Genetic Variant HBD:p.Thr5Ser (chr11-5234420-G-C) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_000519.4(HBD):c.14C>G(p.Thr5Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000167 in 1,612,836 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T5I) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

HBD
NM_000519.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.73

Publications

6 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:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.03507042).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000519.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HBD	NM_000519.4	MANE Select	c.14C>G	p.Thr5Ser	missense	Exon 1 of 3	NP_000510.1	P02042

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
HBD	ENST00000650601.1	MANE Select	c.14C>G	p.Thr5Ser	missense	Exon 1 of 3	ENSP00000497529.1	P02042
HBD	ENST00000643122.1		c.14C>G	p.Thr5Ser	missense	Exon 2 of 4	ENSP00000494708.1	P02042
HBD	ENST00000292901.7	TSL:3	c.14C>G	p.Thr5Ser	missense	Exon 1 of 3	ENSP00000292901.3	E9PFT6

Frequencies

GnomAD3 genomes

AF:

0.0000328

AC:

AN:

152212

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000159

AC:

AN:

251150

AF XY:

0.0000221

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000116

AC:

AN:

1460506

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

726698

show subpopulations

African (AFR)

AF:

0.000269

AC:

AN:

33438

American (AMR)

AF:

0.0000447

AC:

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86232

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1110766

Other (OTH)

AF:

0.0000829

AC:

AN:

60348

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.490

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

AF:

0.0000656

AC:

AN:

152330

Hom.:

Cov.:

AF XY:

0.0000805

AC XY:

AN XY:

74494

show subpopulations

African (AFR)

AF:

0.000217

AC:

AN:

41562

American (AMR)

AF:

0.0000653

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68034

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000302

ExAC

AF:

0.0000330

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.081

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.16

CADD

Benign

5.1

(source)

DANN

Benign

0.91

DEOGEN2

Benign

0.098

Eigen

Benign

-0.72

Eigen_PC

Benign

-0.72

FATHMM_MKL

Benign

0.61

LIST_S2

Benign

0.79

M_CAP

Benign

0.072

MetaRNN

Benign

0.035

MetaSVM

Benign

-0.50

MutationAssessor

Benign

0.45

PhyloP100

1.7

PrimateAI

Benign

0.44

PROVEAN

Benign

-2.1

REVEL

Uncertain

0.31

Sift

Benign

0.13

Sift4G

Benign

0.43

Polyphen

0.0060

Vest4

0.17

MutPred

0.38

Gain of disorder (P = 0.0962)

MVP

0.78

MPC

0.012

ClinPred

0.016

GERP RS

1.6

PromoterAI

-0.015

Neutral

(source)

Varity_R

0.30

gMVP

0.78

Mutation Taster

=5/95

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over