chr12-101770429-G-C

Variant names:

• chr12-101770429-G-C
• NM_024312.5:c.1090C>G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_024312.5(GNPTAB):​c.1090C>G​(p.Arg364Gly) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,460,932 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: GNPTAB NM_024312.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.73

Genes affected

GNPTAB (HGNC:29670): (N-acetylglucosamine-1-phosphate transferase subunits alpha and beta) This gene encodes two of three subunit types of the membrane-bound enzyme N-acetylglucosamine-1-phosphotransferase, a heterohexameric complex composed of two alpha, two beta, and two gamma subunits. The encoded protein is proteolytically cleaved at the Lys928-Asp929 bond to yield mature alpha and beta polypeptides while the gamma subunits are the product of a distinct gene (GeneID 84572). In the Golgi apparatus, the heterohexameric complex catalyzes the first step in the synthesis of mannose 6-phosphate recognition markers on certain oligosaccharides of newly synthesized lysosomal enzymes. These recognition markers are essential for appropriate trafficking of lysosomal enzymes. Mutations in this gene have been associated with both mucolipidosis II and mucolipidosis IIIA.[provided by RefSeq, May 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.86

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GNPTAB	NM_024312.5	c.1090C>G	p.Arg364Gly	missense_variant	Exon 9 of 21	ENST00000299314.12	NP_077288.2
GNPTAB	XM_011538731.3	c.1009C>G	p.Arg337Gly	missense_variant	Exon 9 of 21		XP_011537033.1
GNPTAB	XM_006719593.4	c.1090C>G	p.Arg364Gly	missense_variant	Exon 9 of 19		XP_006719656.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GNPTAB	ENST00000299314.12	c.1090C>G	p.Arg364Gly	missense_variant	Exon 9 of 21	1	NM_024312.5	ENSP00000299314.7
GNPTAB	ENST00000549940.5	c.1090C>G	p.Arg364Gly	missense_variant	Exon 9 of 11	1		ENSP00000449150.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1460932 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 726876

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.91
BayesDel_addAF	Pathogenic	0.45	D
BayesDel_noAF	Pathogenic	0.41
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.90	D;.
Eigen	Uncertain	0.47
Eigen_PC	Uncertain	0.47
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.96	D;D
M_CAP	Uncertain	0.21	D
MetaRNN	Pathogenic	0.86	D;D
MetaSVM	Uncertain	0.63	D
MutationAssessor	Benign	1.8	L;L
PrimateAI	Uncertain	0.68	T
PROVEAN	Pathogenic	-6.0	D;D
REVEL	Pathogenic	0.77
Sift	Uncertain	0.0020	D;D
Sift4G	Uncertain	0.0030	D;T
Polyphen		0.88	P;P
Vest4		0.86
MutPred		0.55		Gain of loop (P = 0.1069);Gain of loop (P = 0.1069);
MVP		0.90
MPC		0.88
ClinPred		0.99	D
GERP RS		3.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.87
gMVP		0.84

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: chr12-102164207;