2-201078901-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 2P and 9B. PM1BP4_StrongBP6BS2

The NM_002491.3(NDUFB3):c.19C>T(p.His7Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000597 in 1,610,936 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00066 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00059 ( 3 hom. )

Consequence

NDUFB3
NM_002491.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:1

Conservation

PhyloP100: 3.04

Variant links:

Genes affected

NDUFB3 (HGNC:7698): (NADH:ubiquinone oxidoreductase subunit B3) This gene encodes an accessory subunit of the mitochondrial membrane respiratory chain NADH dehydrogenase (Complex I) which is the first enzyme in the electron transport chain of mitochondria. This protein localizes to the inner membrane of the mitochondrion as a single-pass membrane protein. Mutations in this gene contribute to mitochondrial complex 1 deficiency. Alternative splicing results in multiple transcript variants encoding the same protein. Humans have multiple pseudogenes of this gene. [provided by RefSeq, Mar 2012]

NDUFB3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

PM1

In a modified_residue Pros-methylhistidine (size 0) in uniprot entity NDUB3_HUMAN

BP4

Computational evidence support a benign effect (MetaRNN=0.051812947).

BP6

Variant 2-201078901-C-T is Benign according to our data. Variant chr2-201078901-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 214762.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Likely_benign=1}.

BS2

High Homozygotes in GnomAdExome4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NDUFB3	NM_002491.3 link	c.19C>T	p.His7Tyr	missense_variant	Exon 2 of 3	ENST00000237889.9	NP_002482.1	O43676A0A024R413
NDUFB3	NM_001257102.2 link	c.19C>T	p.His7Tyr	missense_variant	Exon 3 of 4		NP_001244031.1	O43676A0A024R413
NDUFB3	XM_011511230.4 link	c.19C>T	p.His7Tyr	missense_variant	Exon 3 of 4		XP_011509532.1	O43676A0A024R413
NDUFB3	XM_047444488.1 link	c.19C>T	p.His7Tyr	missense_variant	Exon 3 of 4		XP_047300444.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NDUFB3	ENST00000237889.9 link	c.19C>T	p.His7Tyr	missense_variant	Exon 2 of 3	1	NM_002491.3	ENSP00000237889.4		O43676

Frequencies

GnomAD3 genomes

AF:

0.000658

AC:

100

AN:

151978

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:

0.00145

Gnomad FIN

AF:

0.00104

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00121

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000885

AC:

221

AN:

249836

Hom.:

AF XY:

0.00106

AC XY:

143

AN XY:

135028

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000293

Gnomad ASJ exome

AF:

0.000199

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00149

Gnomad FIN exome

AF:

0.00148

Gnomad NFE exome

AF:

0.00118

Gnomad OTH exome

AF:

0.00115

GnomAD4 exome

AF:

0.000591

AC:

862

AN:

1458840

Hom.:

Cov.:

AF XY:

0.000701

AC XY:

509

AN XY:

725748

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000451

Gnomad4 ASJ exome

AF:

0.000268

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00153

Gnomad4 FIN exome

AF:

0.00185

Gnomad4 NFE exome

AF:

0.000505

Gnomad4 OTH exome

AF:

0.000947

GnomAD4 genome

AF:

0.000657

AC:

100

AN:

152096

Hom.:

Cov.:

AF XY:

0.000673

AC XY:

AN XY:

74342

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:

0.00145

Gnomad4 FIN

AF:

0.00104

Gnomad4 NFE

AF:

0.00121

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000731

Hom.:

Bravo

AF:

0.000359

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000698

AC:

ExAC

AF:

0.00114

AC:

139

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.000763

EpiControl

AF:

0.000830

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:1

Jan 21, 2019

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

p.His7Tyr (CAT>TAT): c.19 C>T in exon 2 of the NDUFB3 gene (NM_002491.2) The H7Y variant has not been published as a mutation, nor has it been reported as a benign polymorphism to our knowledge. The H7Y variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. This substitution occurs at a position where amino acids with similar properties as Histidine are conserved across species. In silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic mutation or a rare benign variant. The variant is found in MITONUC-MITOP panel(s). -

Jan 13, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

The NDUFB3 p.His7Tyr variant was not identified in the literature nor was it identified in Cosmic. The variant was identified in dbSNP (ID: rs144513268), ClinVar (classified as a VUS by GeneDx) and LOVD 3.0. The variant was identified in control databases in 256 of 281208 chromosomes (2 homozygous) at a frequency of 0.00091 increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: Other in 12 of 7168 chromosomes (freq: 0.001674), South Asian in 45 of 30172 chromosomes (freq: 0.001491), European (Finnish) in 36 of 25096 chromosomes (freq: 0.001434), European (non-Finnish) in 160 of 128586 chromosomes (freq: 0.001244), Ashkenazi Jewish in 2 of 10364 chromosomes (freq: 0.000193) and Latino in 1 of 35004 chromosomes (freq: 0.000029), while the variant was not observed in the African and East Asian populations. The p.His7 residue is not conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) provide inconsistent predictions regarding the impact to the protein; this information is not very predictive of pathogenicity. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time. This variant is classified as a variant of uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.23

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.15

.;T;T;T

Eigen

Uncertain

0.34

Eigen_PC

Uncertain

0.37

FATHMM_MKL

Uncertain

0.79

LIST_S2

Benign

0.68

T;.;.;T

M_CAP

Uncertain

0.14

MetaRNN

Benign

0.052

T;T;T;T

MetaSVM

Uncertain

-0.11

PrimateAI

Benign

0.47

PROVEAN

Uncertain

-3.7

D;D;D;D

REVEL

Uncertain

0.30

Sift

Uncertain

0.018

D;D;D;D

Sift4G

Uncertain

0.022

D;D;D;D

Polyphen

0.94

.;P;P;P

Vest4

0.37

MVP

0.92

MPC

0.11

ClinPred

0.084

GERP RS

5.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.6

Varity_R

0.21

gMVP

0.60

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