rs35661168

Positions:

• chr11-5234559-T-A
• chr11-5234559-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP5 BP4

The ENST00000643122.1(HBD):​c.-28-98A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000168 in 596,456 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 Pathogenic (no stars). There are indicators that this mutation may affect the branch point..

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000017 (0 hom.)
• Consequence: HBD ENST00000643122.1 intron
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: -3.12

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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 11-5234559-T-A is Pathogenic according to our data. Variant chr11-5234559-T-A is described in ClinVar as [Pathogenic]. Clinvar id is 15085.Status of the report is no_assertion_criteria_provided, 0 stars.
• BP4: This place is a probable branch point but rather VUS (scored 4 / 10). Computational evidence support a benign effect (BayesDel_noAF=-0.65). . Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HBD	ENST00000429817.1	c.-97-29A>T		intron_variant		5		ENSP00000393810
HBD	ENST00000643122.1	c.-28-98A>T		intron_variant				ENSP00000494708	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000168 AC: 1 AN: 596456 Hom.: 0 Cov.: 6 AF XY: 0.00000310 AC XY: 1 AN XY: 322524

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: 0.00000290

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

delta Thalassemia Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Nov 01, 2002

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.65
CADD	Benign	0.74
DANN	Benign	0.74
BranchPoint Hunter		4.0

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

Other links and lift over

dbSNP: rs35661168; hg19: chr11-5255789;