Genetic Variant HBD:p.Gly117Arg (chr11-5232765-C-T) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2PP5

The ENST00000292901.7(HBD):c.349G>A(p.Gly117Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,422 control chromosomes in the GnomAD database, with no homozygous occurrence. 12/16 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

HBD
ENST00000292901.7 missense

Scores

Clinical Significance

Pathogenic no assertion criteria provided P:1

Conservation

PhyloP100: 0.0170

Publications

2 publications found

Variant links:

Genes affected

HBD (HGNC:4829): (hemoglobin subunit delta) The delta (HBD) and beta (HBB) genes are normally expressed in the adult: two alpha chains plus two beta chains constitute HbA, which in normal adult life comprises about 97% of the total hemoglobin. Two alpha chains plus two delta chains constitute HbA-2, which with HbF comprises the remaining 3% of adult hemoglobin. Five beta-like globin genes are found within a 45 kb cluster on chromosome 11 in the following order: 5'-epsilon--Ggamma--Agamma--delta--beta-3'. Mutations in the delta-globin gene are associated with beta-thalassemia. [provided by RefSeq, Jul 2008]

HBD Gene-Disease associations (from GenCC):

delta-beta-thalassemia
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

HBD links:

ENSG00000298932 (HGNC:):

ENSG00000298932 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 11-5232765-C-T is Pathogenic according to our data. Variant chr11-5232765-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 15068.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HBD	NM_000519.4 link	c.*199G>A		downstream_gene_variant		ENST00000650601.1	NP_000510.1	P02042A0N071

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HBD	ENST00000650601.1 link	c.*199G>A		downstream_gene_variant			NM_000519.4	ENSP00000497529.1		P02042

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1459422

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

725860

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33466

American (AMR)

AF:

0.00

AC:

AN:

44454

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26098

East Asian (EAS)

AF:

0.00

AC:

AN:

39654

South Asian (SAS)

AF:

0.0000116

AC:

AN:

85942

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52648

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111076

Other (OTH)

AF:

0.00

AC:

AN:

60318

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

delta Thalassemia

Pathogenic:1

Jan 15, 1992

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.43

BayesDel_addAF

Benign

-0.076

BayesDel_noAF

Benign

-0.35

CADD

Benign

2.5

(source)

DANN

Benign

0.70

DEOGEN2

Benign

0.0099

Eigen

Benign

-0.68

Eigen_PC

Benign

-0.83

FATHMM_MKL

Benign

0.11

LIST_S2

Benign

0.48

M_CAP

Benign

0.034

MetaRNN

Uncertain

0.64

MetaSVM

Uncertain

-0.097

PhyloP100

0.017

PROVEAN

Benign

0.42

REVEL

Benign

0.15

Sift

Uncertain

0.019

Sift4G

Uncertain

0.038

Vest4

0.24

MutPred

0.56

Loss of catalytic residue at I116 (P = 0.1316);

MVP

0.50

ClinPred

0.037

GERP RS

0.66

Mutation Taster

=25/75

disease causing (ClinVar)

(source)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over