12-96006403-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000895.3(LTA4H):c.1441G>A(p.Glu481Lys) variant causes a missense change. The variant allele was found at a frequency of 0.000000691 in 1,446,644 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E481D) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: LTA4H NM_000895.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.43

Genes affected

LTA4H (HGNC:6710): (leukotriene A4 hydrolase) The protein encoded by this gene is an enzyme that contains both hydrolase and aminopeptidase activities. The hydrolase activity is used in the final step of the biosynthesis of leukotriene B4, a proinflammatory mediator. The aminopeptidase activity has been shown to degrade proline-glycine-proline (PGP), a neutrophil chemoattractant and biomarker for chronic obstructive pulmonary disease (COPD). Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2015]

(HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.21602297).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LTA4H	NM_000895.3	c.1441G>A	p.Glu481Lys	missense_variant	16/19	ENST00000228740.7
LOC102723340	XR_945236.4	n.741-3558C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LTA4H	ENST00000228740.7	c.1441G>A	p.Glu481Lys	missense_variant	16/19	1	NM_000895.3	P1
	ENST00000551849.2	n.342-3558C>T		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.91e-7 AC: 1 AN: 1446644 Hom.: 0 Cov.: 26 AF XY: 0.00000139 AC XY: 1 AN XY: 720256

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000253

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

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

Mar 28, 2023

The c.1441G>A (p.E481K) alteration is located in exon 16 (coding exon 16) of the LTA4H gene. This alteration results from a G to A substitution at nucleotide position 1441, causing the glutamic acid (E) at amino acid position 481 to be replaced by a lysine (K). 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	0.12
BayesDel_addAF	Benign	-0.038	T
BayesDel_noAF	Benign	-0.29
Cadd	Uncertain	24
Dann	Uncertain	1.0
DEOGEN2	Benign	0.20	T;.;.
Eigen	Benign	-0.028
Eigen_PC	Benign	0.16
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D;D;D
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.22	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.6	M;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Benign	0.47	T
PROVEAN	Uncertain	-2.4	N;N;N
REVEL	Benign	0.11
Sift	Benign	0.23	T;T;T
Sift4G	Benign	0.44	T;T;T
Polyphen		0.0030	B;.;B
Vest4		0.41
MutPred		0.46		Gain of ubiquitination at E481 (P = 0.0114);.;.;
MVP		0.57
MPC		0.31
ClinPred		0.96	D
GERP RS		5.7
Varity_R		0.62
gMVP		0.51

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: chr12-96400181;