2-88126250-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 4P and 4B. PM1 PM2 BP4_Strong

The NM_001443.3(FABP1):c.166T>A(p.Ser56Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: FABP1 NM_001443.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.590

Genes affected

FABP1 (HGNC:3555): (fatty acid binding protein 1) This gene encodes the fatty acid binding protein found in liver. Fatty acid binding proteins are a family of small, highly conserved, cytoplasmic proteins that bind long-chain fatty acids and other hydrophobic ligands. This protein and FABP6 (the ileal fatty acid binding protein) are also able to bind bile acids. It is thought that FABPs roles include fatty acid uptake, transport, and metabolism. [provided by RefSeq, Mar 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM1: In a modified_residue Phosphoserine (size 0) in uniprot entity FABPL_HUMAN
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.04870683).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FABP1	NM_001443.3	c.166T>A	p.Ser56Thr	missense_variant	2/4	ENST00000295834.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FABP1	ENST00000295834.8	c.166T>A	p.Ser56Thr	missense_variant	2/4	1	NM_001443.3	P1
FABP1	ENST00000393750.3	c.166T>A	p.Ser56Thr	missense_variant	2/3	2
FABP1	ENST00000472846.1	n.208T>A		non_coding_transcript_exon_variant	2/2	2
FABP1	ENST00000495375.1	n.452T>A		non_coding_transcript_exon_variant	3/4	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251466 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135906

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000879

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 30

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

Jun 17, 2022

The c.166T>A (p.S56T) alteration is located in exon 2 (coding exon 2) of the FABP1 gene. This alteration results from a T to A substitution at nucleotide position 166, causing the serine (S) at amino acid position 56 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	0.073
BayesDel_addAF	Benign	-0.31	T
BayesDel_noAF	Benign	-0.68
Cadd	Benign	0.30
Dann	Benign	0.46
DEOGEN2	Benign	0.028	T;.
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.10	N
LIST_S2	Benign	0.61	T;T
M_CAP	Benign	0.0081	T
MetaRNN	Benign	0.049	T;T
MetaSVM	Benign	-0.97	T
MutationAssessor	Benign	1.1	L;.
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-1.3	N;N
REVEL	Benign	0.024
Sift	Benign	0.36	T;T
Sift4G	Benign	0.77	T;T
Polyphen		0.0	B;B
Vest4		0.16
MutPred		0.37		Gain of phosphorylation at S56 (P = 0.0805);Gain of phosphorylation at S56 (P = 0.0805);
MVP		0.099
MPC		0.23
ClinPred		0.17	T
GERP RS		-8.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.27
gMVP		0.42

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

LitVar

Other links and lift over

dbSNP: rs753531974; hg19: chr2-88425769;