15-42322000-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_198141.3(GANC):c.1273C>A(p.Leu425Ile) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: GANC NM_198141.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.00

Genes affected

GANC (HGNC:4139): (glucosidase alpha, neutral C) Glycosyl hydrolase enzymes hydrolyse the glycosidic bond between two or more carbohydrates, or between a carbohydrate and a non-carbohydrate moiety. This gene encodes a member of glycosyl hydrolases family 31. This enzyme hydrolyses terminal, non-reducing 1,4-linked alpha-D-glucose residues and releases alpha-D-glucose. This is a key enzyme in glycogen metabolism and its gene localizes to a chromosomal region (15q15) that is associated with susceptibility to diabetes. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Aug 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GANC	NM_198141.3	c.1273C>A	p.Leu425Ile	missense_variant	11/24	ENST00000318010.13
GANC	NM_001393928.1	c.1273C>A	p.Leu425Ile	missense_variant	12/25
GANC	NM_001393929.1	c.1273C>A	p.Leu425Ile	missense_variant	12/25

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GANC	ENST00000318010.13	c.1273C>A	p.Leu425Ile	missense_variant	11/24	1	NM_198141.3	P1
GANC	ENST00000567421.1	n.1246C>A		non_coding_transcript_exon_variant	10/12	5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 17, 2023

The c.1273C>A (p.L425I) alteration is located in exon 11 (coding exon 11) of the GANC gene. This alteration results from a C to A substitution at nucleotide position 1273, causing the leucine (L) at amino acid position 425 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.24
BayesDel_addAF	Uncertain	0.094	D
BayesDel_noAF	Benign	-0.10
Cadd	Benign	22
Dann	Uncertain	0.99
DEOGEN2	Uncertain	0.54	D
Eigen	Uncertain	0.37
Eigen_PC	Uncertain	0.46
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.80	T
M_CAP	Uncertain	0.11	D
MetaRNN	Uncertain	0.65	D
MetaSVM	Uncertain	0.66	D
MutationAssessor	Benign	1.7	L
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.60	T
PROVEAN	Benign	-1.1	N
REVEL	Uncertain	0.57
Sift	Benign	0.14	T
Sift4G	Benign	0.20	T
Polyphen		0.33	B
Vest4		0.38
MutPred		0.86		Gain of methylation at K429 (P = 0.0756);
MVP		0.71
MPC		0.056
ClinPred		0.94	D
GERP RS		4.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.30
gMVP		0.56

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr15-42614198;