9-133256074-G-T

Variant names:

• chr9-133256074-G-T
• rs8176741
• ENST00000611156.4:c.654C>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The ENST00000611156.4(ABO):​c.654C>A​(p.His218Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000696 in 1,436,986 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 8/11 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. H218H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.0e-7 (0 hom.)
• Consequence: ABO ENST00000611156.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.194
• Publications: 0 publications found

Genes affected

ABO (HGNC:79): (ABO, alpha 1-3-N-acetylgalactosaminyltransferase and alpha 1-3-galactosyltransferase) This gene encodes proteins related to the first discovered blood group system, ABO. Variation in the ABO gene (chromosome 9q34.2) is the basis of the ABO blood group, thus the presence of an allele determines the blood group in an individual. The 'O' blood group is caused by a deletion of guanine-258 near the N-terminus of the protein which results in a frameshift and translation of an almost entirely different protein. Individuals with the A, B, and AB alleles express glycosyltransferase activities that convert the H antigen into the A or B antigen. Other minor alleles have been found for this gene. [provided by RefSeq, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.072687685).

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000611156.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ABO	NR_198898.1		n.668C>A		non_coding_transcript_exon	Exon 7 of 7

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ABO	ENST00000611156.4	TSL:5	c.654C>A	p.His218Gln	missense	Exon 8 of 8	ENSP00000483265.1
	ABO	ENST00000453660.4	TSL:1	n.686C>A		non_coding_transcript_exon	Exon 7 of 7
	ABO	ENST00000538324.2	TSL:5	c.654C>A	p.His218Gln	missense	Exon 8 of 9	ENSP00000483018.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.96e-7 AC: 1 AN: 1436986 Hom.: 0 Cov.: 74 AF XY: 0.00000140 AC XY: 1 AN XY: 713026

African (AFR) AF: 0.00 AC: 0 AN: 32782

American (AMR) AF: 0.00 AC: 0 AN: 39978

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25596

East Asian (EAS) AF: 0.00 AC: 0 AN: 38002

South Asian (SAS) AF: 0.00 AC: 0 AN: 83114

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51528

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5736

European-Non Finnish (NFE) AF: 9.08e-7 AC: 1 AN: 1100772

Other (OTH) AF: 0.00 AC: 0 AN: 59478

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.26
BayesDel_addAF	Uncertain	0.057	T
BayesDel_noAF	Benign	-0.16
CADD	Benign	16
DANN	Benign	0.73
DEOGEN2	Benign	0.14	T
FATHMM_MKL	Benign	0.059	N
LIST_S2	Benign	0.59	T
MetaRNN	Benign	0.073	T
PhyloP100		-0.19
PrimateAI	Benign	0.44	T
Sift4G	Benign	0.079	T
Vest4		0.17
MVP		0.030
GERP RS		-4.2
gMVP		0.40

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: rs8176741; hg19: chr9-136131461;