Genetic Variant HSCB:p.Glu226Gly (chr22-28757138-A-G) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_172002.5(HSCB):c.677A>G(p.Glu226Gly) variant causes a missense change. The variant allele was found at a frequency of 0.0000204 in 1,564,804 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000021 ( 0 hom. )

Consequence

HSCB
NM_172002.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.08

Variant links:

Genes affected

HSCB (HGNC:28913): (HscB mitochondrial iron-sulfur cluster cochaperone) This gene encodes a DnaJ-type co-chaperone and member of the heat shock cognate B (HscB) family of proteins. The encoded protein plays a role in the synthesis of iron-sulfur clusters, protein cofactors that are involved in the redox reactions of mitochondrial electron transport and other processes. Cells in which this gene is knocked down exhibit reduced activity of iron-sulfur cluster-dependent enzymes including succinate dehydrogenase and aconitase. The encoded protein may stimulate the ATPase activity of the mitochondrial stress-70 protein. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2015]

HSCB links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.34504563).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HSCB	NM_172002.5 link	c.677A>G	p.Glu226Gly	missense_variant	Exon 6 of 6	ENST00000216027.8	NP_741999.3	Q8IWL3A0A384NYJ4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HSCB	ENST00000216027.8 link	c.677A>G	p.Glu226Gly	missense_variant	Exon 6 of 6	1	NM_172002.5	ENSP00000216027.3		Q8IWL3

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152236

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000200

AC:

AN:

250470

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135662

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000199

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000205

AC:

AN:

1412450

Hom.:

Cov.:

AF XY:

0.0000170

AC XY:

AN XY:

705582

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.000622

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000117

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000749

Gnomad4 OTH exome

AF:

0.0000511

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152354

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74514

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.000288

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000987

Hom.:

Bravo

AF:

0.0000378

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 12, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.677A>G (p.E226G) alteration is located in exon 6 (coding exon 6) of the HSCB gene. This alteration results from a A to G substitution at nucleotide position 677, causing the glutamic acid (E) at amino acid position 226 to be replaced by a glycine (G). 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

0.14

BayesDel_addAF

Benign

-0.010

BayesDel_noAF

Benign

-0.19

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.16

Eigen

Uncertain

0.67

Eigen_PC

Uncertain

0.63

FATHMM_MKL

Uncertain

0.84

LIST_S2

Benign

0.74

M_CAP

Benign

0.019

MetaRNN

Benign

0.35

MetaSVM

Benign

-0.48

MutationAssessor

Pathogenic

3.1

PrimateAI

Uncertain

0.54

PROVEAN

Uncertain

-3.2

REVEL

Benign

0.27

Sift

Uncertain

0.028

Sift4G

Uncertain

0.020

Polyphen

1.0

Vest4

0.35

MVP

0.72

MPC

0.75

ClinPred

0.95

GERP RS

5.1

Varity_R

0.45

gMVP

0.40

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