Genetic Variant NM_144611.4:c.388G>T (chr17-4150028-G-T) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_144611.4(CYB5D2):c.388G>T(p.Val130Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000103 in 1,461,676 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000010 ( 0 hom. )

Consequence

CYB5D2
NM_144611.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.33

Variant links:

Genes affected

CYB5D2 (HGNC:28471): (cytochrome b5 domain containing 2) Predicted to enable heme binding activity. Predicted to be involved in nervous system development. Predicted to act upstream of or within positive regulation of neuron differentiation. Predicted to be located in extracellular region. Predicted to be active in endomembrane system and membrane. [provided by Alliance of Genome Resources, Apr 2022]

CYB5D2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.925

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CYB5D2	NM_144611.4 link	c.388G>T	p.Val130Phe	missense_variant	Exon 2 of 4	ENST00000301391.8	NP_653212.1	Q8WUJ1-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CYB5D2	ENST00000301391.8 link	c.388G>T	p.Val130Phe	missense_variant	Exon 2 of 4	1	NM_144611.4	ENSP00000301391.4		Q8WUJ1-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000159

AC:

AN:

251438

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135892

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000131

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000103

AC:

AN:

1461676

Hom.:

Cov.:

AF XY:

0.0000151

AC XY:

AN XY:

727156

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000139

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 15, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.388G>T (p.V130F) alteration is located in exon 2 (coding exon 2) of the CYB5D2 gene. This alteration results from a G to T substitution at nucleotide position 388, causing the valine (V) at amino acid position 130 to be replaced by a phenylalanine (F). 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

Benign

0.26

BayesDel_addAF

Uncertain

0.098

BayesDel_noAF

Pathogenic

0.14

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.92

.;.;D;T

Eigen

Uncertain

0.58

Eigen_PC

Uncertain

0.40

FATHMM_MKL

Uncertain

0.96

LIST_S2

Benign

0.76

.;T;T;T

M_CAP

Pathogenic

0.40

MetaRNN

Pathogenic

0.92

D;D;D;D

MetaSVM

Uncertain

0.64

MutationAssessor

Pathogenic

3.6

.;.;H;.

PrimateAI

Benign

0.36

PROVEAN

Uncertain

-3.9

.;.;D;.

REVEL

Pathogenic

0.73

Sift

Uncertain

0.010

.;.;D;.

Sift4G

Uncertain

0.0060

D;D;D;D

Polyphen

1.0

.;.;D;.

Vest4

0.71

MutPred

0.74

.;.;Gain of ubiquitination at K125 (P = 0.135);.;

MVP

0.42

MPC

0.70

ClinPred

0.94

GERP RS

3.4

Varity_R

0.52

gMVP

0.91

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