4-107931738-C-T

Position:

• chr4-107931738-C-T

Variant summary

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

The NM_183075.3(CYP2U1):​c.95C>T​(p.Pro32Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000158 in 1,267,848 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 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)
  • Exomes 𝑓: 0.0000016 (0 hom.)
• Consequence: CYP2U1 NM_183075.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.927

Genes affected

CYP2U1 (HGNC:20582): (cytochrome P450 family 2 subfamily U member 1) This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This enzyme is a hydroxylase that metabolizes arachidonic acid, docosahexaenoic acid, and other long chain fatty acids. [provided by RefSeq, Jul 2008]

CYP2U1-AS1 (HGNC:54817): (CYP2U1 and SGMS2 antisense RNA 1)

LOC107986298 (HGNC:):

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=0.10355976).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CYP2U1	NM_183075.3	c.95C>T	p.Pro32Leu	missense_variant	1/5	ENST00000332884.11	NP_898898.1
CYP2U1-AS1	NR_125929.1	n.149+233G>A		intron_variant, non_coding_transcript_variant
LOC107986298	XR_001741784.2	n.205-21189G>A		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CYP2U1	ENST00000332884.11	c.95C>T	p.Pro32Leu	missense_variant	1/5	1	NM_183075.3	ENSP00000333212	P1
CYP2U1-AS1	ENST00000656249.1	n.81-21189G>A		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000158 AC: 2 AN: 1267848 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 619860

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000194

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Spastic paraplegia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

May 18, 2021

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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt CYP2U1 protein function. This variant has not been reported in the literature in individuals with CYP2U1-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate insufficient coverage at this position in the ExAC database. This sequence change replaces proline with leucine at codon 32 of the CYP2U1 protein (p.Pro32Leu). The proline residue is weakly conserved and there is a moderate physicochemical difference between proline and leucine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	13
DANN	Uncertain	0.98
DEOGEN2	Benign	0.081	T
Eigen	Benign	-0.96
Eigen_PC	Benign	-0.99
FATHMM_MKL	Benign	0.075	N
LIST_S2	Benign	0.49	T
M_CAP	Uncertain	0.16	D
MetaRNN	Benign	0.10	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	1.9	L
MutationTaster	Benign	1.0	N;N
PrimateAI	Pathogenic	0.83	D
PROVEAN	Benign	0.16	N
REVEL	Benign	0.10
Sift	Benign	0.23	T
Sift4G	Benign	0.34	T
Polyphen		0.0	B
Vest4		0.30
MutPred		0.30		Loss of disorder (P = 0.0572);
MVP		0.27
MPC		1.5
ClinPred		0.22	T
GERP RS		2.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.027
gMVP		0.37

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr4-108852894;