Genetic Variant CYBA:p.Phe80Leu (chr16-88646802-G-C) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_000101.4(CYBA):c.240C>G(p.Phe80Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,718 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar. Synonymous variant affecting the same amino acid position (i.e. F80F) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

CYBA
NM_000101.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -1.33

Publications

0 publications found

Variant links:

Genes affected

CYBA (HGNC:2577): (cytochrome b-245 alpha chain) Cytochrome b is comprised of a light chain (alpha) and a heavy chain (beta). This gene encodes the light, alpha subunit which has been proposed as a primary component of the microbicidal oxidase system of phagocytes. Mutations in this gene are associated with autosomal recessive chronic granulomatous disease (CGD), that is characterized by the failure of activated phagocytes to generate superoxide, which is important for the microbicidal activity of these cells. [provided by RefSeq, Jul 2008]

CYBA Gene-Disease associations (from GenCC):

granulomatous disease, chronic, autosomal recessive, cytochrome b-negative
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
chronic granulomatous disease
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CYBA links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.2626211).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CYBA	NM_000101.4 link	c.240C>G	p.Phe80Leu	missense_variant	Exon 4 of 6	ENST00000261623.8	NP_000092.2
CYBA	XM_011522905.4 link	c.240C>G	p.Phe80Leu	missense_variant	Exon 4 of 6		XP_011521207.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CYBA	ENST00000261623.8 link	c.240C>G	p.Phe80Leu	missense_variant	Exon 4 of 6	1	NM_000101.4	ENSP00000261623.3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461718

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727172

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53306

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111964

Other (OTH)

AF:

0.00

AC:

AN:

60386

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.41

BayesDel_addAF

Benign

-0.068

BayesDel_noAF

Benign

-0.33

CADD

Benign

0.13

(source)

DANN

Benign

0.90

DEOGEN2

Benign

0.32

T;T;.;T

Eigen

Benign

-1.5

Eigen_PC

Benign

-1.6

FATHMM_MKL

Benign

0.23

LIST_S2

Benign

0.70

T;T;T;T

M_CAP

Benign

0.083

MetaRNN

Benign

0.26

T;T;T;T

MetaSVM

Benign

-0.76

MutationAssessor

Benign

1.9

M;.;.;.

PhyloP100

-1.3

PrimateAI

Uncertain

0.53

PROVEAN

Benign

-0.61

N;N;N;N

REVEL

Benign

0.28

Sift

Benign

0.62

T;T;T;T

Sift4G

Benign

0.48

T;T;T;.

Vest4

0.26

ClinPred

0.14

GERP RS

-8.9

PromoterAI

-0.052

Neutral

(source)

RBP_binding_hub_radar

0.97

RBP_regulation_power_radar

2.7

Varity_R

0.058

gMVP

0.81

Mutation Taster

=80/20

polymorphism

(source)

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over