chr16-69321269-A-G

Variant names:

• chr16-69321269-A-G
• rs896152486
• NM_013245.3:c.1070A>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_013245.3(VPS4A):​c.1070A>G​(p.Lys357Arg) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. 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. K357M) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: VPS4A NM_013245.3 missense, splice_region
• Scores: Splicing: ADA: 0.7517
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.56
• Publications: 0 publications found

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]

COG8 Gene-Disease associations (from GenCC):

• COG8-congenital disorder of glycosylation

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, PanelApp Australia, Orphanet, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.20230588).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
VPS4A	NM_013245.3	c.1070A>G	p.Lys357Arg	missense_variant, splice_region_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.1070A>G	p.Lys357Arg	missense_variant, splice_region_variant	Exon 9 of 11	1	NM_013245.3	ENSP00000254950.11
ENSG00000260914	ENST00000570054.3	c.1142A>G	p.Lys381Arg	missense_variant, splice_region_variant	Exon 9 of 10	5		ENSP00000461295.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.059
BayesDel_addAF	Uncertain	0.014	T
BayesDel_noAF	Benign	-0.22
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Benign	0.090	.;T
Eigen	Benign	-0.11
Eigen_PC	Benign	0.11
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.89	D;D
M_CAP	Uncertain	0.086	D
MetaRNN	Benign	0.20	T;T
MetaSVM	Uncertain	0.071	D
MutationAssessor	Benign	0.39	.;N
PhyloP100		7.6
PrimateAI	Uncertain	0.66	T
PROVEAN	Benign	-0.27	.;N
REVEL	Uncertain	0.32
Sift	Benign	0.50	.;T
Sift4G	Benign	0.53	T;T
Polyphen		0.0	.;B
Vest4		0.27
MutPred		0.36		.;Loss of methylation at K357 (P = 0.0144);
MVP		0.55
MPC		0.71
ClinPred		0.68	D
GERP RS		5.4
Varity_R		0.12
gMVP		0.55

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.75
dbscSNV1_RF	Benign	0.58
SpliceAI score (max)		0.020		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: rs896152486; hg19: chr16-69355172;