Genetic Variant LRAT:p.Phe25Ser (chr4-154744400-T-C) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_004744.5(LRAT):c.74T>C(p.Phe25Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,880 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. F25Y) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

LRAT
NM_004744.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.92

Publications

0 publications found

Variant links:

Genes affected

LRAT (HGNC:6685): (lecithin retinol acyltransferase) The protein encoded by this gene localizes to the endoplasmic reticulum, where it catalyzes the esterification of all-trans-retinol into all-trans-retinyl ester. This reaction is an important step in vitamin A metabolism in the visual system. Mutations in this gene have been associated with early-onset severe retinal dystrophy and Leber congenital amaurosis 14. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2014]

LRAT Gene-Disease associations (from GenCC):

Leber congenital amaurosis 14
Inheritance: AR Classification: STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
Leber congenital amaurosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
retinitis pigmentosa
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
severe early-childhood-onset retinal dystrophy
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

LRAT links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.3896587).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
LRAT	NM_004744.5 link	c.74T>C	p.Phe25Ser	missense_variant	Exon 2 of 3	ENST00000336356.4	NP_004735.2
LRAT	NM_001301645.2 link	c.74T>C	p.Phe25Ser	missense_variant	Exon 2 of 3		NP_001288574.1
LRAT	XM_047416405.1 link	c.74T>C	p.Phe25Ser	missense_variant	Exon 2 of 3		XP_047272361.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LRAT	ENST00000336356.4 link	c.74T>C	p.Phe25Ser	missense_variant	Exon 2 of 3	1	NM_004744.5	ENSP00000337224.3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461880

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727242

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53408

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1112010

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Benign

-0.099

BayesDel_noAF

Benign

-0.38

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.55

.;D;D

Eigen

Benign

-0.10

Eigen_PC

Benign

-0.047

FATHMM_MKL

Uncertain

0.85

LIST_S2

Benign

0.67

T;.;T

M_CAP

Benign

0.015

MetaRNN

Benign

0.39

T;T;T

MetaSVM

Benign

-0.94

MutationAssessor

Uncertain

2.4

.;M;M

PhyloP100

1.9

PrimateAI

Benign

0.41

PROVEAN

Uncertain

-3.2

D;N;N

REVEL

Benign

0.17

Sift

Benign

0.16

T;T;T

Sift4G

Benign

0.30

T;T;T

Polyphen

0.26

.;B;B

Vest4

0.11

MutPred

0.68

Gain of disorder (P = 0.0028);Gain of disorder (P = 0.0028);Gain of disorder (P = 0.0028);

MVP

0.62

MPC

0.89

ClinPred

0.87

GERP RS

5.0

PromoterAI

0.0041

Neutral

(source)

Varity_R

0.25

gMVP

0.75

Mutation Taster

=86/14

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over