chr22-24599789-C-A

Position:

• chr22-24599789-C-A

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_013430.3(GGT1):​c.-428-8165C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.384 in 151,964 control chromosomes in the GnomAD database, including 11,461 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 0.38 (11461 hom., cov: 33)
• Consequence: GGT1 NM_013430.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -2.10

Genes affected

ENSG00000286070 (HGNC:):

GGT1 (HGNC:4250): (gamma-glutamyltransferase 1) The enzyme encoded by this gene is a type I gamma-glutamyltransferase that catalyzes the transfer of the glutamyl moiety of glutathione to a variety of amino acids and dipeptide acceptors. The enzyme is composed of a heavy chain and a light chain, which are derived from a single precursor protein. It is expressed in tissues involved in absorption and secretion and may contribute to the etiology of diabetes and other metabolic disorders. Multiple alternatively spliced variants have been identified. There are a number of related genes present on chromosomes 20 and 22, and putative pseudogenes for this gene on chromosomes 2, 13, and 22. [provided by RefSeq, Jan 2014]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.93).
• BA1: GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.442 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GGT1	NM_013430.3	c.-428-8165C>A		intron_variant			NP_038347.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ENSG00000286070	ENST00000652248.1	n.*168-8165C>A		intron_variant				ENSP00000499210.1

Frequencies

GnomAD3 genomes AF: 0.384 AC: 58382 AN: 151848 Hom.: 11456 Cov.: 33

Gnomad AFR AF: 0.421

Gnomad AMI AF: 0.269

Gnomad AMR AF: 0.451

Gnomad ASJ AF: 0.441

Gnomad EAS AF: 0.368

Gnomad SAS AF: 0.270

Gnomad FIN AF: 0.318

Gnomad MID AF: 0.516

Gnomad NFE AF: 0.364

Gnomad OTH AF: 0.407

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

GnomAD4 genome AF: 0.384 AC: 58426 AN: 151964 Hom.: 11461 Cov.: 33 AF XY: 0.380 AC XY: 28244 AN XY: 74280

Gnomad4 AFR AF: 0.421

Gnomad4 AMR AF: 0.451

Gnomad4 ASJ AF: 0.441

Gnomad4 EAS AF: 0.369

Gnomad4 SAS AF: 0.270

Gnomad4 FIN AF: 0.318

Gnomad4 NFE AF: 0.364

Gnomad4 OTH AF: 0.404

Alfa AF: 0.261 Hom.: 732

Bravo AF: 0.399

Asia WGS AF: 0.338 AC: 1172 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.93
CADD	Benign	0.023
DANN	Benign	0.55

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: rs2006227; hg19: chr22-24995756;