NM_133642.5:c.788-27261T>C

Variant names:

• chr22-33459526-A-G
• rs7289701
• NM_133642.5:c.788-27261T>C

Variant summary

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

The NM_133642.5(LARGE1):​c.788-27261T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0309 in 145,670 control chromosomes in the GnomAD database, including 179 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 0.031 (179 hom., cov: 29)
• Consequence: LARGE1 NM_133642.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0750

Genes affected

LARGE1 (HGNC:6511): (LARGE xylosyl- and glucuronyltransferase 1) This gene encodes a member of the N-acetylglucosaminyltransferase gene family. It encodes a glycosyltransferase which participates in glycosylation of alpha-dystroglycan, and may carry out the synthesis of glycoprotein and glycosphingolipid sugar chains. It may also be involved in the addition of a repeated disaccharide unit. The protein encoded by this gene is the glycotransferase that adds the final xylose and glucuronic acid to alpha-dystroglycan and thereby allows alpha-dystroglycan to bind ligands including laminin 211 and neurexin. Mutations in this gene cause several forms of congenital muscular dystrophy characterized by cognitive disability and abnormal glycosylation of alpha-dystroglycan. Alternative splicing of this gene results in multiple transcript variants that encode the same protein. [provided by RefSeq, May 2018]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.94).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0963 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LARGE1	NM_133642.5	c.788-27261T>C		intron_variant	Intron 6 of 14	ENST00000397394.8	NP_598397.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LARGE1	ENST00000397394.8	c.788-27261T>C		intron_variant	Intron 6 of 14	5	NM_133642.5	ENSP00000380549.2

Frequencies

GnomAD3 genomes AF: 0.0309 AC: 4497 AN: 145572 Hom.: 180 Cov.: 29

Gnomad AFR AF: 0.0992

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0123

Gnomad ASJ AF: 0.00522

Gnomad EAS AF: 0.000202

Gnomad SAS AF: 0.0221

Gnomad FIN AF: 0.00121

Gnomad MID AF: 0.00654

Gnomad NFE AF: 0.00438

Gnomad OTH AF: 0.0211

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

GnomAD4 genome AF: 0.0309 AC: 4496 AN: 145670 Hom.: 179 Cov.: 29 AF XY: 0.0306 AC XY: 2150 AN XY: 70322

Gnomad4 AFR AF: 0.0989

Gnomad4 AMR AF: 0.0122

Gnomad4 ASJ AF: 0.00522

Gnomad4 EAS AF: 0.000202

Gnomad4 SAS AF: 0.0219

Gnomad4 FIN AF: 0.00121

Gnomad4 NFE AF: 0.00437

Gnomad4 OTH AF: 0.0209

Alfa AF: 0.0171 Hom.: 11

Bravo AF: 0.0332

Asia WGS AF: 0.00693 AC: 24 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.94
CADD	Benign	2.5
DANN	Benign	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: rs7289701; hg19: chr22-33855512;