Variant chr16-173179-C-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PP3_Moderate

The NM_000517.6(HBA2):c.150C>A(p.Ser50Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 13)

Exomes 𝑓: 0.0000012 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

HBA2
NM_000517.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1O:1

Conservation

PhyloP100: 0.341

Variant links:

Genes affected

HBA2 (HGNC:4824): (hemoglobin subunit alpha 2) The human alpha globin gene cluster located on chromosome 16 spans about 30 kb and includes seven loci: 5'- zeta - pseudozeta - mu - pseudoalpha-1 - alpha-2 - alpha-1 - theta - 3'. The alpha-2 (HBA2) and alpha-1 (HBA1) coding sequences are identical. These genes differ slightly over the 5' untranslated regions and the introns, but they differ significantly over the 3' untranslated regions. Two alpha chains plus two beta chains constitute HbA, which in normal adult life comprises about 97% of the total hemoglobin; alpha chains combine with delta chains to constitute HbA-2, which with HbF (fetal hemoglobin) makes up the remaining 3% of adult hemoglobin. Alpha thalassemias result from deletions of each of the alpha genes as well as deletions of both HBA2 and HBA1; some nondeletion alpha thalassemias have also been reported. [provided by RefSeq, Jul 2008]

HBA2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.875

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HBA2	NM_000517.6 linkuse as main transcript	c.150C>A	p.Ser50Arg	missense_variant	2/3	ENST00000251595.11	NP_000508.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
HBA2	ENST00000251595.11 linkuse as main transcript	c.150C>A	p.Ser50Arg	missense_variant	2/3	1	NM_000517.6	ENSP00000251595	P1
HBA2	ENST00000484216.1 linkuse as main transcript	c.120C>A	p.Ser40Arg	missense_variant	2/2	1		ENSP00000495899
HBA2	ENST00000482565.1 linkuse as main transcript	n.286C>A		non_coding_transcript_exon_variant	1/2	1
HBA2	ENST00000397806.1 linkuse as main transcript	c.54C>A	p.Ser18Arg	missense_variant	2/3	2		ENSP00000380908

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000120

AC:

AN:

835174

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

431174

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:

0.00000172

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1Other:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Quest Diagnostics Nichols Institute San Juan Capistrano

May 19, 2022

- -

HEMOGLOBIN SAVARIA

Other:1

other, no assertion criteria provided

literature only

OMIM

Jul 20, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.40

BayesDel_noAF

Pathogenic

0.34

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.041

.;T

Eigen

Benign

-0.032

Eigen_PC

Benign

-0.21

FATHMM_MKL

Benign

0.32

M_CAP

Pathogenic

0.55

MetaRNN

Pathogenic

0.87

D;D

MetaSVM

Pathogenic

0.81

MutationTaster

Benign

0.99

D;D

PrimateAI

Uncertain

0.60

PROVEAN

Uncertain

-2.6

D;D

REVEL

Pathogenic

0.73

Sift

Pathogenic

0.0

D;D

Sift4G

Benign

0.10

T;T

Vest4

0.68

MutPred

0.64

Gain of solvent accessibility (P = 0.0155);.;

MVP

1.0

MPC

2.3

ClinPred

0.99

GERP RS

3.2

gMVP

0.87

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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