17-4170784-T-C

Variant names:

• chr17-4170784-T-C
• rs755640421
• NM_001330063.2:c.3217A>G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001330063.2(ANKFY1):​c.3217A>G​(p.Asn1073Asp) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,874 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: ANKFY1 NM_001330063.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.26

Genes affected

ANKFY1 (HGNC:20763): (ankyrin repeat and FYVE domain containing 1) This gene encodes a cytoplasmic protein that contains a coiled-coil structure and a BTB/POZ domain at its N-terminus, ankyrin repeats in the middle portion, and a FYVE-finger motif at its C-terminus. This protein belongs to a subgroup of double zinc finger proteins which may be involved in vesicle or protein transport. Alternate splicing results in multiple transcript variants of this gene. [provided by RefSeq, Apr 2012]

CYB5D2 (HGNC:28471): (cytochrome b5 domain containing 2) Predicted to enable heme binding activity. Predicted to be involved in nervous system development. Predicted to act upstream of or within positive regulation of neuron differentiation. Predicted to be located in extracellular region. Predicted to be active in endomembrane system and membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.30460513).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ANKFY1	NM_001330063.2	c.3217A>G	p.Asn1073Asp	missense_variant	Exon 23 of 25	ENST00000341657.9	NP_001316992.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ANKFY1	ENST00000341657.9	c.3217A>G	p.Asn1073Asp	missense_variant	Exon 23 of 25	5	NM_001330063.2	ENSP00000343362.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000802 AC: 2 AN: 249406 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135236

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000111

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461874 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727238

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000504

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

May 11, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.3220A>G (p.N1074D) alteration is located in exon 23 (coding exon 23) of the ANKFY1 gene. This alteration results from a A to G substitution at nucleotide position 3220, causing the asparagine (N) at amino acid position 1074 to be replaced by an aspartic acid (D). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.24
BayesDel_addAF	Benign	-0.42	T
BayesDel_noAF	Benign	-0.61
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.027	T;.;.
Eigen	Benign	-0.12
Eigen_PC	Benign	0.085
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.92	.;D;D
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.30	T;T;T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	0.0	N;.;.
PrimateAI	Uncertain	0.71	T
REVEL	Benign	0.050
Sift4G	Benign	0.62	T;T;T
Polyphen		0.094	B;B;B
Vest4		0.50
MutPred		0.41		Loss of MoRF binding (P = 0.0514);.;.;
MVP		0.66
MPC		0.59
ClinPred		0.38	T
GERP RS		4.3
Varity_R		0.15
gMVP		0.46

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

Publications

LitVar

Other links and lift over

dbSNP: rs755640421; hg19: chr17-4074078;