1-183556147-C-G

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_000433.4(NCF2):c.1552G>C(p.Asp518His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000287 in 1,614,180 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D518E) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0014 (2 hom., cov: 31)
  • Exomes 𝑓: 0.00017 (0 hom.)
• Consequence: NCF2 NM_000433.4 missense
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 0.961

Genes affected

NCF2 (HGNC:7661): (neutrophil cytosolic factor 2) This gene encodes neutrophil cytosolic factor 2, the 67-kilodalton cytosolic subunit of the multi-protein NADPH oxidase complex found in neutrophils. This oxidase produces a burst of superoxide which is delivered to the lumen of the neutrophil phagosome. Mutations in this gene, as well as in other NADPH oxidase subunits, can result in chronic granulomatous disease, a disease that causes recurrent infections by catalase-positive organisms. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jun 2010]

SMG7 (HGNC:16792): (SMG7 nonsense mediated mRNA decay factor) This gene encodes a protein that is essential for nonsense-mediated mRNA decay (NMD); a process whereby transcripts with premature termination codons are targeted for rapid degradation by a mRNA decay complex. The mRNA decay complex consists, in part, of this protein along with proteins SMG5 and UPF1. The N-terminal domain of this protein is thought to mediate its association with SMG5 or UPF1 while the C-terminal domain interacts with the mRNA decay complex. This protein may therefore couple changes in UPF1 phosphorylation state to the degradation of NMD-candidate transcripts. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Aug 2011]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0052708387).
• BP6: Variant 1-183556147-C-G is Benign according to our data. Variant chr1-183556147-C-G is described in ClinVar as [Likely_benign]. Clinvar id is 294073.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00144 (219/152314) while in subpopulation AFR AF= 0.00455 (189/41568). AF 95% confidence interval is 0.00402. There are 2 homozygotes in gnomad4. There are 104 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NCF2	NM_000433.4	c.1552G>C	p.Asp518His	missense_variant	15/15	ENST00000367535.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NCF2	ENST00000367535.8	c.1552G>C	p.Asp518His	missense_variant	15/15	1	NM_000433.4	P1

Frequencies

GnomAD3 genomes AF: 0.00144 AC: 219 AN: 152196 Hom.: 2 Cov.: 31

Gnomad AFR AF: 0.00456

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00144

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: 0.0000588

Gnomad OTH AF: 0.00191

GnomAD3 exomes AF: 0.000489 AC: 123 AN: 251436 Hom.: 0 AF XY: 0.000412 AC XY: 56 AN XY: 135884

Gnomad AFR exome AF: 0.00498

Gnomad AMR exome AF: 0.000810

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000980

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000616

Gnomad OTH exome AF: 0.000652

GnomAD4 exome AF: 0.000168 AC: 245 AN: 1461866 Hom.: 0 Cov.: 30 AF XY: 0.000144 AC XY: 105 AN XY: 727232

Gnomad4 AFR exome AF: 0.00403

Gnomad4 AMR exome AF: 0.000693

Gnomad4 ASJ exome AF: 0.0000383

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000696

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000468

Gnomad4 OTH exome AF: 0.000315

GnomAD4 genome AF: 0.00144 AC: 219 AN: 152314 Hom.: 2 Cov.: 31 AF XY: 0.00140 AC XY: 104 AN XY: 74484

Gnomad4 AFR AF: 0.00455

Gnomad4 AMR AF: 0.00144

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000588

Gnomad4 OTH AF: 0.00189

Alfa AF: 0.000227 Hom.: 0

Bravo AF: 0.00165

ESP6500AA AF: 0.00363 AC: 16

ESP6500EA AF: 0.00 AC: 0

ExAC AF: 0.000560 AC: 68

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.000164

EpiControl AF: 0.000119

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Granulomatous disease, chronic, autosomal recessive, cytochrome b-positive, type 2 Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Invitae	Jan 30, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.46	T
BayesDel_noAF	Benign	-0.43
Cadd	Benign	20
Dann	Uncertain	0.99
Eigen	Benign	-0.33
Eigen_PC	Benign	-0.44
FATHMM_MKL	Benign	0.25	N
LIST_S2	Benign	0.81	T;T;.;T
M_CAP	Benign	0.035	D
MetaRNN	Benign	0.0053	T;T;T;T
MetaSVM	Benign	-0.72	T
MutationTaster	Benign	1.0	N;N;N;N
PrimateAI	Benign	0.34	T
PROVEAN	Benign	-1.5	N;N;N;N
REVEL	Benign	0.095
Sift	Uncertain	0.0040	D;D;D;D
Sift4G	Uncertain	0.017	D;D;D;D
Polyphen		0.95	.;.;P;P
Vest4		0.11
MVP		0.78
MPC		0.64
ClinPred		0.0077	T
GERP RS		2.9
Varity_R		0.077
gMVP		0.38

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: rs143901397; hg19: chr1-183525282;