6-32856171-G-C

Variant summary

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

The NM_002800.5(PSMB9):c.94G>C(p.Val32Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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. V32I) has been classified as Benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: PSMB9 NM_002800.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.07

Genes affected

PSMB9 (HGNC:9546): (proteasome 20S subunit beta 9) 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 1 (proteasome beta 6 subunit) in the immunoproteasome. Proteolytic processing is required to generate a mature subunit. [provided by RefSeq, Mar 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PSMB9	NM_002800.5	c.94G>C	p.Val32Leu	missense_variant	2/6	ENST00000374859.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PSMB9	ENST00000374859.3	c.94G>C	p.Val32Leu	missense_variant	2/6	1	NM_002800.5	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 31

Bravo AF: 0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.80
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.020
Cadd	Uncertain	24
Dann	Uncertain	1.0
DEOGEN2	Benign	0.13	T;T;T
Eigen	Uncertain	0.57
Eigen_PC	Uncertain	0.46
FATHMM_MKL	Uncertain	0.96	D
M_CAP	Benign	0.070	D
MetaRNN	Uncertain	0.73	D;D;D
MetaSVM	Benign	-0.31	T
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.55	T
PROVEAN	Uncertain	-2.6	D;D;D
REVEL	Uncertain	0.32
Sift	Uncertain	0.012	D;D;D
Sift4G	Uncertain	0.021	D;D;D
Polyphen		0.99	.;.;D
Vest4		0.56
MutPred		0.50		.;.;Loss of disorder (P = 0.2057);
MVP		0.73
MPC		0.78
ClinPred		0.98	D
GERP RS		5.4
Varity_R		0.68
gMVP		0.80

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

Other links and lift over

dbSNP: rs241419; hg19: chr6-32823948;