chr17-67344782-T-C

Variant names:

• chr17-67344782-T-C
• rs1114167444
• NM_002816.5:c.909-2A>G

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_002816.5(PSMD12):​c.909-2A>G variant causes a splice acceptor, intron change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: PSMD12 NM_002816.5 splice_acceptor, intron
• Scores: Splicing: ADA: 0.9999
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.59
• Publications: 1 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: Pathogenic. The variant received 11 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease, Cryptic splice site detected, with MaxEntScore 4.4, offset of 13, new splice context is: ttttcggggatcttttaaAGctt. Cryptic site results in frameshift change. If cryptic site found is not functional and variant results in exon loss, it results in frameshift change.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 17-67344782-T-C is Pathogenic according to our data. Variant chr17-67344782-T-C is described in ClinVar as Pathogenic. ClinVar VariationId is 427782.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002816.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PSMD12	NM_002816.5	MANE Select	c.909-2A>G		splice_acceptor intron	N/A	NP_002807.1
	PSMD12	NM_174871.4		c.849-2A>G		splice_acceptor intron	N/A	NP_777360.1
	PSMD12	NM_001316341.2		c.732-2A>G		splice_acceptor intron	N/A	NP_001303270.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PSMD12	ENST00000356126.8	TSL:1 MANE Select	c.909-2A>G		splice_acceptor intron	N/A	ENSP00000348442.3
	PSMD12	ENST00000584008.5	TSL:1	n.*1064-2A>G		splice_acceptor intron	N/A	ENSP00000462525.1
	PSMD12	ENST00000357146.4	TSL:2	c.849-2A>G		splice_acceptor intron	N/A	ENSP00000349667.4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1420938 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 704866

African (AFR) AF: 0.00 AC: 0 AN: 32402

American (AMR) AF: 0.00 AC: 0 AN: 40578

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24840

East Asian (EAS) AF: 0.00 AC: 0 AN: 39286

South Asian (SAS) AF: 0.00 AC: 0 AN: 80350

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52114

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5604

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1087316

Other (OTH) AF: 0.00 AC: 0 AN: 58448

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Stankiewicz-Isidor syndrome Pathogenic:1

Jun 08, 2017

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.28
CADD	Pathogenic	34
DANN	Uncertain	1.0
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.96
FATHMM_MKL	Pathogenic	1.0	D
PhyloP100		7.6
GERP RS		5.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Mutation Taster		=0/100	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.89
SpliceAI score (max)		0.98		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.74		Position offset: -15
DS_AL_spliceai		0.98		Position offset: -2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1114167444; hg19: chr17-65340898;