1-52927401-C-T

Position:

• chr1-52927401-C-T

Variant summary

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

The NM_002979.5(SCP2):​c.5C>T​(p.Ser2Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000694 in 1,440,914 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 (★). Synonymous variant affecting the same amino acid position (i.e. S2S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: SCP2 NM_002979.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.10

Genes affected

SCP2 (HGNC:10606): (sterol carrier protein 2) This gene encodes two proteins: sterol carrier protein X (SCPx) and sterol carrier protein 2 (SCP2), as a result of transcription initiation from 2 independently regulated promoters. The transcript initiated from the proximal promoter encodes the longer SCPx protein, and the transcript initiated from the distal promoter encodes the shorter SCP2 protein, with the 2 proteins sharing a common C-terminus. Evidence suggests that the SCPx protein is a peroxisome-associated thiolase that is involved in the oxidation of branched chain fatty acids, while the SCP2 protein is thought to be an intracellular lipid transfer protein. This gene is highly expressed in organs involved in lipid metabolism, and may play a role in Zellweger syndrome, in which cells are deficient in peroxisomes and have impaired bile acid synthesis. Alternative splicing of this gene produces multiple transcript variants, some encoding different isoforms.[provided by RefSeq, Aug 2010]

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=0.10664803).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SCP2	NM_002979.5	c.5C>T	p.Ser2Phe	missense_variant	1/16	ENST00000371514.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SCP2	ENST00000371514.8	c.5C>T	p.Ser2Phe	missense_variant	1/16	1	NM_002979.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.94e-7 AC: 1 AN: 1440914 Hom.: 0 Cov.: 32 AF XY: 0.00000140 AC XY: 1 AN XY: 714386

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000121

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Oct 03, 2022

This sequence change replaces serine, which is neutral and polar, with phenylalanine, which is neutral and non-polar, at codon 2 of the SCP2 protein (p.Ser2Phe). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with SCP2-related conditions. ClinVar contains an entry for this variant (Variation ID: 1483727). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.39
CADD	Benign	6.3
DANN	Benign	0.86
DEOGEN2	Benign	0.22	T;.;.;.;T
Eigen	Benign	-1.5
Eigen_PC	Benign	-1.6
FATHMM_MKL	Benign	0.027	N
LIST_S2	Benign	0.62	T;T;T;T;T
M_CAP	Benign	0.038	D
MetaRNN	Benign	0.11	T;T;T;T;T
MetaSVM	Benign	-0.75	T
MutationAssessor	Benign	0.0	N;N;N;N;.
MutationTaster	Benign	1.0	N;N;N;N;N
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	-0.31	N;N;N;N;.
REVEL	Benign	0.13
Sift	Benign	0.030	D;D;D;D;.
Sift4G	Uncertain	0.014	D;D;D;D;.
Polyphen		0.12	B;.;.;.;.
Vest4		0.15
MutPred		0.33		Loss of phosphorylation at S2 (P = 0.0182);Loss of phosphorylation at S2 (P = 0.0182);Loss of phosphorylation at S2 (P = 0.0182);Loss of phosphorylation at S2 (P = 0.0182);Loss of phosphorylation at S2 (P = 0.0182);
MVP		0.45
MPC		0.42
ClinPred		0.070	T
GERP RS		-5.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.2
Varity_R		0.043
gMVP		0.60

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: rs1244050094; hg19: chr1-53393073;