2-218341535-G-C

Variant names:

• chr2-218341535-G-C
• rs1553674143
• NM_015488.5:c.526G>C

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_015488.5(PNKD):​c.526G>C​(p.Asp176His) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.000000693 in 1,442,262 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. 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. D176E) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: PNKD NM_015488.5 missense, splice_region
• Scores: Splicing: ADA: 0.6675
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.99
• Publications: 0 publications found

Genes affected

PNKD (HGNC:9153): (PNKD metallo-beta-lactamase domain containing) This gene is thought to play a role in the regulation of myofibrillogenesis. Mutations in this gene have been associated with the movement disorder paroxysmal non-kinesigenic dyskinesia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2010]

CATIP-AS2 (HGNC:41079): (CATIP antisense RNA 2)

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.99

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PNKD	NM_015488.5	c.526G>C	p.Asp176His	missense_variant, splice_region_variant	Exon 6 of 10	ENST00000273077.9	NP_056303.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PNKD	ENST00000273077.9	c.526G>C	p.Asp176His	missense_variant, splice_region_variant	Exon 6 of 10	1	NM_015488.5	ENSP00000273077.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.93e-7 AC: 1 AN: 1442262 Hom.: 0 Cov.: 31 AF XY: 0.00000140 AC XY: 1 AN XY: 715498

African (AFR) AF: 0.00 AC: 0 AN: 33020

American (AMR) AF: 0.00 AC: 0 AN: 43150

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25718

East Asian (EAS) AF: 0.00 AC: 0 AN: 38664

South Asian (SAS) AF: 0.00 AC: 0 AN: 83104

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51686

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5192

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1102248

Other (OTH) AF: 0.0000168 AC: 1 AN: 59480

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.57	D
BayesDel_noAF	Pathogenic	0.58
CADD	Pathogenic	33
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.91	D;.;.
Eigen	Pathogenic	0.89
Eigen_PC	Pathogenic	0.75
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.95	D;D;D
M_CAP	Pathogenic	0.81	D
MetaRNN	Pathogenic	0.99	D;D;D
MetaSVM	Pathogenic	0.98	D
MutationAssessor	Pathogenic	4.7	H;.;.
PhyloP100		7.0
PrimateAI	Pathogenic	0.86	D
PROVEAN	Pathogenic	-6.7	D;D;D
REVEL	Pathogenic	0.97
Sift	Pathogenic	0.0	D;D;D
Sift4G	Uncertain	0.0020	D;D;D
Polyphen		0.99	D;D;.
Vest4		0.97
MutPred		0.93		Gain of MoRF binding (P = 0.0476);.;.;
MVP		0.88
MPC		0.66
ClinPred		1.0	D
GERP RS		4.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.97
gMVP		0.97
Mutation Taster		=16/84	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.67
dbscSNV1_RF	Pathogenic	0.73
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: rs1553674143; hg19: chr2-219206258;