9-83971681-G-GT

Variant names:

• chr9-83971681-G-GT
• rs1554698681
• NM_031263.4:c.998dupA

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_031263.4(HNRNPK):​c.998dupA​(p.Tyr333fs) variant causes a frameshift, stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: HNRNPK NM_031263.4 frameshift, stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:3 O:1
• Conservation: PhyloP100: 3.27
• Publications: 2 publications found

Genes affected

HNRNPK (HGNC:5044): (heterogeneous nuclear ribonucleoprotein K) This gene belongs to the subfamily of ubiquitously expressed heterogeneous nuclear ribonucleoproteins (hnRNPs). The hnRNPs are RNA binding proteins and they complex with heterogeneous nuclear RNA (hnRNA). These proteins are associated with pre-mRNAs in the nucleus and appear to influence pre-mRNA processing and other aspects of mRNA metabolism and transport. While all of the hnRNPs are present in the nucleus, some seem to shuttle between the nucleus and the cytoplasm. The hnRNP proteins have distinct nucleic acid binding properties. The protein encoded by this gene is located in the nucleoplasm and has three repeats of KH domains that binds to RNAs. It is distinct among other hnRNP proteins in its binding preference; it binds tenaciously to poly(C). This protein is also thought to have a role during cell cycle progession. Several alternatively spliced transcript variants have been described for this gene, however, not all of them are fully characterized. [provided by RefSeq, Jul 2008]

HNRNPK-AS1 (HGNC:56061): (HNRNPK antisense RNA 1)

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
• PP5: Variant 9-83971681-G-GT is Pathogenic according to our data. Variant chr9-83971681-G-GT is described in ClinVar as Pathogenic. ClinVar VariationId is 503601.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_031263.4. 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
	HNRNPK	NM_031263.4	MANE Select	c.998dupA	p.Tyr333fs	frameshift stop_gained	Exon 12 of 17	NP_112553.1
	HNRNPK	NM_002140.5		c.998dupA	p.Tyr333fs	frameshift stop_gained	Exon 12 of 17	NP_002131.2
	HNRNPK	NM_001318188.2		c.998dupA	p.Tyr333fs	frameshift stop_gained	Exon 12 of 17	NP_001305117.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HNRNPK	ENST00000376263.8	TSL:1 MANE Select	c.998dupA	p.Tyr333fs	frameshift stop_gained	Exon 12 of 17	ENSP00000365439.3
	HNRNPK	ENST00000376281.8	TSL:1	c.998dupA	p.Tyr333fs	frameshift stop_gained	Exon 12 of 17	ENSP00000365458.4
	HNRNPK	ENST00000360384.9	TSL:1	c.998dupA	p.Tyr333fs	frameshift stop_gained	Exon 12 of 17	ENSP00000353552.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Au-Kline syndrome Pathogenic:3 Other:1

Nov 04, 2025

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Jan 07, 2018

Clinical Genetics Research Group, University of Calgary

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

GeneReviews

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

Nov 14, 2017

Institute for Genomic Medicine (IGM) Clinical Laboratory, Nationwide Children's Hospital

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

[ACMG/AMP: PVS1, PS2, PM2, PP5] This alteration is a null variant in a gene where LOF is a known mechanism of disease [PVS1], is de novo in origin as it was not detected in the submitted parental specimens (identity confirmed) [PS2], is absent from or rarely observed in large-scale population databases [PM2], was reported as a pathogenic/likely pathogenic alteration by a reputable source (ClinVar or other correspondence from a clinical testing laboratory) [PP5].

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		3.3
Mutation Taster		=1/199	disease causing (ClinVar)

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: rs1554698681; hg19: chr9-86586596; COSMIC: COSV109433930; COSMIC: COSV109433930;