15-49862303-A-G

Position:

• chr15-49862303-A-G

Variant summary

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

The NM_024837.4(ATP8B4):​c.3239T>C​(p.Met1080Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,498 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: 6.8e-7 (0 hom.)
• Consequence: ATP8B4 NM_024837.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.95

Genes affected

ATP8B4 (HGNC:13536): (ATPase phospholipid transporting 8B4 (putative)) This gene encodes a member of the cation transport ATPase (P-type) family and type IV subfamily. The encoded protein is involved in phospholipid transport in the cell membrane. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2013]

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=0.3988179).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATP8B4	NM_024837.4	c.3239T>C	p.Met1080Thr	missense_variant	27/28	ENST00000284509.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATP8B4	ENST00000284509.11	c.3239T>C	p.Met1080Thr	missense_variant	27/28	5	NM_024837.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461498 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 727044

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 20, 2024

The c.3239T>C (p.M1080T) alteration is located in exon 27 (coding exon 26) of the ATP8B4 gene. This alteration results from a T to C substitution at nucleotide position 3239, causing the methionine (M) at amino acid position 1080 to be replaced by a threonine (T). 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	0.16
BayesDel_addAF	Benign	-0.082	T
BayesDel_noAF	Benign	-0.36
CADD	Benign	23
DANN	Uncertain	0.98
DEOGEN2	Benign	0.018	T;T
Eigen	Uncertain	0.39
Eigen_PC	Uncertain	0.45
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.91	D;.
M_CAP	Benign	0.023	T
MetaRNN	Benign	0.40	T;T
MetaSVM	Benign	-0.55	T
MutationAssessor	Benign	1.7	L;L
MutationTaster	Benign	0.71	D;D
PrimateAI	Benign	0.45	T
PROVEAN	Uncertain	-3.5	D;D
REVEL	Benign	0.21
Sift	Benign	0.054	T;T
Sift4G	Uncertain	0.040	D;D
Polyphen		0.24	B;B
Vest4		0.53
MutPred		0.60		Gain of glycosylation at M1080 (P = 0.0852);Gain of glycosylation at M1080 (P = 0.0852);
MVP		0.47
MPC		0.064
ClinPred		0.95	D
GERP RS		5.4
Varity_R		0.37
gMVP		0.77

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr15-50154500;