Genetic Variant CYP26B1:p.His481Gln (chr2-72132323-G-T) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4BS2

The NM_019885.4(CYP26B1):c.1443C>A(p.His481Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000491 in 1,609,880 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000050 ( 1 hom. )

Consequence

CYP26B1
NM_019885.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.74

Variant links:

Genes affected

CYP26B1 (HGNC:20581): (cytochrome P450 family 26 subfamily B member 1) This gene encodes a member of the cytochrome P450 superfamily. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. The encoded protein is localized to the endoplasmic reticulum, and functions as a critical regulator of all-trans retinoic acid levels by the specific inactivation of all-trans retinoic acid to hydroxylated forms. Mutations in this gene are associated with radiohumeral fusions and other skeletal and craniofacial anomalies, and increased levels of the encoded protein are associated with atherosclerotic lesions. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2013]

CYP26B1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.42071074).

BS2

High AC in GnomAd4 at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CYP26B1	NM_019885.4 link	c.1443C>A	p.His481Gln	missense_variant	Exon 6 of 6	ENST00000001146.7	NP_063938.1	Q9NR63-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CYP26B1	ENST00000001146.7 link	c.1443C>A	p.His481Gln	missense_variant	Exon 6 of 6	1	NM_019885.4	ENSP00000001146.2	Q9NR63-1
CYP26B1	ENST00000546307.5 link	c.1218C>A	p.His406Gln	missense_variant	Exon 5 of 5	1		ENSP00000443304.1	Q9NR63-2
CYP26B1	ENST00000412253.1 link	c.870C>A	p.His290Gln	missense_variant	Exon 5 of 5	1		ENSP00000401465.1	E7ER08

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152196

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000333

AC:

AN:

240468

Hom.:

AF XY:

0.0000460

AC XY:

AN XY:

130404

show subpopulations

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:

0.000101

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000461

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000501

AC:

AN:

1457684

Hom.:

Cov.:

AF XY:

0.0000566

AC XY:

AN XY:

724684

show subpopulations

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:

0.000187

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000468

Gnomad4 OTH exome

AF:

0.0000498

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152196

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74362

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000847

Hom.:

Bravo

AF:

0.0000378

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Dec 13, 2022

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.56

BayesDel_addAF

Uncertain

0.13

BayesDel_noAF

Pathogenic

0.15

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.50

.;T;.

Eigen

Uncertain

0.50

Eigen_PC

Uncertain

0.60

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.95

D;D;D

M_CAP

Benign

0.052

MetaRNN

Benign

0.42

T;T;T

MetaSVM

Benign

-0.68

MutationAssessor

Uncertain

2.7

.;M;.

PrimateAI

Uncertain

0.72

PROVEAN

Pathogenic

-5.8

D;D;D

REVEL

Uncertain

0.52

Sift

Uncertain

0.0080

D;D;D

Sift4G

Uncertain

0.010

D;D;D

Polyphen

0.62

.;P;.

Vest4

0.44

MutPred

0.43

.;Gain of sheet (P = 0.0827);.;

MVP

0.85

MPC

0.98

ClinPred

0.76

GERP RS

5.6

Varity_R

0.75

gMVP

0.90

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over