8-99642202-C-T

Position:

• chr8-99642202-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_017890.5(VPS13B):​c.5687C>T​(p.Thr1896Ile) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic 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. T1896K) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: VPS13B NM_017890.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.11

Genes affected

VPS13B (HGNC:2183): (vacuolar protein sorting 13 homolog B) This gene encodes a potential transmembrane protein that may function in vesicle-mediated transport and sorting of proteins within the cell. This protein may play a role in the development and the function of the eye, hematological system, and central nervous system. Mutations in this gene have been associated with Cohen syndrome. Multiple splice variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.797

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
VPS13B	NM_017890.5	c.5687C>T	p.Thr1896Ile	missense_variant	34/62	ENST00000358544.7
VPS13B	NM_152564.5	c.5612C>T	p.Thr1871Ile	missense_variant	34/62	ENST00000357162.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
VPS13B	ENST00000358544.7	c.5687C>T	p.Thr1896Ile	missense_variant	34/62	1	NM_017890.5
VPS13B	ENST00000357162.7	c.5612C>T	p.Thr1871Ile	missense_variant	34/62	1	NM_152564.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.50
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.15
CADD	Uncertain	24
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.13	.;T
Eigen	Uncertain	0.65
Eigen_PC	Pathogenic	0.68
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.88	D;D
M_CAP	Uncertain	0.10	D
MetaRNN	Pathogenic	0.80	D;D
MetaSVM	Uncertain	-0.037	T
MutationAssessor	Benign	2.0	.;M
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	-2.0	N;N
REVEL	Uncertain	0.41
Sift	Pathogenic	0.0	D;D
Sift4G	Uncertain	0.011	D;D
Polyphen		1.0	D;D
Vest4		0.80
MutPred		0.26		.;Gain of sheet (P = 0.0266);
MVP		0.86
MPC		0.58
ClinPred		0.95	D
GERP RS		5.6
Varity_R		0.40
gMVP		0.73

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

LitVar

Other links and lift over

dbSNP: rs920484397; hg19: chr8-100654430;