X-2830251-C-T

Variant names:

• chrX-2830251-C-T
• rs6641656
• NM_001079855.2:c.7+56C>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001079855.2(GYG2):​c.7+56C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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: not found (cov: 23)
  • Exomes 𝑓: 0.0 (0 hom. 0 hem.)
  • Failed GnomAD Quality Control
• Consequence: GYG2 NM_001079855.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.882
• Publications: 6 publications found

Genes affected

GYG2 (HGNC:4700): (glycogenin 2) This gene encodes a member of the the glycogenin family. Glycogenin is a self-glucosylating protein involved in the initiation reactions of glycogen biosynthesis. A gene on chromosome 3 encodes the muscle glycogenin and this X-linked gene encodes the glycogenin mainly present in liver; both are involved in blood glucose homeostasis. This gene has a short version on chromosome Y, which is 3' truncated and can not make a functional protein. Multiple alternatively spliced transcript variants encoding different isoforms have been identified.[provided by RefSeq, May 2010]

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001079855.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GYG2	NM_001079855.2	MANE Select	c.7+56C>T		intron	N/A	NP_001073324.1	O15488-2
	GYG2	NM_003918.3		c.7+56C>T		intron	N/A	NP_003909.2	O15488-1
	GYG2	NM_001184702.2		c.7+56C>T		intron	N/A	NP_001171631.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GYG2	ENST00000398806.8	TSL:1 MANE Select	c.7+56C>T		intron	N/A	ENSP00000381786.3	O15488-2
	GYG2	ENST00000381163.7	TSL:1	c.7+56C>T		intron	N/A	ENSP00000370555.3	O15488-1
	GYG2	ENST00000958345.1		c.7+56C>T		intron	N/A	ENSP00000628404.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 988114 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 294286

African (AFR) AF: 0.00 AC: 0 AN: 24524

American (AMR) AF: 0.00 AC: 0 AN: 34734

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 18690

East Asian (EAS) AF: 0.00 AC: 0 AN: 29653

South Asian (SAS) AF: 0.00 AC: 0 AN: 51583

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40339

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3805

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 742409

Other (OTH) AF: 0.00 AC: 0 AN: 42377

GnomAD4 genome Cov.: 23

Alfa AF: 0.00 Hom.: 5877

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	3.0
DANN	Benign	0.88
PhyloP100		-0.88
PromoterAI		0.014	Neutral

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: rs6641656; hg19: chrX-2748292;