rs35020253

chr11-5253366-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000184.3(HBG2):c.355T>C(p.Phe119Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,544 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 other (no stars). Another nucleotide change resulting in same amino acid change has been previously reported as Likely benignin UniProt.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: HBG2 NM_000184.3 missense
• Clinical Significance: other no assertion criteria provided O:1
• Conservation: PhyloP100: 0.733

Genes affected

HBG2 (HGNC:4832): (hemoglobin subunit gamma 2) 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]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.25154006).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HBG2	NM_000184.3	c.355T>C	p.Phe119Leu	missense_variant	3/3	ENST00000336906.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HBG2	ENST00000336906.6	c.355T>C	p.Phe119Leu	missense_variant	3/3	1	NM_000184.3	P1
HBG2	ENST00000380252.6	c.190T>C	p.Phe64Leu	missense_variant	3/3	3
HBG2	ENST00000444587.1			downstream_gene_variant		2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461544 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727108

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: 9.00e-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 F (CALABRIA) Other:1

other, no assertion criteria provided

literature only

OMIM

Aug 18, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.74
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.070
Cadd	Benign	7.5
Dann	Benign	0.89
Eigen	Benign	-0.91
Eigen_PC	Benign	-0.96
FATHMM_MKL	Benign	0.11	N
LIST_S2	Benign	0.78	T;T;T
M_CAP	Benign	0.056	D
MetaRNN	Benign	0.25	T;T;T
MetaSVM	Benign	-0.47	T
MutationTaster	Benign	1.0	N;N;N
Polyphen		0.0050	.;B;.
Vest4		0.29
MutPred		0.61		Gain of ubiquitination at K121 (P = 0.1679);Gain of ubiquitination at K121 (P = 0.1679);.;
MVP		0.91
ClinPred		0.12	T
GERP RS		1.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.3
Varity_R		0.37
gMVP		0.67

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: rs35020253; hg19: chr11-5274596;