Genetic Variant NM_000397.4:c.466G>T (chrX-37793793-G-T) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PM5

The NM_000397.4(CYBB):c.466G>T(p.Ala156Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000000914 in 1,094,486 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A156D) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 21)

Exomes 𝑓: 9.1e-7 ( 0 hom. 0 hem. )

Consequence

CYBB
NM_000397.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 4.39

Publications

0 publications found

Variant links:

Genes affected

CYBB (HGNC:2578): (cytochrome b-245 beta chain) Cytochrome b (-245) is composed of cytochrome b alpha (CYBA) and beta (CYBB) chain. It has been proposed as a primary component of the microbicidal oxidase system of phagocytes. CYBB deficiency is one of five described biochemical defects associated with chronic granulomatous disease (CGD). In this disorder, there is decreased activity of phagocyte NADPH oxidase; neutrophils are able to phagocytize bacteria but cannot kill them in the phagocytic vacuoles. The cause of the killing defect is an inability to increase the cell's respiration and consequent failure to deliver activated oxygen into the phagocytic vacuole. [provided by RefSeq, Jul 2008]

CYBB Gene-Disease associations (from GenCC):

granulomatous disease, chronic, X-linked
Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
chronic granulomatous disease
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
X-linked Mendelian susceptibility to mycobacterial diseases due to CYBB deficiency
Inheritance: XL, Unknown Classification: SUPPORTIVE, LIMITED Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)

CYBB links:

ENSG00000250349 (HGNC:):

ENSG00000250349 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chrX-37793793-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 10925.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CYBB	NM_000397.4 link	c.466G>T	p.Ala156Ser	missense_variant	Exon 5 of 13	ENST00000378588.5	NP_000388.2	P04839A0A0S2Z3S6
CYBB	XM_047441855.1 link	c.160G>T	p.Ala54Ser	missense_variant	Exon 4 of 12		XP_047297811.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CYBB	ENST00000378588.5 link	c.466G>T	p.Ala156Ser	missense_variant	Exon 5 of 13	1	NM_000397.4	ENSP00000367851.4		P04839
ENSG00000250349	ENST00000465127.1 link	c.171+367793G>T		intron_variant	Intron 3 of 8	5		ENSP00000417050.1		B4E171

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

9.14e-7

AC:

AN:

1094486

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

360828

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26293

American (AMR)

AF:

0.00

AC:

AN:

35101

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19311

East Asian (EAS)

AF:

0.00

AC:

AN:

30169

South Asian (SAS)

AF:

0.00

AC:

AN:

54089

European-Finnish (FIN)

AF:

0.00

AC:

AN:

39561

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4113

European-Non Finnish (NFE)

AF:

0.00000119

AC:

AN:

839914

Other (OTH)

AF:

0.00

AC:

AN:

45935

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

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

Benign

0.17

BayesDel_addAF

Benign

-0.047

BayesDel_noAF

Benign

-0.31

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.36

FATHMM_MKL

Uncertain

0.85

LIST_S2

Benign

0.80

M_CAP

Pathogenic

0.56

MetaRNN

Uncertain

0.46

MetaSVM

Uncertain

-0.18

MutationAssessor

Benign

1.7

PhyloP100

4.4

PrimateAI

Benign

0.30

PROVEAN

Benign

-0.49

REVEL

Uncertain

0.36

Sift

Benign

0.26

Sift4G

Benign

0.25

Polyphen

0.12

Vest4

0.22

MutPred

0.64

Loss of helix (P = 0.0196);

MVP

0.90

MPC

0.56

ClinPred

0.38

GERP RS

5.7

Varity_R

0.26

gMVP

0.83

Mutation Taster

=79/21

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