chr15-88836209-G-A

Variant names:

• chr15-88836209-G-A
• rs1057522582
• NM_001369268.1:c.3G>A

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PVS1_Strong PM2

The NM_001369268.1(ACAN):​c.3G>A​(p.Met1?) variant causes a start lost change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: ACAN NM_001369268.1 start_lost
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.17
• Publications: 0 publications found

Genes affected

ACAN (HGNC:319): (aggrecan) This gene is a member of the aggrecan/versican proteoglycan family. The encoded protein is an integral part of the extracellular matrix in cartilagenous tissue and it withstands compression in cartilage. Mutations in this gene may be involved in skeletal dysplasia and spinal degeneration. Multiple alternatively spliced transcript variants that encode different protein isoforms have been observed in this gene. [provided by RefSeq, Jul 2008]

ACAN Gene-Disease associations (from GenCC):

• ACAN-related short stature spectrum

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• osteochondritis dissecans

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Illumina, Orphanet
• short stature and advanced bone age, with or without early-onset osteoarthritis and/or osteochondritis dissecans

  Inheritance: AD Classification: DEFINITIVE Submitted by: Ambry Genetics
• spondyloepiphyseal dysplasia, Kimberley type

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: G2P, Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae)
• spondyloepimetaphyseal dysplasia, aggrecan type

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P, Orphanet
• short stature-advanced bone age-early-onset osteoarthritis syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PVS1: Start lost variant, next in-frame start position is after 5 pathogenic variants. Next in-frame start position is after 57 codons. Genomic position: 88838761. Lost 0.022 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001369268.1. 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
	ACAN	NM_001369268.1	MANE Select	c.3G>A	p.Met1?	start_lost	Exon 2 of 19	NP_001356197.1	P16112-4
	ACAN	NM_001411097.1		c.3G>A	p.Met1?	start_lost	Exon 2 of 18	NP_001398026.1	A0A5K1VW97
	ACAN	NM_013227.4		c.3G>A	p.Met1?	start_lost	Exon 2 of 18	NP_037359.3	P16112-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ACAN	ENST00000560601.4	TSL:3 MANE Select	c.3G>A	p.Met1?	start_lost	Exon 2 of 19	ENSP00000453581.2	P16112-4
	ACAN	ENST00000558207.5	TSL:1	c.3G>A	p.Met1?	start_lost	Exon 2 of 10	ENSP00000453003.1	Q6PID9
	ACAN	ENST00000439576.7	TSL:5	c.3G>A	p.Met1?	start_lost	Exon 2 of 18	ENSP00000387356.2	P16112-1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Uncertain	0.010
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.25	T
Eigen	Uncertain	0.50
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.90	D
M_CAP	Benign	0.059	D
MetaRNN	Pathogenic	0.97	D
MetaSVM	Benign	-1.1	T
PhyloP100		7.2
PROVEAN	Uncertain	-3.1	D
REVEL	Uncertain	0.42
Sift	Benign	0.057	T
Sift4G	Benign	0.40	T
Polyphen		0.34	B
Vest4		0.68
MutPred		0.91		Gain of catalytic residue at M1 (P = 0.0223)
MVP		0.41
ClinPred		0.96	D
GERP RS		5.3
Varity_R		0.38
gMVP		0.50

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1057522582; hg19: chr15-89379440;