20-1125499-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_006814.5(PSMF1):c.131C>G(p.Pro44Arg) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.0000118 in 1,604,578 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. P44P) has been classified as Benign.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000012 (0 hom.)
• Consequence: PSMF1 NM_006814.5 missense, splice_region
• Scores: Splicing: ADA: 0.7879
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.41

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 Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2363798).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PSMF1	NM_006814.5	c.131C>G	p.Pro44Arg	missense_variant, splice_region_variant	2/7	ENST00000335877.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PSMF1	ENST00000335877.11	c.131C>G	p.Pro44Arg	missense_variant, splice_region_variant	2/7	1	NM_006814.5	P1

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 152088 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.00000412 AC: 1 AN: 242762 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 131178

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000302

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: 0.0000124 AC: 18 AN: 1452490 Hom.: 0 Cov.: 30 AF XY: 0.0000152 AC XY: 11 AN XY: 722414

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000463

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000144

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 152088 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74306

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

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

Bravo AF: 0.00000378

ExAC AF: 0.00000824 AC: 1

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

Feb 16, 2023

The c.131C>G (p.P44R) alteration is located in exon 2 (coding exon 2) of the PSMF1 gene. This alteration results from a C to G substitution at nucleotide position 131, causing the proline (P) at amino acid position 44 to be replaced by an arginine (R). 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	0.12
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.36
Cadd	Pathogenic	26
Dann	Uncertain	1.0
DEOGEN2	Benign	0.0081	T;T;T;T
Eigen	Uncertain	0.43
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.80	T;T;T;.
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.24	T;T;T;T
MetaSVM	Benign	-0.91	T
MutationAssessor	Uncertain	2.2	M;.;.;M
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Benign	0.37	T
PROVEAN	Uncertain	-2.5	N;N;N;N
REVEL	Benign	0.11
Sift	Uncertain	0.021	D;D;D;D
Sift4G	Benign	0.43	T;D;T;T
Polyphen		0.98	D;.;D;D
Vest4		0.51
MutPred		0.27		Gain of solvent accessibility (P = 0.0216);Gain of solvent accessibility (P = 0.0216);Gain of solvent accessibility (P = 0.0216);Gain of solvent accessibility (P = 0.0216);
MVP		0.58
MPC		0.086
ClinPred		0.84	D
GERP RS		4.9
Varity_R		0.25
gMVP		0.47

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.79
dbscSNV1_RF	Benign	0.66
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: rs372603862; hg19: chr20-1106142;