Genetic Variant VKORC1:c.283+837T>A (chr16-31092475-A-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is The variant received -2 classification points (ACMG Germline Pathogenicity v2019). PM2BP4_Strong

The NM_024006.6(VKORC1):c.283+837T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant is absent from the gnomAD population database at sites with sufficient sequencing coverage. In-silico predictor (BayesDel (noAF)) classifies this variant as likely benign. Splicing prediction tools (SpliceAI) predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 31)

Consequence

VKORC1
NM_024006.6 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -1.08

Publications

0 publications found

Variant links:

Genes affected

VKORC1 (HGNC:23663): (vitamin K epoxide reductase complex subunit 1) This gene encodes the catalytic subunit of the vitamin K epoxide reductase complex, which is responsible for the reduction of inactive vitamin K 2,3-epoxide to active vitamin K in the endoplasmic reticulum membrane. Vitamin K is a required co-factor for carboxylation of glutamic acid residues by vitamin K-dependent gamma-carboxylase in blood-clotting enzymes. Allelic variation in this gene is associated with vitamin k-dependent clotting factors combined deficiency of 2, and increased resistance or sensitivity to warfarin, an inhibitor of vitamin K epoxide reductase. Pseudogenes of this gene are located on chromosomes 1 and X. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2015]

VKORC1 Gene-Disease associations (from GenCC):

coumarin resistance
Inheritance: AD Classification: STRONG Submitted by: PanelApp Australia
vitamin K-dependent clotting factors, combined deficiency of, type 2
Inheritance: AR, Unknown Classification: STRONG, MODERATE, LIMITED Submitted by: ClinGen, PanelApp Australia, Labcorp Genetics (formerly Invitae)
vitamin K-dependent clotting factors, combined deficiency of, type 1
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

VKORC1 links:

ENSG00000255439 (HGNC:):

ENSG00000255439 links:

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new If you want to explore the variant's impact on the transcript NM_024006.6, check out the Mutation Effect Viewer. This is especially useful for frameshift variants or if you want to visualize the effect of exon loss / intron retention.

Classification according to ACMG Germline Pathogenicity v2019

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 points.

PM2

Absent from gnomAD (AD/XL gene) — PM2; Absent from gnomAD at well-covered site (MOI: AD+AR) (threshold 0.0001) — PM2 moderate.

BP4

Computational evidence supports benign — no pathogenic computational or splicing signal (BP4); Splicing verdict: benign (Strong).; Germline computational verdict: benign (Strong).

Variant Effect in Transcripts

Automated classification analysis was done for transcript: NM_024006.6. You can select a different transcript below to see updated classification assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
VKORC1	NM_024006.6	MANE Select	c.283+837T>A	intron	N/A	NP_076869.1	A0A0S2Z6I4
VKORC1	NM_001311311.2		c.367+308T>A	intron	N/A	NP_001298240.1
VKORC1	NM_206824.3		c.174-1133T>A	intron	N/A	NP_996560.1	Q9BQB6-3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
VKORC1	ENST00000394975.3	TSL:1 MANE Select	c.283+837T>A	intron	N/A	ENSP00000378426.2	Q9BQB6-1
ENSG00000255439	ENST00000529564.1	TSL:4	c.283+837T>A	intron	N/A	ENSP00000431371.1	E9PLN8
VKORC1	ENST00000319788.11	TSL:1	c.365+308T>A	intron	N/A	ENSP00000326135.7	Q9BQB6-2

Frequencies

GnomAD3 genomes

Cov.:

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.88

CADD

Benign

2.0

(source)

DANN

Benign

0.82

PhyloP100

-1.1

Splicing

Name

Calibrated prediction

Score

Prediction

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

Classification according to ACMG Germline Pathogenicity v2019

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over