rs34460332

Positions:

• chr11-5234360-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_000519.4(HBD):​c.74G>A​(p.Gly25Asp) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,660 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 other (no stars). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely benign in UniProt.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: HBD NM_000519.4 missense
• Clinical Significance: other no assertion criteria provided O:1
• Conservation: PhyloP100: 5.25

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]

ACMG classification

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, 0.916

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HBD	NM_000519.4	c.74G>A	p.Gly25Asp	missense_variant	1/3	ENST00000650601.1	NP_000510.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HBD	ENST00000650601.1	c.74G>A	p.Gly25Asp	missense_variant	1/3		NM_000519.4	ENSP00000497529.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461660 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 727138

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: other

Submissions summary: Other:1

Revision: no assertion criteria provided

Submissions by phenotype

HEMOGLOBIN A(2) VICTORIA Other:1

other, no assertion criteria provided

literature only

OMIM

Dec 12, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.53	D
BayesDel_noAF	Pathogenic	0.52
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.25	T;T;T;T;.;T
Eigen	Uncertain	0.62
Eigen_PC	Uncertain	0.41
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.89	D;.;.;D;D;D
M_CAP	Pathogenic	0.56	D
MetaRNN	Pathogenic	0.92	D;D;D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.5	.;H;H;H;.;.
PrimateAI	Uncertain	0.60	T
PROVEAN	Pathogenic	-5.9	D;.;D;.;D;D
REVEL	Pathogenic	0.79
Sift	Pathogenic	0.0	D;.;D;.;D;D
Sift4G	Pathogenic	0.0	D;.;D;.;D;.
Polyphen		1.0	.;D;D;D;.;.
Vest4		0.88
MutPred		0.69		Loss of catalytic residue at V24 (P = 0.2763);Loss of catalytic residue at V24 (P = 0.2763);Loss of catalytic residue at V24 (P = 0.2763);Loss of catalytic residue at V24 (P = 0.2763);Loss of catalytic residue at V24 (P = 0.2763);Loss of catalytic residue at V24 (P = 0.2763);
MVP		0.99
MPC		0.088
ClinPred		1.0	D
GERP RS		2.7
Varity_R		0.97
gMVP		0.93

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.47		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.47		Position offset: -2

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

Publications

LitVar

Other links and lift over

dbSNP: rs34460332; hg19: chr11-5255590; COSMIC: COSV104627201; COSMIC: COSV104627201;