rs751950836

Positions:

• chr9-134796386-G-A
• chr9-134796386-G-C

Variant summary

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

The NM_000093.5(COL5A1):​c.2812G>A​(p.Gly938Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,842 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: COL5A1 NM_000093.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.98

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=0.19482878).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COL5A1	NM_000093.5	c.2812G>A	p.Gly938Ser	missense_variant	35/66	ENST00000371817.8	NP_000084.3
COL5A1	NM_001278074.1	c.2812G>A	p.Gly938Ser	missense_variant	35/66		NP_001265003.1
COL5A1	XM_017014266.3	c.2812G>A	p.Gly938Ser	missense_variant	35/65		XP_016869755.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL5A1	ENST00000371817.8	c.2812G>A	p.Gly938Ser	missense_variant	35/66	1	NM_000093.5	ENSP00000360882	P4
COL5A1	ENST00000371820.4	c.2812G>A	p.Gly938Ser	missense_variant	35/66	2		ENSP00000360885	A2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461842 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727218

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.056
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	21
DANN	Benign	0.93
DEOGEN2	Benign	0.077	T;.
Eigen	Benign	-0.51
Eigen_PC	Benign	-0.31
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Uncertain	0.90	D;D
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.19	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.43	N;N
MutationTaster	Benign	0.94	D
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-0.67	N;.
REVEL	Benign	0.12
Sift	Benign	0.38	T;.
Sift4G	Benign	0.85	T;T
Polyphen		0.11	B;.
Vest4		0.32
MutPred		0.27		Gain of phosphorylation at G938 (P = 0.0033);Gain of phosphorylation at G938 (P = 0.0033);
MVP		0.44
MPC		0.53
ClinPred		0.85	D
GERP RS		4.5
Varity_R		0.069
gMVP		0.31

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: rs751950836; hg19: chr9-137688232;