chr19-49862702-T-A

Variant names:

• chr19-49862702-T-A
• rs750224965
• NM_007254.4:c.853A>T
• PNKP p.Ile285Phe

GermlineCancer (beta)

Variant summary

Our verdict is Uncertain significance.

+1 Uncertain · Cold

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received 1 classification points (ACGS-UK Somatic Oncogenicity v2025). O3_ModerateB3_Supporting

The NM_007254.4(PNKP):c.853A>T (p.Ile285Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant is absent from the gnomAD population database at sites with sufficient sequencing coverage. In-silico predictor (REVEL) classifies this variant as likely benign. Splicing prediction tools (SpliceAI) predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain Significance (★). Other variants at the same amino acid position have been reported in ClinVar (not pathogenic): p.I285M: Uncertain_significance (ClinVar VariationId 1763848, 1 star); p.I285V: Uncertain_significance (ClinVar VariationId 199124, 2 stars)

• Frequency: Genomes: not found (cov: 33)
• Consequence: PNKP NM_007254.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -2.03
• Publications: 0 publications found

Genes affected

PNKP (HGNC:9154): (polynucleotide kinase 3'-phosphatase) This locus represents a gene involved in DNA repair. In response to ionizing radiation or oxidative damage, the protein encoded by this locus catalyzes 5' phosphorylation and 3' dephosphorylation of nucleic acids. Mutations at this locus have been associated with microcephaly, seizures, and developmental delay.[provided by RefSeq, Sep 2010]

PNKP Gene-Disease associations (from GenCC):

• ataxia - oculomotor apraxia type 4

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Laboratory for Molecular Medicine, Orphanet, G2P, PanelApp Australia
• microcephaly, seizures, and developmental delay

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen
• Charcot-Marie-Tooth disease type 2B2

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: PanelApp Australia, Orphanet, Labcorp Genetics (formerly Invitae)
• genetic developmental and epileptic encephalopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

Classification according to ACGS-UK Somatic Oncogenicity v2025

Classification was made for transcript:

Our verdict: Uncertain_significance. The variant received 1 points.

Apply	Criterion Code & Title / Strength	Strength	Rationale / Clinical Context
	O3Absent or very rare in population		Absent or extremely rare in gnomAD (AC ≤ 2) — O3 moderate; GnomAD: AF = absent, AC = 0 — absent/extremely rare (O3 moderate [+2])
	B3Computational evidence does not support deleterious effect		Computational evidence does not support a deleterious effect; Missense variant — primary computational scorer does not support an oncogenic/deleterious effect; supports B3

Variant Effect in Transcripts

Automated classification analysis was done for transcript: NM_007254.4. You can select a different transcript below to see updated classification assignments.

RefSeq Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	PNKP NM_007254.4	MANE Select	c.853A>T p.Ile285Phe	missense	Exon 9 of 17	Prot: NP_009185.2

PNKP NM_007254.4

MANE Select

HGVSc / HGVSpc.853A>Tp.Ile285Phe

Exon rankExon 9 of 17

missense

Prot: NP_009185.2

Ensembl Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	PNKP ENST00000322344.8	TSL:1MANE Select	c.853A>T p.Ile285Phe	missense	Exon 9 of 17	Prot: ENSP00000323511.2 UniProt:
	PNKP ENST00000596014.5	TSL:1	c.853A>T p.Ile285Phe	missense	Exon 8 of 16	Prot: ENSP00000472300.1 UniProt:
	PNKP ENST00000593946.5	TSL:1	n.*780A>T	3_prime_UTR	Exon 8 of 16	Prot: ENSP00000468896.1 UniProt:

PNKP ENST00000322344.8

TSL:1MANE Select

HGVSc / HGVSpc.853A>Tp.Ile285Phe

Exon rankExon 9 of 17

missense

Prot: ENSP00000323511.2UniProt: Q96T60-1

PNKP ENST00000596014.5

TSL:1

HGVSc / HGVSpc.853A>Tp.Ile285Phe

Exon rankExon 8 of 16

missense

Prot: ENSP00000472300.1UniProt: Q96T60-1

PNKP ENST00000593946.5

TSL:1

HGVSc / HGVSpn.*780A>T

Exon rankExon 8 of 16

3_prime_UTR

Prot: ENSP00000468896.1UniProt: M0QX49

Frequencies

Allele frequencies (AF), counts (AC/AN), homozygotes and coverage

Common (AF > 0.05 / Hom > 5)

Rare (AF ≤ 0.0001 / Hom ≤ 1)

Source / population	AF	AC	Hom	AN	Coverage
Global population databases 3 sources Large-scale international reference populations
GnomAD3 genomes	AF:	AC:	Hom:	AN:	Cov:33
GnomAD4 exome	AF:	AC:	Hom:	AN:	Cov:35
GnomAD4 genome	AF:	AC:	Hom:	AN:	Cov:33

Showing 3 sources

Case/control cohorts

Cohort	Cases			Controls
	AF	AC	AN	AF	AC	AN
SCHEMA(Schizophrenia)	0.0000621	3	48330	0.0000269	2	74318

Showing 1 cohortAllele count / allele number. AF is computed from the counts for ASC (not provided by the source).

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Developmental and epileptic encephalopathy, 12 (1)

Computational Scores

Algorithm	Calibrated pred.	Score	Prediction
AlphaGenome AVI	Benign	1.5
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.63
CADD	Benign	0.099
DANN	Benign	0.75
DEOGEN2	Benign	0.043	T
Eigen	Benign	-1.9
Eigen_PC	Benign	-1.9
FATHMM_MKL	Benign	0.041	N
FuncVEP CTI	Benign	0.017
GPN-Star LLR	N/A	-3.2
GPN-Star score	N/A	3.2
LIST_S2	Uncertain	0.86	D
M_CAP	Benign	0.021	T
MetaRNN	Benign	0.062	T
MetaSVM	Benign	-0.94	T
Mutation Taster	N/A	75/25	polymorphism
MutationAssessor	Benign	-0.84	N
PhyloP100	Benign	-2.0
popEVE	Benign	-2.4
PrimateAI	Benign	0.40	T
PROVEAN	Benign	3.3	N
RBP_binding_hub_radar	N/A	0.0
RBP_regulation_power_radar	N/A	1.1
REVEL	Benign	0.095
Sift	Benign	1.0	T
Sift4G	Benign	0.68	T
Varity_R	N/A	0.033
VESM-3B	Benign	-6.9

Showing 30 of 30 scores

Splicing Scores

Algorithm	Calibrated pred.	Score	Prediction
Pangolin (max)	Benign	0.040
SpliceAI score (max)	Benign	0.0	Details are displayed if max score is > 0.2

Showing 2 of 2 scores

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

MaveDB functional evidence

MaveDB is a public repository of laboratory assays that test the effect of thousands of variants at once — treat this as supporting research data and interpret it with great caution; it is not a clinical classification.

No MaveDB functional evidence found for this variant.

Other links and lift over

dbSNP: rs750224965;

hg19: chr19-50365959;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar