1-85737460-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_152890.7(COL24A1):c.4718T>C(p.Ile1573Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,852 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: COL24A1 NM_152890.7 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.05

Genes affected

COL24A1 (HGNC:20821): (collagen type XXIV alpha 1 chain) This gene is a member of the collagen gene family and is thought to regulate type I collagen fibrillogenesis during fetal development. [provided by RefSeq, Mar 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.871

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
COL24A1	NM_152890.7	c.4718T>C	p.Ile1573Thr	missense_variant	58/60	ENST00000370571.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COL24A1	ENST00000370571.7	c.4718T>C	p.Ile1573Thr	missense_variant	58/60	1	NM_152890.7	P1
COL24A1	ENST00000473734.1	c.131T>C	p.Ile44Thr	missense_variant, NMD_transcript_variant	2/4	4
COL24A1	ENST00000426639.5	c.*2105T>C		3_prime_UTR_variant, NMD_transcript_variant	57/59	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460852 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 726758

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: 9.00e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 06, 2021

The c.4718T>C (p.I1573T) alteration is located in exon 58 (coding exon 58) of the COL24A1 gene. This alteration results from a T to C substitution at nucleotide position 4718, causing the isoleucine (I) at amino acid position 1573 to be replaced by a threonine (T). 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	0.32
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	-0.040
Cadd	Pathogenic	27
Dann	Uncertain	1.0
DEOGEN2	Benign	0.14	T
Eigen	Pathogenic	0.83
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.95	D
M_CAP	Benign	0.064	D
MetaRNN	Pathogenic	0.87	D
MetaSVM	Uncertain	0.39	D
MutationAssessor	Pathogenic	3.5	H
MutationTaster	Benign	0.99	D;D
PrimateAI	Uncertain	0.57	T
PROVEAN	Uncertain	-3.9	D
REVEL	Pathogenic	0.66
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0020	D
Polyphen		1.0	D
Vest4		0.79
MutPred		0.71		Loss of stability (P = 0.0047);
MVP		0.57
MPC		0.25
ClinPred		0.99	D
GERP RS		4.7
Varity_R		0.52
gMVP		0.70

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.

Other links and lift over

hg19: chr1-86203143;