12-14881796-C-T

Variant names:

• chr12-14881796-C-T
• rs35112962
• NM_000900.5:c.*343G>A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_000900.5(MGP):​c.*343G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00794 in 264,692 control chromosomes in the GnomAD database, including 46 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.013 (44 hom., cov: 32)
  • Exomes 𝑓: 0.0013 (2 hom.)
• Consequence: MGP NM_000900.5 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 0.504

Genes affected

MGP (HGNC:7060): (matrix Gla protein) This gene encodes a member of the osteocalcin/matrix Gla family of proteins. The encoded vitamin K-dependent protein is secreted by chondrocytes and vascular smooth muscle cells, and functions as a physiological inhibitor of ectopic tissue calcification. Carboxylation status of the encoded protein is associated with calcification of the vasculature in human patients with cardiovascular disease and calcification of the synovial membranes in osteoarthritis patients. Mutations in this gene cause Keutel syndrome in human patients, which is characterized by abnormal cartilage calcification, peripheral pulmonary stenosis and facial hypoplasia. [provided by RefSeq, Sep 2016]

C12orf60 (HGNC:28726): (chromosome 12 open reading frame 60)

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BP6: Variant 12-14881796-C-T is Benign according to our data. Variant chr12-14881796-C-T is described in ClinVar as [Benign]. Clinvar id is 307763.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0128 (1952/152076) while in subpopulation AFR AF= 0.0446 (1851/41478). AF 95% confidence interval is 0.0429. There are 44 homozygotes in gnomad4. There are 917 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 44 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MGP	NM_000900.5	c.*343G>A		3_prime_UTR_variant	Exon 4 of 4	ENST00000539261.6	NP_000891.2
MGP	NM_001190839.3	c.*343G>A		3_prime_UTR_variant	Exon 5 of 5		NP_001177768.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MGP	ENST00000539261.6	c.*343G>A		3_prime_UTR_variant	Exon 4 of 4	1	NM_000900.5	ENSP00000445907.1

Frequencies

GnomAD3 genomes AF: 0.0128 AC: 1951 AN: 151958 Hom.: 44 Cov.: 32

Gnomad AFR AF: 0.0447

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00446

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000208

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00633

Gnomad NFE AF: 0.000162

Gnomad OTH AF: 0.00910

GnomAD4 exome AF: 0.00133 AC: 150 AN: 112616 Hom.: 2 Cov.: 0 AF XY: 0.00121 AC XY: 73 AN XY: 60180

Gnomad4 AFR exome AF: 0.0355

Gnomad4 AMR exome AF: 0.00110

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000135

Gnomad4 OTH exome AF: 0.00208

GnomAD4 genome AF: 0.0128 AC: 1952 AN: 152076 Hom.: 44 Cov.: 32 AF XY: 0.0123 AC XY: 917 AN XY: 74314

Gnomad4 AFR AF: 0.0446

Gnomad4 AMR AF: 0.00445

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000208

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000162

Gnomad4 OTH AF: 0.00900

Alfa AF: 0.00184 Hom.: 5

Bravo AF: 0.0146

Asia WGS AF: 0.00115 AC: 4 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Keutel syndrome Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided Benign:1

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	3.1
DANN	Benign	0.45

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: rs35112962; hg19: chr12-15034730;