9-134730255-C-A

Position:

• chr9-134730255-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The ENST00000371817.8(COL5A1):​c.944C>A​(p.Thr315Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T315M) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 34)
• Consequence: COL5A1 ENST00000371817.8 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.35

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 1 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.
• BP4: Computational evidence support a benign effect (MetaRNN=0.15446013).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COL5A1	NM_000093.5	c.944C>A	p.Thr315Lys	missense_variant	7/66	ENST00000371817.8	NP_000084.3
COL5A1	NM_001278074.1	c.944C>A	p.Thr315Lys	missense_variant	7/66		NP_001265003.1
COL5A1	XM_017014266.3	c.944C>A	p.Thr315Lys	missense_variant	7/65		XP_016869755.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL5A1	ENST00000371817.8	c.944C>A	p.Thr315Lys	missense_variant	7/66	1	NM_000093.5	ENSP00000360882	P4
COL5A1	ENST00000371820.4	c.944C>A	p.Thr315Lys	missense_variant	7/66	2		ENSP00000360885	A2

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 34

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.089
BayesDel_addAF	Benign	-0.022	T
BayesDel_noAF	Benign	-0.27
CADD	Benign	16
DANN	Benign	0.79
DEOGEN2	Benign	0.12	T;.
Eigen	Benign	-0.65
Eigen_PC	Benign	-0.72
FATHMM_MKL	Benign	0.72	D
LIST_S2	Benign	0.51	T;T
M_CAP	Uncertain	0.17	D
MetaRNN	Benign	0.15	T;T
MetaSVM	Benign	-0.59	T
MutationAssessor	Benign	1.6	L;L
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.45	T
PROVEAN	Benign	-1.6	N;.
REVEL	Benign	0.23
Sift	Benign	0.90	T;.
Sift4G	Benign	0.40	T;T
Polyphen		0.80	P;.
Vest4		0.28
MutPred		0.31		Gain of ubiquitination at T315 (P = 0.0025);Gain of ubiquitination at T315 (P = 0.0025);
MVP		0.65
MPC		0.59
ClinPred		0.33	T
GERP RS		3.5
Varity_R		0.030
gMVP		0.43

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

Publications

LitVar

Other links and lift over

dbSNP: rs145093766; hg19: chr9-137622101;