chr17-67350267-G-C

Variant names:

• chr17-67350267-G-C
• rs1114167442
• NM_002816.5:c.367C>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_002816.5(PSMD12):​c.367C>G​(p.Arg123Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,460,586 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. R123Q) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: PSMD12 NM_002816.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.91
• Publications: 2 publications found

Genes affected

PSMD12 (HGNC:9557): (proteasome 26S subunit, non-ATPase 12) 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 non-ATPase subunit of the 19S regulator. A pseudogene has been identified on chromosome 3. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2015]

PSMD12 Gene-Disease associations (from GenCC):

• Stankiewicz-Isidor syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae)
• syndromic intellectual disability

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 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
PSMD12	NM_002816.5	c.367C>G	p.Arg123Gly	missense_variant	Exon 4 of 11	ENST00000356126.8	NP_002807.1
PSMD12	NM_174871.4	c.307C>G	p.Arg103Gly	missense_variant	Exon 3 of 10		NP_777360.1
PSMD12	NM_001316341.2	c.190C>G	p.Arg64Gly	missense_variant	Exon 6 of 13		NP_001303270.1
PSMD12	XM_047436440.1	c.367C>G	p.Arg123Gly	missense_variant	Exon 4 of 9		XP_047292396.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PSMD12	ENST00000356126.8	c.367C>G	p.Arg123Gly	missense_variant	Exon 4 of 11	1	NM_002816.5	ENSP00000348442.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000799 AC: 2 AN: 250380 AF XY: 0.0000148

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS 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: 0.00000205 AC: 3 AN: 1460586 Hom.: 0 Cov.: 30 AF XY: 0.00000413 AC XY: 3 AN XY: 726600

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33428

American (AMR) AF: 0.00 AC: 0 AN: 44528

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26118

East Asian (EAS) AF: 0.00 AC: 0 AN: 39614

South Asian (SAS) AF: 0.0000233 AC: 2 AN: 86010

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53376

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5742

European-Non Finnish (NFE) AF: 9.00e-7 AC: 1 AN: 1111444

Other (OTH) AF: 0.00 AC: 0 AN: 60326

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.004005), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.28
BayesDel_addAF	Benign	-0.10	T
BayesDel_noAF	Benign	-0.20
CADD	Benign	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.31	T;.
Eigen	Benign	-0.19
Eigen_PC	Benign	-0.046
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.97	D;D
M_CAP	Benign	0.018	T
MetaRNN	Uncertain	0.52	D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.5	L;.
PhyloP100		2.9
PrimateAI	Uncertain	0.68	T
PROVEAN	Uncertain	-3.1	D;D
REVEL	Benign	0.15
Sift	Uncertain	0.017	D;D
Sift4G	Uncertain	0.042	D;D
Polyphen		0.049	B;.
Vest4		0.68
MutPred		0.50		Loss of stability (P = 0.0303);.;
MVP		0.45
MPC		0.92
ClinPred		0.85	D
GERP RS		3.9
Varity_R		0.41
gMVP		0.73

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

Other links and lift over

dbSNP: rs1114167442; hg19: chr17-65346383;