NM_000559.3:c.76G>A

Variant names:

• chr11-5249729-C-T
• rs35957832
• NM_000559.3:c.76G>A

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP6_Moderate

The NM_000559.3(HBG1):​c.76G>A​(p.Gly26Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. Variant has been reported in ClinVar as Likely benign (★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar.

• Frequency:
  • Genomes: not found (cov: 4)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: HBG1 NM_000559.3 missense
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.0440
• Publications: 2 publications found

Genes affected

HBG1 (HGNC:4831): (hemoglobin subunit gamma 1) The gamma globin genes (HBG1 and HBG2) are normally expressed in the fetal liver, spleen and bone marrow. Two gamma chains together with two alpha chains constitute fetal hemoglobin (HbF) which is normally replaced by adult hemoglobin (HbA) at birth. In some beta-thalassemias and related conditions, gamma chain production continues into adulthood. The two types of gamma chains differ at residue 136 where glycine is found in the G-gamma product (HBG2) and alanine is found in the A-gamma product (HBG1). The former is predominant at birth. 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]

HBG1 Gene-Disease associations (from GenCC):

• hereditary persistence of fetal hemoglobin-beta-thalassemia syndrome

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

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

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000284931 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• BP6: Variant 11-5249729-C-T is Benign according to our data. Variant chr11-5249729-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 1330868.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HBG1	NM_000559.3	c.76G>A	p.Gly26Arg	missense_variant	Exon 1 of 3	ENST00000330597.5	NP_000550.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HBG1	ENST00000330597.5	c.76G>A	p.Gly26Arg	missense_variant	Exon 1 of 3	1	NM_000559.3	ENSP00000327431.4
ENSG00000284931	ENST00000642908.1	c.316-1242G>A		intron_variant	Intron 2 of 2			ENSP00000495346.1

Frequencies

GnomAD3 genomes Cov.: 4

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 337508 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 178190

African (AFR) AF: 0.00 AC: 0 AN: 9762

American (AMR) AF: 0.00 AC: 0 AN: 16664

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 10392

East Asian (EAS) AF: 0.00 AC: 0 AN: 21082

South Asian (SAS) AF: 0.00 AC: 0 AN: 38412

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 21948

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 1410

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 198932

Other (OTH) AF: 0.00 AC: 0 AN: 18906

GnomAD4 genome Cov.: 4

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000189

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Fetal hemoglobin quantitative trait locus 1 Benign:1

Oct 29, 2021

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.58
BayesDel_addAF	Pathogenic	0.32	D
BayesDel_noAF	Pathogenic	0.22
CADD	Benign	21
DANN	Uncertain	1.0
Eigen	Benign	0.13
Eigen_PC	Benign	-0.071
FATHMM_MKL	Benign	0.31	N
LIST_S2	Uncertain	0.92	D
M_CAP	Benign	0.072	D
MetaRNN	Uncertain	0.72	D
MetaSVM	Uncertain	0.67	D
PhyloP100		0.044
PrimateAI	Uncertain	0.53	T
PROVEAN	Uncertain	-4.1	D
REVEL	Pathogenic	0.66
Sift	Pathogenic	0.0	D
Sift4G	Benign	0.14	T
Polyphen		1.0	D
Vest4		0.15
MutPred		0.79		Gain of phosphorylation at T28 (P = 0.0847);
MVP		0.96
MPC		2.3
ClinPred		0.99	D
GERP RS		2.8
PromoterAI		0.0081	Neutral
gMVP		0.58
Mutation Taster		=35/65	disease causing

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: rs35957832; hg19: chr11-5270959;