chr2-208277664-G-A
Variant summary
Our verdict is Likely benign. Variant got -4 ACMG points: 1P and 5B. PP2BS1_SupportingBS2
The NM_015040.4(PIKFYVE):c.569G>A(p.Arg190His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000248 in 1,613,856 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: 𝑓 0.000085 ( 0 hom., cov: 32)
Exomes 𝑓: 0.000018 ( 0 hom. )
Consequence
PIKFYVE
NM_015040.4 missense
NM_015040.4 missense
Scores
5
8
6
Clinical Significance
Conservation
PhyloP100: 9.93
Genes affected
PIKFYVE (HGNC:23785): (phosphoinositide kinase, FYVE-type zinc finger containing) Phosphorylated derivatives of phosphatidylinositol (PtdIns) regulate cytoskeletal functions, membrane trafficking, and receptor signaling by recruiting protein complexes to cell- and endosomal-membranes. Humans have multiple PtdIns proteins that differ by the degree and position of phosphorylation of the inositol ring. This gene encodes an enzyme (PIKfyve; also known as phosphatidylinositol-3-phosphate 5-kinase type III or PIPKIII) that phosphorylates the D-5 position in PtdIns and phosphatidylinositol-3-phosphate (PtdIns3P) to make PtdIns5P and PtdIns(3,5)biphosphate. The D-5 position also can be phosphorylated by type I PtdIns4P-5-kinases (PIP5Ks) that are encoded by distinct genes and preferentially phosphorylate D-4 phosphorylated PtdIns. In contrast, PIKfyve preferentially phosphorylates D-3 phosphorylated PtdIns. In addition to being a lipid kinase, PIKfyve also has protein kinase activity. PIKfyve regulates endomembrane homeostasis and plays a role in the biogenesis of endosome carrier vesicles from early endosomes. The protein plays a key role in cell entry of ebola virus and SARS-CoV-2 by endocytosis Mutations in this gene cause corneal fleck dystrophy (CFD); an autosomal dominant disorder characterized by numerous small white flecks present in all layers of the corneal stroma. Histologically, these flecks appear to be keratocytes distended with lipid and mucopolysaccharide filled intracytoplasmic vacuoles. [provided by RefSeq, Jul 2021]
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ACMG classification
Classification made for transcript
Verdict is Likely_benign. Variant got -4 ACMG points.
PP2
?
Missense variant where missense usually causes diseases, PIKFYVE
BS1
?
Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.0000854 (13/152272) while in subpopulation AMR AF= 0.000458 (7/15286). AF 95% confidence interval is 0.000215. There are 0 homozygotes in gnomad4. There are 9 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
BS2
?
High AC in GnomAd at 13 AD gene.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
PIKFYVE | NM_015040.4 | c.569G>A | p.Arg190His | missense_variant | 5/42 | ENST00000264380.9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
PIKFYVE | ENST00000264380.9 | c.569G>A | p.Arg190His | missense_variant | 5/42 | 1 | NM_015040.4 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.0000854 AC: 13AN: 152154Hom.: 0 Cov.: 32
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GnomAD3 exomes AF: 0.0000398 AC: 10AN: 251108Hom.: 0 AF XY: 0.0000368 AC XY: 5AN XY: 135720
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GnomAD4 exome AF: 0.0000185 AC: 27AN: 1461584Hom.: 0 Cov.: 31 AF XY: 0.0000138 AC XY: 10AN XY: 727096
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GnomAD4 genome ? AF: 0.0000854 AC: 13AN: 152272Hom.: 0 Cov.: 32 AF XY: 0.000121 AC XY: 9AN XY: 74458
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Inborn genetic diseases Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | May 27, 2022 | The c.569G>A (p.R190H) alteration is located in exon 5 (coding exon 4) of the PIKFYVE gene. This alteration results from a G to A substitution at nucleotide position 569, causing the arginine (R) at amino acid position 190 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
Cadd
Pathogenic
Dann
Pathogenic
DEOGEN2
Benign
T;.;T;T
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Pathogenic
D
LIST_S2
Pathogenic
D;D;D;D
M_CAP
Benign
T
MetaRNN
Uncertain
D;D;D;D
MetaSVM
Benign
T
MutationAssessor
Uncertain
M;M;.;.
MutationTaster
Benign
D;D;D;D
PrimateAI
Pathogenic
D
PROVEAN
Uncertain
D;D;D;D
REVEL
Uncertain
Sift
Uncertain
D;D;D;D
Sift4G
Uncertain
D;D;D;D
Polyphen
D;.;.;P
Vest4
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at