6-32841572-T-C

Variant names:

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 0P and 7B. BP4_ModerateBS1_SupportingBS2

The NM_148919.4(PSMB8):c.701A>G(p.Tyr234Cys) variant causes a missense change. The variant allele was found at a frequency of 0.000944 in 1,612,998 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00071 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00097 ( 4 hom. )

Consequence

PSMB8
NM_148919.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:1

Conservation

PhyloP100: 5.49

Publications

6 publications found

Variant links:

Genes affected

PSMB8 (HGNC:9545): (proteasome 20S subunit beta 8) The proteasome is a multicatalytic proteinase complex with a highly ordered ring-shaped 20S core structure. The core structure is composed of 4 rings of 28 non-identical subunits; 2 rings are composed of 7 alpha subunits and 2 rings are composed of 7 beta subunits. Proteasomes are distributed throughout eukaryotic cells at a high concentration and cleave peptides in an ATP/ubiquitin-dependent process in a non-lysosomal pathway. An essential function of a modified proteasome, the immunoproteasome, is the processing of class I MHC peptides. This gene encodes a member of the proteasome B-type family, also known as the T1B family, that is a 20S core beta subunit. This gene is located in the class II region of the MHC (major histocompatibility complex). Expression of this gene is induced by gamma interferon and this gene product replaces catalytic subunit 3 (proteasome beta 5 subunit) in the immunoproteasome. Proteolytic processing is required to generate a mature subunit. Two alternative transcripts encoding two isoforms have been identified; both isoforms are processed to yield the same mature subunit. [provided by RefSeq, Jul 2008]

PSMB8 Gene-Disease associations (from GenCC):

proteasome-associated autoinflammatory syndrome 1
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
proteosome-associated autoinflammatory syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

PSMB8 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -7 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.06939092).

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000709 (108/152328) while in subpopulation NFE AF = 0.00138 (94/68028). AF 95% confidence interval is 0.00116. There are 0 homozygotes in GnomAd4. There are 45 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High Homozygotes in GnomAdExome4 at 4 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PSMB8	NM_148919.4 link	c.701A>G	p.Tyr234Cys	missense_variant	Exon 5 of 6	ENST00000374882.8	NP_683720.2	P28062-1X5CMJ9
PSMB8	NM_004159.5 link	c.689A>G	p.Tyr230Cys	missense_variant	Exon 5 of 6		NP_004150.1	P28062-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PSMB8	ENST00000374882.8 link	c.701A>G	p.Tyr234Cys	missense_variant	Exon 5 of 6	1	NM_148919.4	ENSP00000364016.4		P28062-1

Frequencies

GnomAD3 genomes

AF:

0.000710

AC:

108

AN:

152210

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000193

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

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:

0.00138

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000592

AC:

146

AN:

246572

AF XY:

0.000551

show subpopulations

Gnomad AFR exome

AF:

0.000265

Gnomad AMR exome

AF:

0.000348

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00111

Gnomad OTH exome

AF:

0.00115

GnomAD4 exome

AF:

0.000968

AC:

1414

AN:

1460670

Hom.:

Cov.:

AF XY:

0.000917

AC XY:

666

AN XY:

726656

show subpopulations

African (AFR)

AF:

0.000179

AC:

AN:

33474

American (AMR)

AF:

0.000313

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86252

European-Finnish (FIN)

AF:

0.0000382

AC:

AN:

52308

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5688

European-Non Finnish (NFE)

AF:

0.00119

AC:

1325

AN:

1112006

Other (OTH)

AF:

0.00111

AC:

AN:

60382

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.482

Heterozygous variant carriers

165

248

330

413

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

104

156

208

260

<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:

0.000709

AC:

108

AN:

152328

Hom.:

Cov.:

AF XY:

0.000604

AC XY:

AN XY:

74478

show subpopulations

African (AFR)

AF:

0.000192

AC:

AN:

41564

American (AMR)

AF:

0.000392

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00138

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.000981

Hom.:

Bravo

AF:

0.000733

TwinsUK

AF:

0.00162

AC:

ALSPAC

AF:

0.00182

AC:

ESP6500AA

AF:

0.000662

AC:

ESP6500EA

AF:

0.000739

AC:

ExAC

AF:

0.000561

AC:

EpiCase

AF:

0.00115

EpiControl

AF:

0.000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Proteasome-associated autoinflammatory syndrome 1

Uncertain:3

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 29, 2021

Revvity Omics, Revvity

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Autoinflammatory syndrome

Uncertain:1

Aug 21, 2020

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Proteosome-associated autoinflammatory syndrome

Benign:1

Jan 22, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.084

BayesDel_addAF

Benign

-0.41

BayesDel_noAF

Benign

-0.37

CADD

Uncertain

(source)

DANN

Benign

0.95

DEOGEN2

Benign

0.041

T;T;.

Eigen

Benign

-0.20

Eigen_PC

Benign

-0.089

FATHMM_MKL

Uncertain

0.93

M_CAP

Benign

0.012

MetaRNN

Benign

0.069

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.1

.;M;.

PhyloP100

5.5

PrimateAI

Benign

0.36

PROVEAN

Pathogenic

-4.8

D;D;D

REVEL

Benign

0.088

Sift

Uncertain

0.0030

D;D;D

Sift4G

Uncertain

0.0040

D;D;D

Polyphen

0.018, 0.11

.;B;B

Vest4

0.45

MVP

0.57

MPC

0.74

ClinPred

0.078

GERP RS

4.8

Varity_R

0.47

gMVP

0.84

Mutation Taster

=94/6

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over