Genetic Variant CYB5D1:p.Asn114Lys (chr17-7858710-C-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_144607.6(CYB5D1):c.342C>G(p.Asn114Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,458,120 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

CYB5D1
NM_144607.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.0810

Variant links:

Genes affected

CYB5D1 (HGNC:26516): (cytochrome b5 domain containing 1) Predicted to enable metal ion binding activity. [provided by Alliance of Genome Resources, Apr 2022]

CYB5D1 links:

NAA38 (HGNC:28212): (N-alpha-acetyltransferase 38, NatC auxiliary subunit) Involved in negative regulation of apoptotic process. Located in cytoplasm and nucleoplasm. Part of NatC complex. Colocalizes with polysome. [provided by Alliance of Genome Resources, Apr 2022]

NAA38 links:

ENSG00000280046 (HGNC:):

ENSG00000280046 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CYB5D1	NM_144607.6 link	c.342C>G	p.Asn114Lys	missense_variant	Exon 3 of 4	ENST00000332439.5	NP_653208.2	Q6P9G0-1
CYB5D1	NM_001330110.2 link	c.342C>G	p.Asn114Lys	missense_variant	Exon 3 of 4		NP_001317039.1	Q6P9G0-2
NAA38	NM_001330111.2 link	c.4-1512G>C		intron_variant	Intron 3 of 4		NP_001317040.1	I3L4V0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CYB5D1	ENST00000332439.5 link	c.342C>G	p.Asn114Lys	missense_variant	Exon 3 of 4	1	NM_144607.6	ENSP00000331479.4		Q6P9G0-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.86e-7

AC:

AN:

1458120

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

725190

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.01e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 28, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.342C>G (p.N114K) alteration is located in exon 3 (coding exon 3) of the CYB5D1 gene. This alteration results from a C to G substitution at nucleotide position 342, causing the asparagine (N) at amino acid position 114 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.66

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.46

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.13

.;T

Eigen

Benign

-0.19

Eigen_PC

Benign

-0.23

FATHMM_MKL

Benign

0.30

LIST_S2

Uncertain

0.89

D;D

M_CAP

Benign

0.016

MetaRNN

Uncertain

0.43

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.9

L;L

PrimateAI

Uncertain

0.58

PROVEAN

Uncertain

-2.7

.;D

REVEL

Benign

0.19

Sift

Benign

0.43

.;T

Sift4G

Benign

0.64

T;T

Polyphen

0.99

D;D

Vest4

0.56

MutPred

0.52

Gain of ubiquitination at N114 (P = 0.0185);Gain of ubiquitination at N114 (P = 0.0185);

MVP

0.22

MPC

1.7

ClinPred

0.95

GERP RS

-0.93

Varity_R

0.23

gMVP

0.74

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over