9-98985799-A-G

Variant names:

• chr9-98985799-A-G
• rs1838301280
• NM_001855.5:c.335A>G

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_001855.5(COL15A1):​c.335A>G​(p.Asp112Gly) variant causes a missense change involving the alteration of a conserved nucleotide. 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: COL15A1 NM_001855.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.25

Genes affected

COL15A1 (HGNC:2192): (collagen type XV alpha 1 chain) This gene encodes the alpha chain of type XV collagen, a member of the FACIT collagen family (fibril-associated collagens with interrupted helices). Type XV collagen has a wide tissue distribution but the strongest expression is localized to basement membrane zones so it may function to adhere basement membranes to underlying connective tissue stroma. The proteolytically produced C-terminal fragment of type XV collagen is restin, a potentially antiangiogenic protein that is closely related to endostatin. Mouse studies have shown that collagen XV deficiency is associated with muscle and microvessel deterioration. [provided by RefSeq, May 2013]

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.944

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL15A1	NM_001855.5	c.335A>G	p.Asp112Gly	missense_variant	Exon 3 of 42	ENST00000375001.8	NP_001846.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL15A1	ENST00000375001.8	c.335A>G	p.Asp112Gly	missense_variant	Exon 3 of 42	1	NM_001855.5	ENSP00000364140.3
COL15A1	ENST00000471477.1	n.758A>G		non_coding_transcript_exon_variant	Exon 3 of 3	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Apr 11, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.335A>G (p.D112G) alteration is located in exon 3 (coding exon 3) of the COL15A1 gene. This alteration results from a A to G substitution at nucleotide position 335, causing the aspartic acid (D) at amino acid position 112 to be replaced by a glycine (G). 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	0.79
BayesDel_addAF	Pathogenic	0.21	D
BayesDel_noAF	Uncertain	0.070
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.62	D;T
Eigen	Pathogenic	0.77
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.94	D;D
M_CAP	Benign	0.018	T
MetaRNN	Pathogenic	0.94	D;D
MetaSVM	Benign	-1.2	T
MutationAssessor	Pathogenic	3.3	M;.
PhyloP100		9.2
PrimateAI	Uncertain	0.58	T
PROVEAN	Pathogenic	-4.9	D;.
REVEL	Uncertain	0.58
Sift	Uncertain	0.0060	D;.
Sift4G	Uncertain	0.0080	D;D
Polyphen		1.0	D;.
Vest4		0.92
MutPred		0.77		Loss of ubiquitination at K116 (P = 0.0777);.;
MVP		0.61
MPC		0.48
ClinPred		0.99	D
GERP RS		5.3
Varity_R		0.67
gMVP		0.58
Mutation Taster		=78/22	polymorphism

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

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Other links and lift over

dbSNP: rs1838301280; hg19: chr9-101748081;