20-1135222-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_006814.5(PSMF1):c.467G>A(p.Arg156Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000052 in 1,614,076 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 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. R156W) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000092 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000048 (0 hom.)
• Consequence: PSMF1 NM_006814.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.128

Genes affected

PSMF1 (HGNC:9571): (proteasome inhibitor subunit 1) The 26S proteasome is a multicatalytic proteinase complex with a highly ordered structure composed of 2 complexes, a 20S core and a 19S regulator. The 20S core 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. The 19S regulator is composed of a base, which contains 6 ATPase subunits and 2 non-ATPase subunits, and a lid, which contains up to 10 non-ATPase 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 protein that inhibits the activation of the proteasome by the 11S and 19S regulators. Alternative transcript variants have been identified for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.02421385).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PSMF1	NM_006814.5	c.467G>A	p.Arg156Gln	missense_variant	4/7	ENST00000335877.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PSMF1	ENST00000335877.11	c.467G>A	p.Arg156Gln	missense_variant	4/7	1	NM_006814.5	P1

Frequencies

GnomAD3 genomes AF: 0.0000986 AC: 15 AN: 152088 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000483

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00154

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000131 AC: 33 AN: 251402 Hom.: 0 AF XY: 0.000132 AC XY: 18 AN XY: 135876

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00130

Gnomad SAS exome AF: 0.000131

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000264

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.0000479 AC: 70 AN: 1461870 Hom.: 0 Cov.: 31 AF XY: 0.0000454 AC XY: 33 AN XY: 727238

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00111

Gnomad4 SAS exome AF: 0.0000580

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000144

Gnomad4 OTH exome AF: 0.0000662

GnomAD4 genome AF: 0.0000920 AC: 14 AN: 152206 Hom.: 0 Cov.: 32 AF XY: 0.000121 AC XY: 9 AN XY: 74436

Gnomad4 AFR AF: 0.0000482

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00135

Gnomad4 SAS AF: 0.000208

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000588

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000175 Hom.: 0

Bravo AF: 0.000117

ExAC AF: 0.000132 AC: 16

Asia WGS AF: 0.000577 AC: 2 AN: 3478

EpiCase AF: 0.000109

EpiControl AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 05, 2022

The c.467G>A (p.R156Q) alteration is located in exon 4 (coding exon 4) of the PSMF1 gene. This alteration results from a G to A substitution at nucleotide position 467, causing the arginine (R) at amino acid position 156 to be replaced by a glutamine (Q). 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	0.079
BayesDel_addAF	Benign	-0.49	T
BayesDel_noAF	Benign	-0.51
Cadd	Benign	12
Dann	Uncertain	1.0
DEOGEN2	Benign	0.0053	T;T;T;T
Eigen	Benign	-0.23
Eigen_PC	Benign	-0.25
FATHMM_MKL	Benign	0.34	N
LIST_S2	Benign	0.77	T;T;T;.
M_CAP	Benign	0.0074	T
MetaRNN	Benign	0.024	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	2.0	M;.;.;M
MutationTaster	Benign	1.0	N;N;N;N;N
PrimateAI	Benign	0.25	T
PROVEAN	Benign	-1.1	N;N;N;N
REVEL	Benign	0.039
Sift	Uncertain	0.024	D;D;D;D
Sift4G	Benign	0.14	T;T;T;T
Polyphen		0.34	B;.;P;B
Vest4		0.088
MVP		0.33
MPC		0.085
ClinPred		0.047	T
GERP RS		2.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.041
gMVP		0.40

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: rs200994349; hg19: chr20-1115865; COSMIC: COSV55675109; COSMIC: COSV55675109;