NM_001128227.3:c.1338C>T

Variant names:

• chr9-36227284-G-A
• rs140784655
• NM_001128227.3:c.1338C>T

Variant summary

Our verdict is Benign. The variant received -17 ACMG points: 0P and 17B. BP4_Strong BP6_Very_Strong BP7 BS1

The NM_001128227.3(GNE):​c.1338C>T​(p.Gly446Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000183 in 1,613,298 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. G446G) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.00056 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00014 (0 hom.)
• Consequence: GNE NM_001128227.3 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:4
• Conservation: PhyloP100: -2.44
• Publications: 0 publications found

Genes affected

GNE (HGNC:23657): (glucosamine (UDP-N-acetyl)-2-epimerase/N-acetylmannosamine kinase) The protein encoded by this gene is a bifunctional enzyme that initiates and regulates the biosynthesis of N-acetylneuraminic acid (NeuAc), a precursor of sialic acids. It is a rate-limiting enzyme in the sialic acid biosynthetic pathway. Sialic acid modification of cell surface molecules is crucial for their function in many biologic processes, including cell adhesion and signal transduction. Differential sialylation of cell surface molecules is also implicated in the tumorigenicity and metastatic behavior of malignant cells. Mutations in this gene are associated with sialuria, autosomal recessive inclusion body myopathy, and Nonaka myopathy. Alternative splicing of this gene results in transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]

CLTA (HGNC:2090): (clathrin light chain A) Clathrin is a large, soluble protein composed of heavy and light chains. It functions as the main structural component of the lattice-type cytoplasmic face of coated pits and vesicles which entrap specific macromolecules during receptor-mediated endocytosis. This gene encodes one of two clathrin light chain proteins which are believed to function as regulatory elements. Alternative splicing results in multiple transcript variants. Related pseudogenes have been identified on chromosomes 8 and 12. [provided by RefSeq, May 2010]

ACMG classification

Our verdict: Benign. The variant received -17 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.67).
• BP6: Variant 9-36227284-G-A is Benign according to our data. Variant chr9-36227284-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 284782.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-2.44 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000558 (85/152204) while in subpopulation AFR AF = 0.00161 (67/41538). AF 95% confidence interval is 0.0013. There are 0 homozygotes in GnomAd4. There are 39 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001128227.3. 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
	GNE	NM_001128227.3	MANE Plus Clinical	c.1338C>T	p.Gly446Gly	synonymous	Exon 7 of 12	NP_001121699.1	Q9Y223-2
	GNE	NM_005476.7	MANE Select	c.1245C>T	p.Gly415Gly	synonymous	Exon 7 of 12	NP_005467.1	Q9Y223-1
	GNE	NM_001374797.1		c.1092C>T	p.Gly364Gly	synonymous	Exon 6 of 11	NP_001361726.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GNE	ENST00000396594.8	TSL:1 MANE Plus Clinical	c.1338C>T	p.Gly446Gly	synonymous	Exon 7 of 12	ENSP00000379839.3	Q9Y223-2
	GNE	ENST00000642385.2	MANE Select	c.1245C>T	p.Gly415Gly	synonymous	Exon 7 of 12	ENSP00000494141.2	Q9Y223-1
	GNE	ENST00000543356.7	TSL:1	c.1068C>T	p.Gly356Gly	synonymous	Exon 6 of 11	ENSP00000437765.3	A0A7I2SU25

Frequencies

GnomAD3 genomes AF: 0.000552 AC: 84 AN: 152086 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00159

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000459

Gnomad ASJ AF: 0.00144

Gnomad EAS AF: 0.000386

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.000478

GnomAD2 exomes AF: 0.000290 AC: 73 AN: 251446 AF XY: 0.000228

Gnomad AFR exome AF: 0.00178

Gnomad AMR exome AF: 0.000347

Gnomad ASJ exome AF: 0.00119

Gnomad EAS exome AF: 0.000217

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000114

Gnomad OTH exome AF: 0.000326

GnomAD4 exome AF: 0.000144 AC: 210 AN: 1461094 Hom.: 0 Cov.: 31 AF XY: 0.000149 AC XY: 108 AN XY: 726922

African (AFR) AF: 0.00170 AC: 57 AN: 33466

American (AMR) AF: 0.000447 AC: 20 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00126 AC: 33 AN: 26128

East Asian (EAS) AF: 0.000126 AC: 5 AN: 39696

South Asian (SAS) AF: 0.0000464 AC: 4 AN: 86232

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00104 AC: 6 AN: 5766

European-Non Finnish (NFE) AF: 0.0000405 AC: 45 AN: 1111306

Other (OTH) AF: 0.000663 AC: 40 AN: 60362

GnomAD4 genome AF: 0.000558 AC: 85 AN: 152204 Hom.: 0 Cov.: 32 AF XY: 0.000524 AC XY: 39 AN XY: 74424

African (AFR) AF: 0.00161 AC: 67 AN: 41538

American (AMR) AF: 0.000458 AC: 7 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.00144 AC: 5 AN: 3472

East Asian (EAS) AF: 0.000387 AC: 2 AN: 5174

South Asian (SAS) AF: 0.00 AC: 0 AN: 4820

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10602

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000441 AC: 3 AN: 67998

Other (OTH) AF: 0.000473 AC: 1 AN: 2112

Alfa AF: 0.000409 Hom.: 0

Bravo AF: 0.000797

Asia WGS AF: 0.000866 AC: 3 AN: 3478

EpiCase AF: 0.000164

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	2	not provided (2)
-	-	1	not specified (1)
-	-	1	Sialuria;C1853926:GNE myopathy (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.67
CADD	Benign	1.5
DANN	Benign	0.82
PhyloP100		-2.4
Mutation Taster		=98/2	polymorphism

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: rs140784655; hg19: chr9-36227281;