19-11448917-C-G

Variant names:

• chr19-11448917-C-G
• rs121918520
• NM_001289104.2:c.1290C>G

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 19P and 1B. PVS1 PM2 PP3 PP5_Very_Strong BS2_Supporting

The NM_001289104.2(PRKCSH):​c.1290C>G​(p.Tyr430*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,834 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. Y430Y) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: PRKCSH NM_001289104.2 stop_gained
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:5
• Conservation: PhyloP100: -1.05
• Publications: 5 publications found

Genes affected

PRKCSH (HGNC:9411): (PRKCSH beta subunit of glucosidase II) This gene encodes the beta-subunit of glucosidase II, an N-linked glycan-processing enzyme in the endoplasmic reticulum. The encoded protein is an acidic phosphoprotein known to be a substrate for protein kinase C. Mutations in this gene have been associated with the autosomal dominant polycystic liver disease. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2014]

PRKCSH Gene-Disease associations (from GenCC):

• polycystic liver disease 1

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, Ambry Genetics, Orphanet, Genomics England PanelApp

ACMG classification

Our verdict: Pathogenic. The variant received 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
• PP5: Variant 19-11448917-C-G is Pathogenic according to our data. Variant chr19-11448917-C-G is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 13242.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS2: High AC in GnomAdExome4 at 5 AD gene. Variant has AC lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001289104.2. 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
	PRKCSH	NM_001289104.2	MANE Select	c.1290C>G	p.Tyr430*	stop_gained	Exon 15 of 18	NP_001276033.1
	PRKCSH	NM_001289103.2		c.1290C>G	p.Tyr430*	stop_gained	Exon 15 of 18	NP_001276032.1
	PRKCSH	NM_001379608.1		c.1269C>G	p.Tyr423*	stop_gained	Exon 15 of 18	NP_001366537.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRKCSH	ENST00000677123.1	MANE Select	c.1290C>G	p.Tyr430*	stop_gained	Exon 15 of 18	ENSP00000503163.1
	PRKCSH	ENST00000592741.5	TSL:1	c.1290C>G	p.Tyr430*	stop_gained	Exon 15 of 18	ENSP00000466134.1
	PRKCSH	ENST00000589838.5	TSL:1	c.1269C>G	p.Tyr423*	stop_gained	Exon 14 of 17	ENSP00000465461.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000119 AC: 3 AN: 251410 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000578

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000879

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461834 Hom.: 0 Cov.: 32 AF XY: 0.00000275 AC XY: 2 AN XY: 727218

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.0000447 AC: 2 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53372

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1112004

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ExAC AF: 0.00000824 AC: 1

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Polycystic liver disease 1 Pathogenic:4

Jun 28, 2025

Immunogenetics and Transplant Biology Service, University Hospital "Città della Salute e della Scienza di Torino"

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Mar 01, 2003

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Aug 03, 2021

Fulgent Genetics, Fulgent Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Genomics And Bioinformatics Analysis Resource, Columbia University

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

not provided Pathogenic:1

Jan 03, 2023

GeneDx

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; This variant is associated with the following publications: (PMID: 25525159, 33960378, 20095989, 33437033, 32457805, 25266109, 12529853)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.50	D
BayesDel_noAF	Uncertain	0.060
CADD	Pathogenic	31
DANN	Benign	0.95
Eigen	Benign	-0.63
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.27	N
PhyloP100		-1.0
Vest4		0.79
GERP RS		-7.3
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
Splicevardb		2.0
SpliceAI score (max)		0.79		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.79		Position offset: 1

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

Other links and lift over

dbSNP: rs121918520; hg19: chr19-11559732;