rs1554797269

Variant names:

• chr9-134772815-C-G
• rs1554797269
• NM_000093.5:c.2312C>G

Your query was ambiguous. Multiple possible variants found:

• chr9-134772815-C-G
• chr9-134772815-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1 PM2

The NM_000093.5(COL5A1):​c.2312C>G​(p.Pro771Arg) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,678 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: COL5A1 NM_000093.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.35

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]

ENSG00000286502 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a modified_residue Hydroxyproline (size 0) in uniprot entity CO5A1_HUMAN
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL5A1	NM_000093.5	c.2312C>G	p.Pro771Arg	missense_variant	Exon 26 of 66	ENST00000371817.8	NP_000084.3
COL5A1	NM_001278074.1	c.2312C>G	p.Pro771Arg	missense_variant	Exon 26 of 66		NP_001265003.1
COL5A1	XM_017014266.3	c.2312C>G	p.Pro771Arg	missense_variant	Exon 26 of 65		XP_016869755.1
LOC124902301	XR_007061843.1	n.2665-141G>C		intron_variant	Intron 1 of 1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL5A1	ENST00000371817.8	c.2312C>G	p.Pro771Arg	missense_variant	Exon 26 of 66	1	NM_000093.5	ENSP00000360882.3
COL5A1	ENST00000371820.4	c.2312C>G	p.Pro771Arg	missense_variant	Exon 26 of 66	2		ENSP00000360885.4
ENSG00000286502	ENST00000666389.1	n.2456-141G>C		intron_variant	Intron 1 of 1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461678 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727118

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Ehlers-Danlos syndrome, classic type, 1 Uncertain:1

Jul 21, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces proline, which is neutral and non-polar, with arginine, which is basic and polar, at codon 771 of the COL5A1 protein (p.Pro771Arg). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with COL5A1-related conditions. ClinVar contains an entry for this variant (Variation ID: 529263). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt COL5A1 protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.28
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.0
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.79	D;.
Eigen	Benign	-0.0078
Eigen_PC	Benign	0.072
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.90	D;D
M_CAP	Uncertain	0.12	D
MetaRNN	Uncertain	0.51	D;D
MetaSVM	Uncertain	0.57	D
MutationAssessor	Benign	1.9	L;L
PrimateAI	Uncertain	0.67	T
PROVEAN	Uncertain	-3.6	D;.
REVEL	Uncertain	0.43
Sift	Uncertain	0.029	D;.
Sift4G	Uncertain	0.027	D;D
Polyphen		0.19	B;.
Vest4		0.54
MutPred		0.50		Loss of catalytic residue at P770 (P = 0.0144);Loss of catalytic residue at P770 (P = 0.0144);
MVP		0.71
MPC		0.67
ClinPred		0.96	D
GERP RS		3.7
Varity_R		0.23
gMVP		0.19

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: rs1554797269; hg19: chr9-137664661;