15-50182722-C-G

Position:

• chr15-50182722-C-G

Variant summary

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

The NM_003645.4(SLC27A2):​c.295C>G​(p.Leu99Val) 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. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: SLC27A2 NM_003645.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.48

Genes affected

SLC27A2 (HGNC:10996): (solute carrier family 27 member 2) The protein encoded by this gene is an isozyme of long-chain fatty-acid-coenzyme A ligase family. Although differing in substrate specificity, subcellular localization, and tissue distribution, all isozymes of this family convert free long-chain fatty acids into fatty acyl-CoA esters, and thereby play a key role in lipid biosynthesis and fatty acid degradation. This isozyme activates long-chain, branched-chain and very-long-chain fatty acids containing 22 or more carbons to their CoA derivatives. It is expressed primarily in liver and kidney, and is present in both endoplasmic reticulum and peroxisomes, but not in mitochondria. Its decreased peroxisomal enzyme activity is in part responsible for the biochemical pathology in X-linked adrenoleukodystrophy. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2009]

ATP8B4 (HGNC:13536): (ATPase phospholipid transporting 8B4 (putative)) This gene encodes a member of the cation transport ATPase (P-type) family and type IV subfamily. The encoded protein is involved in phospholipid transport in the cell membrane. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2013]

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=0.08610511).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SLC27A2	NM_003645.4	c.295C>G	p.Leu99Val	missense_variant	1/10	ENST00000267842.10	NP_003636.2
SLC27A2	NM_001159629.2	c.295C>G	p.Leu99Val	missense_variant	1/9		NP_001153101.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SLC27A2	ENST00000267842.10	c.295C>G	p.Leu99Val	missense_variant	1/10	1	NM_003645.4	ENSP00000267842	P1
SLC27A2	ENST00000380902.8	c.295C>G	p.Leu99Val	missense_variant	1/9	1		ENSP00000370289
ATP8B4	ENST00000558829.1	c.-504G>C		5_prime_UTR_variant	1/4	3		ENSP00000453539

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 33

EpiCase AF: 0.0000545

EpiControl AF: 0.00

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 30, 2022

The c.295C>G (p.L99V) alteration is located in exon 1 (coding exon 1) of the SLC27A2 gene. This alteration results from a C to G substitution at nucleotide position 295, causing the leucine (L) at amino acid position 99 to be replaced by a valine (V). 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	0.068
BayesDel_addAF	Benign	-0.24	T
BayesDel_noAF	Benign	-0.58
CADD	Benign	16
DANN	Benign	0.93
DEOGEN2	Benign	0.10	T;.
Eigen	Benign	-0.52
Eigen_PC	Benign	-0.41
FATHMM_MKL	Benign	0.083	N
LIST_S2	Benign	0.68	T;T
M_CAP	Benign	0.0079	T
MetaRNN	Benign	0.086	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.83	L;L
MutationTaster	Benign	0.93	N;N
PrimateAI	Benign	0.34	T
PROVEAN	Benign	0.17	N;N
REVEL	Benign	0.13
Sift	Benign	0.55	T;T
Sift4G	Benign	0.50	T;T
Polyphen		0.0030	B;.
Vest4		0.046
MutPred		0.56		Gain of catalytic residue at L99 (P = 0.0826);Gain of catalytic residue at L99 (P = 0.0826);
MVP		0.51
MPC		0.74
ClinPred		0.10	T
GERP RS		4.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.047
gMVP		0.40

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: chr15-50474919;