chr9-134809244-C-A

Position:

• chr9-134809244-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2 PP2 PP3_Moderate

The NM_000093.5(COL5A1):​c.3428C>A​(p.Pro1143Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,455,936 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: COL5A1 NM_000093.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.78

Genes affected

COL5A1 (HGNC:2209): (collagen type V alpha 1 chain) This gene encodes an alpha chain for one of the low abundance fibrillar collagens. Fibrillar collagen molecules are trimers that can be composed of one or more types of alpha chains. Type V collagen is found in tissues containing type I collagen and appears to regulate the assembly of heterotypic fibers composed of both type I and type V collagen. This gene product is closely related to type XI collagen and it is possible that the collagen chains of types V and XI constitute a single collagen type with tissue-specific chain combinations. The encoded procollagen protein occurs commonly as the heterotrimer pro-alpha1(V)-pro-alpha1(V)-pro-alpha2(V). Mutations in this gene are associated with Ehlers-Danlos syndrome, types I and II. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, May 2013]

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), COL5A1. . Gene score misZ 2.0682 (greater than the threshold 3.09). Trascript score misZ 4.1823 (greater than threshold 3.09). GenCC has associacion of gene with Ehlers-Danlos syndrome, classic type, 1, arterial disorder, Ehlers-Danlos syndrome, classic type.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.843

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COL5A1	NM_000093.5	c.3428C>A	p.Pro1143Gln	missense_variant	43/66	ENST00000371817.8	NP_000084.3
COL5A1	NM_001278074.1	c.3428C>A	p.Pro1143Gln	missense_variant	43/66		NP_001265003.1
COL5A1	XM_017014266.3	c.3428C>A	p.Pro1143Gln	missense_variant	43/65		XP_016869755.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL5A1	ENST00000371817.8	c.3428C>A	p.Pro1143Gln	missense_variant	43/66	1	NM_000093.5	ENSP00000360882	P4
COL5A1	ENST00000371820.4	c.3428C>A	p.Pro1143Gln	missense_variant	43/66	2		ENSP00000360885	A2
COL5A1	ENST00000463925.1	n.284C>A		non_coding_transcript_exon_variant	1/2	3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1455936 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 723684

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000253

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.01e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.70
BayesDel_addAF	Pathogenic	0.24	D
BayesDel_noAF	Uncertain	0.11
CADD	Uncertain	25
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.68	D;.
Eigen	Uncertain	0.55
Eigen_PC	Uncertain	0.50
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D;D
M_CAP	Pathogenic	0.45	D
MetaRNN	Pathogenic	0.84	D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Benign	0.98	L;L
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.81	D
PROVEAN	Pathogenic	-5.8	D;.
REVEL	Pathogenic	0.73
Sift	Benign	0.039	D;.
Sift4G	Uncertain	0.047	D;D
Polyphen		1.0	D;.
Vest4		0.71
MutPred		0.46		Loss of relative solvent accessibility (P = 0.1967);Loss of relative solvent accessibility (P = 0.1967);
MVP		0.82
MPC		0.50
ClinPred		0.98	D
GERP RS		3.6
Varity_R		0.27
gMVP		0.50

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: rs540131206; hg19: chr9-137701090;