17-38753279-A-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_002795.4(PSMB3):c.133A>T(p.Met45Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000254 in 1,614,088 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000023 ( 0 hom. )

Consequence

PSMB3
NM_002795.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.96

Variant links:

Genes affected

PSMB3 (HGNC:9540): (proteasome 20S subunit beta 3) 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. The 26 S proteasome may be involved in trinucleotide repeat expansion, a phenomenon which is associated with many hereditary neurological diseases. Pseudogenes have been identified on chromosomes 2 and 12. Alternative splicing results in multiple transcript variants [provided by RefSeq, Sep 2013]

PSMB3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.18960065).

BS2

High AC in GnomAd4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PSMB3	NM_002795.4 link	c.133A>T	p.Met45Leu	missense_variant	Exon 2 of 6	ENST00000619426.5	NP_002786.2	P49720A0A384NL22
PSMB3	NR_104194.2 link	n.219A>T		non_coding_transcript_exon_variant	Exon 2 of 5
PSMB3	NR_104195.2 link	n.219A>T		non_coding_transcript_exon_variant	Exon 2 of 6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
PSMB3	ENST00000619426.5 link	c.133A>T	p.Met45Leu	missense_variant	Exon 2 of 6	1	NM_002795.4	ENSP00000483688.1	P49720
PSMB3	ENST00000610434.4 link	c.124A>T	p.Met42Leu	missense_variant	Exon 2 of 4	3		ENSP00000478737.1	A0A087WUL2
PSMB3	ENST00000613870.4 link	n.133A>T		non_coding_transcript_exon_variant	Exon 2 of 6	3		ENSP00000481215.1	A0A087WXQ8
PSMB3	ENST00000620309.4 link	n.133A>T		non_coding_transcript_exon_variant	Exon 2 of 5	2		ENSP00000481442.1	A0A087WY10

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152108

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251248

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135876

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS 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:

0.0000226

AC:

AN:

1461862

Hom.:

Cov.:

AF XY:

0.0000220

AC XY:

AN XY:

727236

show subpopulations

Gnomad4 AFR exome

AF:

0.000538

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000540

Gnomad4 OTH exome

AF:

0.0000993

GnomAD4 genome

AF:

0.0000526

AC:

AN:

152226

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74422

show subpopulations

Gnomad4 AFR

AF:

0.000144

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000847

Hom.:

Bravo

AF:

0.0000907

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 30, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.133A>T (p.M45L) alteration is located in exon 2 (coding exon 2) of the PSMB3 gene. This alteration results from a A to T substitution at nucleotide position 133, causing the methionine (M) at amino acid position 45 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.038

BayesDel_noAF

Uncertain

0.0

CADD

Uncertain

DANN

Benign

0.91

DEOGEN2

Benign

0.063

T;T

Eigen

Benign

0.12

Eigen_PC

Uncertain

0.30

FATHMM_MKL

Pathogenic

0.97

M_CAP

Benign

0.0065

MetaRNN

Benign

0.19

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.7

L;.

PrimateAI

Uncertain

0.72

Sift4G

Benign

0.29

T;T

Polyphen

0.0010

B;.

Vest4

0.57

MutPred

0.45

Gain of catalytic residue at M45 (P = 0.0343);.;

MVP

0.68

ClinPred

0.27

GERP RS

5.6

Varity_R

0.75

gMVP

0.75

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over