X-37805098-C-A

Position:

• chrX-37805098-C-A

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM2 PP3_Strong PP5_Very_Strong

The NM_000397.4(CYBB):​c.1244C>A​(p.Pro415His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★).

• Frequency: Genomes: not found (cov: 24)
• Consequence: CYBB NM_000397.4 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:3 O:1
• Conservation: PhyloP100: 7.57

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]

ACMG classification

Verdict is Pathogenic. Variant got 14 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.996
• PP5: Variant X-37805098-C-A is Pathogenic according to our data. Variant chrX-37805098-C-A is described in ClinVar as [Pathogenic]. Clinvar id is 10920.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chrX-37805098-C-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CYBB	NM_000397.4	c.1244C>A	p.Pro415His	missense_variant	10/13	ENST00000378588.5	NP_000388.2
CYBB	XM_047441855.1	c.938C>A	p.Pro313His	missense_variant	9/12		XP_047297811.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CYBB	ENST00000378588.5	c.1244C>A	p.Pro415His	missense_variant	10/13	1	NM_000397.4	ENSP00000367851	P1
CYBB	ENST00000696171.1	c.1148C>A	p.Pro383His	missense_variant	9/12			ENSP00000512462
CYBB	ENST00000696170.1	c.*753C>A		3_prime_UTR_variant, NMD_transcript_variant	9/12			ENSP00000512461

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 24

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:1 Other:1

not provided, no classification provided	literature only	UniProtKB/Swiss-Prot	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Apr 01, 2019	- -

Granulomatous disease, chronic, X-linked, variant Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Feb 19, 2019

- -

Granulomatous disease, chronic, X-linked Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 03, 2020

This variant has been observed in individual(s) with chronic granulomatous disease (PMID: 2556453, 11162142). ClinVar contains an entry for this variant (Variation ID: 10920). For these reasons, this variant has been classified as Pathogenic. This variant disrupts the p.Pro415 amino acid residue in CYBB. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 11162142, Invitae). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. This variant has been reported to affect CYBB protein function (PMID: 20724480). This variant is not present in population databases (ExAC no frequency). This sequence change replaces proline with histidine at codon 415 of the CYBB protein (p.Pro415His). The proline residue is highly conserved and there is a moderate physicochemical difference between proline and histidine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.73	D
BayesDel_noAF	Pathogenic	0.81
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.95	D
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	1.0	D
M_CAP	Pathogenic	0.96	D
MetaRNN	Pathogenic	1.0	D
MetaSVM	Pathogenic	0.98	D
MutationAssessor	Pathogenic	4.0	H
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-8.9	D
REVEL	Pathogenic	0.98
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.97
MutPred		0.99		Gain of catalytic residue at P415 (P = 0.1255);
MVP		0.99
MPC		1.7
ClinPred		1.0	D
GERP RS		5.9
Varity_R		0.99
gMVP		0.98

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

Other links and lift over

dbSNP: rs137854585; hg19: chrX-37664351;