14-23033400-G-A

Variant names:

• chr14-23033400-G-A
• NM_002797.5:c.473C>T

Variant summary

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

The NM_002797.5(PSMB5):​c.473C>T​(p.Thr158Ile) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 30)
• Consequence: PSMB5 NM_002797.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.08

Genes affected

PSMB5 (HGNC:9542): (proteasome 20S subunit beta 5) 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 in the proteasome. This catalytic subunit is not present in the immunoproteasome and is replaced by catalytic subunit 3i (proteasome beta 8 subunit). Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2009]

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 rank	MANE	Protein	UniProt
PSMB5	NM_002797.5	c.473C>T	p.Thr158Ile	missense_variant	Exon 2 of 3	ENST00000361611.11	NP_002788.1
PSMB5	NM_001144932.3	c.473C>T	p.Thr158Ile	missense_variant	Exon 2 of 4		NP_001138404.1
PSMB5	NM_001130725.1	c.164C>T	p.Thr55Ile	missense_variant	Exon 2 of 3		NP_001124197.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PSMB5	ENST00000361611.11	c.473C>T	p.Thr158Ile	missense_variant	Exon 2 of 3	1	NM_002797.5	ENSP00000355325.6

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 30

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jan 16, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.473C>T (p.T158I) alteration is located in exon 2 (coding exon 2) of the PSMB5 gene. This alteration results from a C to T substitution at nucleotide position 473, causing the threonine (T) at amino acid position 158 to be replaced by an isoleucine (I). 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	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.21	D
BayesDel_noAF	Uncertain	0.060
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.20	T;.;.
Eigen	Uncertain	0.61
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Uncertain	0.94	D;D;D
M_CAP	Benign	0.026	D
MetaRNN	Uncertain	0.56	D;D;D
MetaSVM	Benign	-0.97	T
MutationAssessor	Benign	2.0	M;M;.
PrimateAI	Uncertain	0.77	T
PROVEAN	Pathogenic	-5.2	D;D;D
REVEL	Benign	0.27
Sift	Uncertain	0.0010	D;D;D
Sift4G	Benign	0.078	T;D;T
Polyphen		0.94	P;D;.
Vest4		0.62
MutPred		0.53		Gain of catalytic residue at S155 (P = 0);Gain of catalytic residue at S155 (P = 0);.;
MVP		0.73
MPC		1.6
ClinPred		1.0	D
GERP RS		4.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.85
gMVP		0.89

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr14-23502609;