PRF1):​c.247G>A​(p.Gly83Ser) 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 1,461,264 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 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)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: PRF1 NM_001083116.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.832

Genes affected

PRF1 (HGNC:9360): (perforin 1) This gene encodes a protein with structural similarities to complement component C9 that is important in immunity. This protein forms membrane pores that allow the release of granzymes and subsequent cytolysis of target cells. Whether pore formation occurs in the plasma membrane of target cells or in an endosomal membrane inside target cells is subject to debate. Mutations in this gene are associated with a variety of human disease including diabetes, multiple sclerosis, lymphomas, autoimmune lymphoproliferative syndrome (ALPS), aplastic anemia, and familial hemophagocytic lymphohistiocytosis type 2 (FHL2), a rare and lethal autosomal recessive disorder of early childhood. [provided by RefSeq, Aug 2017]

PALD1 (HGNC:23530): (phosphatase domain containing paladin 1) Predicted to enable protein tyrosine phosphatase activity. Predicted to be involved in peptidyl-tyrosine dephosphorylation. Located in cytosol. [provided by Alliance of Genome Resources, Apr 2022]

PRF1 (HGNC:):

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=0.1562146).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PRF1	NM_001083116.3	c.247G>A	p.Gly83Ser	missense_variant	2/3	ENST00000441259.2	NP_001076585.1
PRF1	NM_005041.6	c.247G>A	p.Gly83Ser	missense_variant	2/3		NP_005032.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PRF1	ENST00000441259.2	c.247G>A	p.Gly83Ser	missense_variant	2/3	5	NM_001083116.3	ENSP00000398568.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000800 AC: 2 AN: 249908 Hom.: 0 AF XY: 0.00000739 AC XY: 1 AN XY: 135276

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000290

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

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: 1461264 Hom.: 0 Cov.: 34 AF XY: 0.00000275 AC XY: 2 AN XY: 726882

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: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Familial hemophagocytic lymphohistiocytosis 2 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jun 23, 2018

This sequence change replaces glycine with serine at codon 83 of the PRF1 protein (p.Gly83Ser). The glycine residue is moderately conserved and there is a small physicochemical difference between glycine and serine. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with PRF1-related disease. This variant is present in population databases (rs773409738, ExAC 0.009%). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.36
CADD	Benign	15
DANN	Uncertain	0.99
DEOGEN2	Benign	0.41	.;T;T
Eigen	Benign	-0.39
Eigen_PC	Benign	-0.50
FATHMM_MKL	Benign	0.086	N
LIST_S2	Benign	0.78	T;.;T
M_CAP	Benign	0.047	D
MetaRNN	Benign	0.16	T;T;T
MetaSVM	Uncertain	-0.19	T
MutationAssessor	Uncertain	2.6	.;M;M
PrimateAI	Benign	0.29	T
PROVEAN	Uncertain	-2.5	.;N;N
REVEL	Uncertain	0.32
Sift	Benign	0.084	.;T;T
Sift4G	Benign	0.080	.;T;T
Polyphen		0.72	.;P;P
Vest4		0.13, 0.12
MutPred		0.36		Gain of disorder (P = 0.0811);Gain of disorder (P = 0.0811);Gain of disorder (P = 0.0811);
MVP		0.80
MPC		0.14
ClinPred		0.28	T
GERP RS		3.7
Varity_R		0.087
gMVP		0.58

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		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: rs773409738; hg19: chr10-72360412;