11-5225485-T-C

Variant names:

• chr11-5225485-T-C
• rs33985472
• NM_000518.5:c.*113A>G

Variant summary

Our verdict is Pathogenic. The variant received 13 ACMG points: 14P and 1B. PS3 PM2 PP5_Very_Strong BP4

The NM_000518.5(HBB):​c.*113A>G variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000117 in 855,894 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 (★★). ClinVar reports functional evidence for this variant: "SCV000917508: Analysis of RNA derived from peripheral blood of patients carrying this mutation revealed several species of extended transcripts, indicating that the mutation interferes with mRNA cleavage (Rund_1991)." and additional evidence is available in ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000012 (0 hom.)
• Consequence: HBB NM_000518.5 3_prime_UTR
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:4 O:1
• Conservation: PhyloP100: 1.29
• Publications: 6 publications found

Genes affected

HBB (HGNC:4827): (hemoglobin subunit beta) The alpha (HBA) and beta (HBB) loci determine the structure of the 2 types of polypeptide chains in adult hemoglobin, Hb A. The normal adult hemoglobin tetramer consists of two alpha chains and two beta chains. Mutant beta globin causes sickle cell anemia. Absence of beta chain causes beta-zero-thalassemia. Reduced amounts of detectable beta globin causes beta-plus-thalassemia. The order of the genes in the beta-globin cluster is 5'-epsilon -- gamma-G -- gamma-A -- delta -- beta--3'. [provided by RefSeq, Jul 2008]

HBB Gene-Disease associations (from GenCC):

• dominant beta-thalassemia

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, Orphanet
• erythrocytosis, familial, 6

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, ClinGen
• hemoglobin M disease

  Inheritance: AD Classification: DEFINITIVE, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, ClinGen, Orphanet
• unstable hemoglobin disease

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• beta thalassemia

  Inheritance: AR Classification: DEFINITIVE Submitted by: Myriad Women’s Health
• beta-thalassemia HBB/LCRB

  Inheritance: AR, SD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen
• sickle cell disease and related diseases

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Heinz body anemia

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• sickle cell disease

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
• hereditary persistence of fetal hemoglobin-beta-thalassemia syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• beta-thalassemia intermedia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• beta-thalassemia major

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

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• hemoglobin C disease

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• hemoglobin C-beta-thalassemia syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• hemoglobin E disease

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• hemoglobin E-beta-thalassemia syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• hereditary persistence of fetal hemoglobin-sickle cell disease syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• sickle cell-beta-thalassemia disease syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• sickle cell-hemoglobin c disease syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• sickle cell-hemoglobin d disease syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• sickle cell-hemoglobin E disease syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000298932 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 13 ACMG points.

• PS3: PS3 evidence extracted from ClinVar submissions: SCV000917508: Analysis of RNA derived from peripheral blood of patients carrying this mutation revealed several species of extended transcripts, indicating that the mutation interferes with mRNA cleavage (Rund_1991).; SCV003439600: Studies have shown that this variant alters HBB gene expression (PMID: 1374896).
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 11-5225485-T-C is Pathogenic according to our data. Variant chr11-5225485-T-C is described in ClinVar as Pathogenic. ClinVar VariationId is 15473.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.57). . Strength limited to SUPPORTING due to the PP5.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000518.5. 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
	HBB	NM_000518.5	MANE Select	c.*113A>G		3_prime_UTR	Exon 3 of 3	NP_000509.1	D9YZU5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HBB	ENST00000335295.4	TSL:1 MANE Select	c.*113A>G		3_prime_UTR	Exon 3 of 3	ENSP00000333994.3	P68871
	HBB	ENST00000647020.1		c.*113A>G		3_prime_UTR	Exon 3 of 3	ENSP00000494175.1	P68871
	HBB	ENST00000883533.1		c.*113A>G		3_prime_UTR	Exon 4 of 4	ENSP00000553592.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000117 AC: 1 AN: 855894 Hom.: 0 Cov.: 12 AF XY: 0.00000222 AC XY: 1 AN XY: 449718

African (AFR) AF: 0.00 AC: 0 AN: 21422

American (AMR) AF: 0.00 AC: 0 AN: 41552

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 21898

East Asian (EAS) AF: 0.00 AC: 0 AN: 36912

South Asian (SAS) AF: 0.00 AC: 0 AN: 72530

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50870

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3532

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 566896

Other (OTH) AF: 0.0000248 AC: 1 AN: 40282

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
1	-	-	beta Thalassemia (2)
1	-	-	Beta-plus-thalassemia (1)
1	-	-	Beta-thalassemia HBB/LCRB (1)
1	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.57
CADD	Benign	20
DANN	Benign	0.80
PhyloP100		1.3
Mutation Taster		=32/68	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs33985472; hg19: chr11-5246715;