rs886037824

Variant names:

• chrX-153507184-A-C
• rs886037824
• NM_001711.6:c.908A>C

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001711.6(BGN):​c.908A>C​(p.Gln303Pro) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic 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: not found (cov: 24)
• Consequence: BGN NM_001711.6 missense, splice_region
• Scores: Splicing: ADA: 0.9868
• Clinical Significance: Uncertain significance criteria provided, single submitter P:2 U:1
• Conservation: PhyloP100: 1.77
• Publications: 3 publications found

Genes affected

BGN (HGNC:1044): (biglycan) This gene encodes a member of the small leucine-rich proteoglycan (SLRP) family of proteins. The encoded preproprotein is proteolytically processed to generate the mature protein, which plays a role in bone growth, muscle development and regeneration, and collagen fibril assembly in multiple tissues. This protein may also regulate inflammation and innate immunity. Additionally, the encoded protein may contribute to atherosclerosis and aortic valve stenosis in human patients. This gene and the related gene decorin are thought to be the result of a gene duplication. [provided by RefSeq, Nov 2015]

BGN Gene-Disease associations (from GenCC):

• Meester-Loeys syndrome

  Inheritance: XL Classification: STRONG, MODERATE, LIMITED Submitted by: Ambry Genetics, Illumina, Genomics England PanelApp, G2P
• X-linked spondyloepimetaphyseal dysplasia

  Inheritance: XL Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet, G2P
• familial thoracic aortic aneurysm and aortic dissection

  Inheritance: Unknown Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001711.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BGN	NM_001711.6	MANE Select	c.908A>C	p.Gln303Pro	missense splice_region	Exon 7 of 8	NP_001702.1	P21810

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BGN	ENST00000331595.9	TSL:1 MANE Select	c.908A>C	p.Gln303Pro	missense splice_region	Exon 7 of 8	ENSP00000327336.4	P21810
	BGN	ENST00000859737.1		c.959A>C	p.Gln320Pro	missense splice_region	Exon 7 of 8	ENSP00000529796.1
	BGN	ENST00000859739.1		c.959A>C	p.Gln320Pro	missense splice_region	Exon 7 of 8	ENSP00000529798.1

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 24

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	1	-	Meester-Loeys syndrome (2)
1	-	-	Familial thoracic aortic aneurysm and aortic dissection (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.38	D
BayesDel_noAF	Pathogenic	0.30
CADD	Pathogenic	29
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.63	D
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Uncertain	0.87	D
M_CAP	Uncertain	0.19	D
MetaRNN	Pathogenic	0.82	D
MetaSVM	Uncertain	-0.060	T
MutationAssessor	Pathogenic	3.3	M
PhyloP100		1.8
PrimateAI	Uncertain	0.69	T
PROVEAN	Uncertain	-4.3	D
REVEL	Uncertain	0.61
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0030	D
Polyphen		1.0	D
Vest4		0.59
MutPred		0.53		Gain of ubiquitination at K300 (P = 0.0822)
MVP		0.98
MPC		1.1
ClinPred		0.99	D
GERP RS		4.8
Varity_R		0.84
gMVP		0.88
Mutation Taster		=60/40	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	0.99
dbscSNV1_RF	Pathogenic	0.88
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: rs886037824; hg19: chrX-152772642;