Genetic Variant NM_014398.4:c.809C>A (chr3-183152454-G-T) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2PP3

The NM_014398.4(LAMP3):c.809C>A(p.Ala270Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,460,860 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. A270T) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

LAMP3
NM_014398.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.965

Publications

0 publications found

Variant links:

Genes affected

LAMP3 (HGNC:14582): (lysosomal associated membrane protein 3) Dendritic cells (DCs) are the most potent antigen-presenting cells. Immature DCs efficiently capture antigens and differentiate into interdigitating dendritic cells (IDCs) in lymphoid tissues that induce primary T-cell responses (summary by de Saint-Vis et al., 1998 [PubMed 9768752]).[supplied by OMIM, Dec 2010]

LAMP3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.827

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LAMP3	NM_014398.4 link	c.809C>A	p.Ala270Asp	missense_variant	Exon 3 of 6	ENST00000265598.8	NP_055213.2	Q9UQV4
LAMP3	XM_005247360.6 link	c.809C>A	p.Ala270Asp	missense_variant	Exon 4 of 7		XP_005247417.1
LAMP3	XM_047447967.1 link	c.809C>A	p.Ala270Asp	missense_variant	Exon 3 of 6		XP_047303923.1
LAMP3	XM_011512688.3 link	c.809C>A	p.Ala270Asp	missense_variant	Exon 3 of 6		XP_011510990.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LAMP3	ENST00000265598.8 link	c.809C>A	p.Ala270Asp	missense_variant	Exon 3 of 6	1	NM_014398.4	ENSP00000265598.3		Q9UQV4
LAMP3	ENST00000466939.1 link	c.737C>A	p.Ala246Asp	missense_variant	Exon 3 of 6	2		ENSP00000418912.1		E7ETP9

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1460860

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726796

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33410

American (AMR)

AF:

0.0000673

AC:

AN:

44588

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26122

East Asian (EAS)

AF:

0.00

AC:

AN:

39590

South Asian (SAS)

AF:

0.00

AC:

AN:

86138

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53396

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5674

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111594

Other (OTH)

AF:

0.00

AC:

AN:

60348

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.408

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 28, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.809C>A (p.A270D) alteration is located in exon 3 (coding exon 3) of the LAMP3 gene. This alteration results from a C to A substitution at nucleotide position 809, causing the alanine (A) at amino acid position 270 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

Pathogenic

0.64

BayesDel_addAF

Benign

-0.024

BayesDel_noAF

Benign

-0.27

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.32

T;T

Eigen

Benign

0.046

Eigen_PC

Benign

-0.12

FATHMM_MKL

Benign

0.36

LIST_S2

Benign

0.70

T;T

M_CAP

Benign

0.011

MetaRNN

Pathogenic

0.83

D;D

MetaSVM

Benign

-0.96

MutationAssessor

Pathogenic

3.0

M;.

PhyloP100

0.96

PrimateAI

Benign

0.35

PROVEAN

Uncertain

-3.9

D;D

REVEL

Benign

0.16

Sift

Uncertain

0.0030

D;D

Sift4G

Uncertain

0.0030

D;D

Polyphen

0.98

D;.

Vest4

0.70

MutPred

0.75

Gain of disorder (P = 0.0575);.;

MVP

0.14

MPC

0.35

ClinPred

0.96

GERP RS

2.8

Varity_R

0.77

gMVP

0.32

Mutation Taster

=76/24

polymorphism

(source)

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

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NM_014398.4:c.809C>A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over