Genetic Variant FABP2:p.Asn72Lys (chr4-119320694-A-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_000134.4(FABP2):c.216T>A(p.Asn72Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000693 in 1,442,078 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 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. N72S) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

FABP2
NM_000134.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.367

Publications

26 publications found

Variant links:

Genes affected

FABP2 (HGNC:3556): (fatty acid binding protein 2) The protein encoded by this gene is an intracellular fatty acid-binding protein that participates in the uptake, intracellular metabolism, and transport of long-chain fatty acids. The encoded protein is also involved in the modulation of cell growth and proliferation. This protein binds saturated long-chain fatty acids with high affinity, and may act as a lipid sensor to maintain energy homeostasis. [provided by RefSeq, Aug 2017]

FABP2 links:

ENSG00000294020 (HGNC:):

ENSG00000294020 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.121554166).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FABP2	NM_000134.4 link	c.216T>A	p.Asn72Lys	missense_variant	Exon 2 of 4	ENST00000274024.4	NP_000125.2	P12104

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FABP2	ENST00000274024.4 link	c.216T>A	p.Asn72Lys	missense_variant	Exon 2 of 4	1	NM_000134.4	ENSP00000274024.3		P12104

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000433

AC:

AN:

230746

AF XY:

0.00000798

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000598

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.93e-7

AC:

AN:

1442078

Hom.:

Cov.:

AF XY:

0.00000139

AC XY:

AN XY:

717374

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

31852

American (AMR)

AF:

0.00

AC:

AN:

40436

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25768

East Asian (EAS)

AF:

0.0000258

AC:

AN:

38698

South Asian (SAS)

AF:

0.00

AC:

AN:

82458

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52068

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5416

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1105848

Other (OTH)

AF:

0.00

AC:

AN:

59534

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.225

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.:

Alfa

AF:

0.00

Hom.:

73150

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.50

BayesDel_noAF

Benign

-0.78

CADD

Benign

(source)

DANN

Benign

0.76

Eigen

Benign

-1.0

Eigen_PC

Benign

-0.99

FATHMM_MKL

Benign

0.72

M_CAP

Benign

0.0065

MetaRNN

Benign

0.12

MetaSVM

Benign

-1.1

PhyloP100

0.37

PrimateAI

Benign

0.28

PROVEAN

Benign

-0.080

REVEL

Benign

0.021

Sift

Benign

0.34

Sift4G

Benign

0.52

Vest4

0.085

MutPred

0.35

Gain of ubiquitination at N72 (P = 0.0185);

MVP

0.16

MPC

0.12

ClinPred

0.046

GERP RS

-0.24

gMVP

0.40

Mutation Taster

=63/37

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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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