Variant 20-63295131-C-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_020882.4(COL20A1):c.24C>A(p.His8Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000714 in 1,400,880 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 7.1e-7 ( 0 hom. )

Consequence

COL20A1
NM_020882.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.458

Variant links:

Genes affected

COL20A1 (HGNC:14670): (collagen type XX alpha 1 chain) Predicted to be located in endoplasmic reticulum lumen and extracellular region. Predicted to be part of collagen trimer. Predicted to be active in collagen-containing extracellular matrix and extracellular space. [provided by Alliance of Genome Resources, Apr 2022]

COL20A1 links:

COL20A1 (HGNC:):

COL20A1 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.10027403).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COL20A1	NM_020882.4 linkuse as main transcript	c.24C>A	p.His8Gln	missense_variant	2/36	ENST00000358894.11	NP_065933.2	Q9P218-1
COL20A1	XM_011528937.2 linkuse as main transcript	c.24C>A	p.His8Gln	missense_variant	2/36		XP_011527239.1
COL20A1	XM_011528938.2 linkuse as main transcript	c.24C>A	p.His8Gln	missense_variant	2/36		XP_011527240.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
COL20A1	ENST00000358894.11 linkuse as main transcript	c.24C>A	p.His8Gln	missense_variant	2/36	1	NM_020882.4	ENSP00000351767.6	Q9P218-1
COL20A1	ENST00000479501.5 linkuse as main transcript	n.86C>A		non_coding_transcript_exon_variant	2/36	1
COL20A1	ENST00000422202.5 linkuse as main transcript	c.24C>A	p.His8Gln	missense_variant	1/35	5		ENSP00000414753.1	Q9P218-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

7.14e-7

AC:

AN:

1400880

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

691254

show subpopulations

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:

9.25e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 18, 2023

The c.24C>A (p.H8Q) alteration is located in exon 2 (coding exon 1) of the COL20A1 gene. This alteration results from a C to A substitution at nucleotide position 24, causing the histidine (H) at amino acid position 8 to be replaced by a glutamine (Q). 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

Benign

0.11

BayesDel_addAF

Benign

-0.097

BayesDel_noAF

Benign

-0.38

CADD

Benign

5.3

DANN

Benign

0.81

DEOGEN2

Benign

0.0028

T;.

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.050

LIST_S2

Benign

0.33

T;T

M_CAP

Benign

0.025

MetaRNN

Benign

0.10

T;T

MetaSVM

Benign

-0.76

MutationAssessor

Benign

1.4

L;L

MutationTaster

Benign

1.0

N;N;N;N

PrimateAI

Benign

0.41

PROVEAN

Benign

-0.59

N;N

REVEL

Benign

0.071

Sift

Benign

0.26

T;T

Sift4G

Benign

0.22

T;T

Polyphen

0.28

B;.

Vest4

0.080

MutPred

0.37

Gain of relative solvent accessibility (P = 0.09);Gain of relative solvent accessibility (P = 0.09);

MVP

0.88

MPC

0.039

ClinPred

0.18

GERP RS

-1.1

Varity_R

0.042

gMVP

0.045

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over