2-178331553-G-A

Variant names:

• chr2-178331553-G-A
• rs762943454
• NM_032523.4:c.320G>A

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 1P and 0B. PP3

The NM_032523.4(OSBPL6):​c.320G>A​(p.Arg107His) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000359 in 1,613,842 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 15/24 in silico tools predict a damaging outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000036 (0 hom.)
• Consequence: OSBPL6 NM_032523.4 missense, splice_region
• Scores: Splicing: ADA: 0.9858
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.90
• Publications: 0 publications found

Genes affected

OSBPL6 (HGNC:16388): (oxysterol binding protein like 6) This gene encodes a member of the oxysterol-binding protein (OSBP) family, a group of intracellular lipid receptors. Most members contain an N-terminal pleckstrin homology domain and a highly conserved C-terminal OSBP-like sterol-binding domain. Transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OSBPL6	NM_032523.4	c.320G>A	p.Arg107His	missense_variant, splice_region_variant	Exon 6 of 25	ENST00000190611.9	NP_115912.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OSBPL6	ENST00000190611.9	c.320G>A	p.Arg107His	missense_variant, splice_region_variant	Exon 6 of 25	1	NM_032523.4	ENSP00000190611.4

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 152116 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000197

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000477 AC: 12 AN: 251422 AF XY: 0.0000368

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000260

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000264

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000363 AC: 53 AN: 1461726 Hom.: 0 Cov.: 31 AF XY: 0.0000316 AC XY: 23 AN XY: 727160

African (AFR) AF: 0.0000299 AC: 1 AN: 33476

American (AMR) AF: 0.000268 AC: 12 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26128

East Asian (EAS) AF: 0.00 AC: 0 AN: 39680

South Asian (SAS) AF: 0.00 AC: 0 AN: 86252

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

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.0000333 AC: 37 AN: 1111904

Other (OTH) AF: 0.0000497 AC: 3 AN: 60386

GnomAD4 genome AF: 0.0000329 AC: 5 AN: 152116 Hom.: 0 Cov.: 32 AF XY: 0.0000538 AC XY: 4 AN XY: 74298

African (AFR) AF: 0.0000241 AC: 1 AN: 41416

American (AMR) AF: 0.000197 AC: 3 AN: 15264

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5198

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10610

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68012

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000378

ExAC AF: 0.0000247 AC: 3

EpiCase AF: 0.0000547

EpiControl AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Mar 11, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.320G>A (p.R107H) alteration is located in exon 6 (coding exon 4) of the OSBPL6 gene. This alteration results from a G to A substitution at nucleotide position 320, causing the arginine (R) at amino acid position 107 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Uncertain	0.094	D
BayesDel_noAF	Pathogenic	0.19
CADD	Pathogenic	34
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.39	.;.;.;.;T;.;.
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	1.0
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Pathogenic	1.0	D;D;D;D;D;.;D
M_CAP	Uncertain	0.12	D
MetaRNN	Pathogenic	0.96	D;D;D;D;D;D;D
MetaSVM	Uncertain	0.075	D
MutationAssessor	Pathogenic	3.9	H;H;H;H;H;H;.
PhyloP100		9.9
PrimateAI	Pathogenic	0.91	D
PROVEAN	Uncertain	-4.4	D;D;D;D;D;D;D
REVEL	Pathogenic	0.76
Sift	Pathogenic	0.0	D;D;D;D;D;D;D
Sift4G	Pathogenic	0.0010	D;D;D;D;D;D;D
Polyphen		1.0	D;D;.;D;D;D;D
Vest4		0.97
MutPred		0.91		Loss of MoRF binding (P = 0.034);Loss of MoRF binding (P = 0.034);Loss of MoRF binding (P = 0.034);Loss of MoRF binding (P = 0.034);Loss of MoRF binding (P = 0.034);Loss of MoRF binding (P = 0.034);.;
MVP		0.58
MPC		1.1
ClinPred		1.0	D
GERP RS		5.6
Varity_R		0.74
gMVP		0.86
Mutation Taster		=49/51	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	0.99
dbscSNV1_RF	Pathogenic	0.86
SpliceAI score (max)		0.13		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: rs762943454; hg19: chr2-179196280; COSMIC: COSV51915147;