rs5751348

Variant names:

• chr22-42717787-C-A
• rs5751348
• NM_017436.7:c.-188+3010G>T

Your query was ambiguous. Multiple possible variants found:

• chr22-42717787-C-A
• chr22-42717787-C-G

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_017436.7(A4GALT):​c.-188+3010G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.417 in 151,992 control chromosomes in the GnomAD database, including 15,230 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.42 (15230 hom., cov: 32)
• Consequence: A4GALT NM_017436.7 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.75
• Publications: 20 publications found

Genes affected

A4GALT (HGNC:18149): (alpha 1,4-galactosyltransferase (P1PK blood group)) The protein encoded by this gene catalyzes the transfer of galactose to lactosylceramide to form globotriaosylceramide, which has been identified as the P(k) antigen of the P blood group system. This protein, a type II membrane protein found in the Golgi, is also required for the synthesis of the bacterial verotoxins receptor. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Dec 2015]

CYB5R3 (HGNC:2873): (cytochrome b5 reductase 3) This gene encodes cytochrome b5 reductase, which includes a membrane-bound form in somatic cells (anchored in the endoplasmic reticulum, mitochondrial and other membranes) and a soluble form in erythrocytes. The membrane-bound form exists mainly on the cytoplasmic side of the endoplasmic reticulum and functions in desaturation and elongation of fatty acids, in cholesterol biosynthesis, and in drug metabolism. The erythrocyte form is located in a soluble fraction of circulating erythrocytes and is involved in methemoglobin reduction. The membrane-bound form has both membrane-binding and catalytic domains, while the soluble form has only the catalytic domain. Alternate splicing results in multiple transcript variants. Mutations in this gene cause methemoglobinemias. [provided by RefSeq, Jan 2010]

CYB5R3 Gene-Disease associations (from GenCC):

• methemoglobinemia

  Inheritance: AR Classification: DEFINITIVE Submitted by: Illumina
• methemoglobinemia due to deficiency of methemoglobin reductase

  Inheritance: AR Classification: STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• hereditary methemoglobinemia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.801 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
A4GALT	NM_017436.7	c.-188+3010G>T		intron_variant	Intron 1 of 2	ENST00000642412.2	NP_059132.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
A4GALT	ENST00000642412.2	c.-188+3010G>T		intron_variant	Intron 1 of 2		NM_017436.7	ENSP00000494127.1

Frequencies

GnomAD3 genomes AF: 0.418 AC: 63433 AN: 151874 Hom.: 15235 Cov.: 32

Gnomad AFR AF: 0.183

Gnomad AMI AF: 0.415

Gnomad AMR AF: 0.462

Gnomad ASJ AF: 0.496

Gnomad EAS AF: 0.823

Gnomad SAS AF: 0.553

Gnomad FIN AF: 0.526

Gnomad MID AF: 0.525

Gnomad NFE AF: 0.488

Gnomad OTH AF: 0.455

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.417 AC: 63438 AN: 151992 Hom.: 15230 Cov.: 32 AF XY: 0.425 AC XY: 31534 AN XY: 74280

African (AFR) AF: 0.183 AC: 7576 AN: 41458

American (AMR) AF: 0.462 AC: 7050 AN: 15258

Ashkenazi Jewish (ASJ) AF: 0.496 AC: 1721 AN: 3470

East Asian (EAS) AF: 0.822 AC: 4248 AN: 5168

South Asian (SAS) AF: 0.552 AC: 2663 AN: 4822

European-Finnish (FIN) AF: 0.526 AC: 5550 AN: 10548

Middle Eastern (MID) AF: 0.531 AC: 156 AN: 294

European-Non Finnish (NFE) AF: 0.488 AC: 33131 AN: 67960

Other (OTH) AF: 0.459 AC: 966 AN: 2106

Alfa AF: 0.467 Hom.: 9210

Bravo AF: 0.401

Asia WGS AF: 0.612 AC: 2129 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	6.8
DANN	Benign	0.47
PhyloP100		1.7

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs5751348; hg19: chr22-43113793;