rs776091682

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_020226.4(PRDM8):c.1650G>C(p.Gln550His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000765 in 1,569,152 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. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q550P) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000078 ( 0 hom. )

Consequence

PRDM8
NM_020226.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.18

Publications

1 publications found

Variant links:

Genes affected

PRDM8 (HGNC:13993): (PR/SET domain 8) This gene encodes a protein that belongs to a conserved family of histone methyltransferases that predominantly act as negative regulators of transcription. The encoded protein contains an N-terminal Su(var)3-9, Enhancer-of-zeste, and Trithorax (SET) domain and a double zinc-finger domain. Knockout of this gene in mouse results in mistargeting by neurons of the dorsal telencephalon, abnormal itch-like behavior, and impaired differentiation of rod bipolar cells. In humans, the protein has been shown to interact with the phosphatase laforin and the ubiquitin ligase malin, which regulate glycogen construction in the cytoplasm. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2016]

PRDM8 Gene-Disease associations (from GenCC):

early-onset Lafora body disease
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)

PRDM8 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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=0.24718061).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020226.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRDM8	NM_001099403.2	MANE Select	c.1650G>C	p.Gln550His	missense	Exon 4 of 4	NP_001092873.1
	PRDM8	NM_020226.4		c.1650G>C	p.Gln550His	missense	Exon 10 of 10	NP_064611.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
PRDM8	ENST00000415738.3	TSL:1 MANE Select	c.1650G>C	p.Gln550His	missense	Exon 4 of 4	ENSP00000406998.2
PRDM8	ENST00000339711.8	TSL:1	c.1650G>C	p.Gln550His	missense	Exon 10 of 10	ENSP00000339764.4
PRDM8	ENST00000952376.1		c.1653G>C	p.Gln551His	missense	Exon 4 of 4	ENSP00000622435.1

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

151922

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000291

AC:

AN:

172026

AF XY:

0.0000104

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000168

Gnomad ASJ exome

AF:

0.00

Gnomad EAS 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:

0.00000776

AC:

AN:

1417230

Hom.:

Cov.:

AF XY:

0.00000569

AC XY:

AN XY:

703256

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31654

American (AMR)

AF:

0.000145

AC:

AN:

41346

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25380

East Asian (EAS)

AF:

0.00

AC:

AN:

37428

South Asian (SAS)

AF:

0.00

AC:

AN:

82456

European-Finnish (FIN)

AF:

0.00

AC:

AN:

36410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5424

European-Non Finnish (NFE)

AF:

0.00000455

AC:

AN:

1098170

Other (OTH)

AF:

0.00

AC:

AN:

58962

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.520

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000658

AC:

AN:

151922

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74224

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

41404

American (AMR)

AF:

0.0000655

AC:

AN:

15268

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5140

South Asian (SAS)

AF:

0.00

AC:

AN:

4808

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10586

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67932

Other (OTH)

AF:

0.00

AC:

AN:

2090

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.325

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.0000269

AC:

ClinVar

ClinVar submissions as Germline

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

Early-onset Lafora body disease (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.28

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.33

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.031

Eigen

Benign

0.088

Eigen_PC

Benign

0.028

FATHMM_MKL

Uncertain

0.83

LIST_S2

Benign

0.69

M_CAP

Pathogenic

0.39

MetaRNN

Benign

0.25

MetaSVM

Benign

-0.71

MutationAssessor

Benign

0.69

PhyloP100

1.2

PrimateAI

Pathogenic

0.92

PROVEAN

Benign

-1.5

REVEL

Benign

0.16

Sift

Uncertain

0.011

Sift4G

Benign

0.13

Polyphen

0.99

Vest4

0.17

MutPred

0.23

Loss of disorder (P = 0.1071)

MVP

0.71

ClinPred

0.30

GERP RS

2.0

Varity_R

0.10

gMVP

0.61

Mutation Taster

=73/27

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over