chr16-69321169-C-G

Variant names:

• chr16-69321169-C-G
• NM_013245.3:c.970C>G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_013245.3(VPS4A):​c.970C>G​(p.Arg324Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000014 in 1,425,722 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R324W) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: VPS4A NM_013245.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.99

Genes affected

VPS4A (HGNC:13488): (vacuolar protein sorting 4 homolog A) The protein encoded by this gene is a member of the AAA protein family (ATPases associated with diverse cellular activities), and is the homolog of the yeast Vps4 protein. In humans, two paralogs of the yeast protein have been identified. The former share a high degree of aa sequence similarity with each other, and also with yeast Vps4 and mouse Skd1 proteins. The mouse Skd1 (suppressor of K+ transport defect 1) has been shown to be really an yeast Vps4 ortholog. Functional studies indicate that both human paralogs associate with the endosomal compartments, and are involved in intracellular protein trafficking, similar to Vps4 protein in yeast. The gene encoding this paralog has been mapped to chromosome 16; the gene for the other resides on chromosome 18. [provided by RefSeq, Jul 2008]

ENSG00000260914 (HGNC:):

COG8 (HGNC:18623): (component of oligomeric golgi complex 8) This gene encodes a protein that is a component of the conserved oligomeric Golgi (COG) complex, a multiprotein complex that plays a structural role in the Golgi apparatus, and is involved in intracellular membrane trafficking and glycoprotein modification. Mutations in this gene cause congenital disorder of glycosylation, type IIh, a disease that is characterized by under-glycosylated serum proteins, and whose symptoms include severe psychomotor retardation, failure to thrive, seizures, and dairy and wheat product intolerance. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.36186337).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
VPS4A	NM_013245.3	c.970C>G	p.Arg324Gly	missense_variant	Exon 9 of 11	ENST00000254950.13	NP_037377.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
VPS4A	ENST00000254950.13	c.970C>G	p.Arg324Gly	missense_variant	Exon 9 of 11	1	NM_013245.3	ENSP00000254950.11
ENSG00000260914	ENST00000570054.3	c.1042C>G	p.Arg348Gly	missense_variant	Exon 9 of 10	5		ENSP00000461295.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000140 AC: 2 AN: 1425722 Hom.: 0 Cov.: 33 AF XY: 0.00000283 AC XY: 2 AN XY: 705728

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000268

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.14e-7

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	Benign	0.14
BayesDel_addAF	Uncertain	0.10	D
BayesDel_noAF	Benign	-0.090
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.17	.;T
Eigen	Benign	-0.30
Eigen_PC	Benign	-0.18
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Uncertain	0.95	D;D
M_CAP	Uncertain	0.19	D
MetaRNN	Benign	0.36	T;T
MetaSVM	Uncertain	0.12	D
MutationAssessor	Benign	1.2	.;L
PrimateAI	Uncertain	0.52	T
PROVEAN	Benign	-1.8	.;N
REVEL	Uncertain	0.35
Sift	Benign	0.14	.;T
Sift4G	Benign	0.10	T;T
Polyphen		0.0	.;B
Vest4		0.67
MutPred		0.47		.;Loss of stability (P = 0.015);
MVP		0.72
MPC		1.1
ClinPred		0.47	T
GERP RS		3.5
Varity_R		0.18
gMVP		0.71

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: chr16-69355072;