4-186191672-A-T

Variant names:

• chr4-186191672-A-T
• rs2241819
• NM_207352.4:c.-152A>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_207352.4(CYP4V2):​c.-152A>T variant causes a 5 prime UTR 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 35)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CYP4V2 NM_207352.4 5_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -2.29
• Publications: 16 publications found

Genes affected

CYP4V2 (HGNC:23198): (cytochrome P450 family 4 subfamily V member 2) This gene encodes a member of the cytochrome P450 hemethiolate protein superfamily which are involved in oxidizing various substrates in the metabolic pathway. It is implicated in the metabolism of fatty acid precursors into n-3 polyunsaturated fatty acids. Mutations in this gene result in Bietti crystalline corneoretinal dystrophy. [provided by RefSeq, Jul 2008]

CYP4V2 Gene-Disease associations (from GenCC):

• Bietti crystalline corneoretinal dystrophy

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Laboratory for Molecular Medicine, Orphanet, ClinGen, Labcorp Genetics (formerly Invitae), Illumina, G2P

FLJ38576 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.64).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_207352.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CYP4V2	NM_207352.4	MANE Select	c.-152A>T		5_prime_UTR	Exon 1 of 11	NP_997235.3	Q6ZWL3-1
	FLJ38576	NR_046264.1		n.-182T>A		upstream_gene	N/A

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CYP4V2	ENST00000378802.5	TSL:1 MANE Select	c.-152A>T		5_prime_UTR	Exon 1 of 11	ENSP00000368079.4	Q6ZWL3-1
	CYP4V2	ENST00000905174.1		c.-152A>T		5_prime_UTR	Exon 1 of 11	ENSP00000575233.1
	CYP4V2	ENST00000905177.1		c.-152A>T		5_prime_UTR	Exon 1 of 11	ENSP00000575236.1

Frequencies

GnomAD3 genomes Cov.: 35

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 512990 Hom.: 0 Cov.: 7 AF XY: 0.00 AC XY: 0 AN XY: 250886

African (AFR) AF: 0.00 AC: 0 AN: 11126

American (AMR) AF: 0.00 AC: 0 AN: 6434

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 9102

East Asian (EAS) AF: 0.00 AC: 0 AN: 20092

South Asian (SAS) AF: 0.00 AC: 0 AN: 8752

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 20152

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 1690

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 412138

Other (OTH) AF: 0.00 AC: 0 AN: 23504

GnomAD4 genome Cov.: 35

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.64
CADD	Benign	2.9
DANN	Benign	0.85
PhyloP100		-2.3
PromoterAI		0.33	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs2241819; hg19: chr4-187112826;