Genetic Variant COL24A1:p.Thr1443Lys (chr1-85781230-G-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_152890.7(COL24A1):c.4328C>A(p.Thr1443Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000181 in 1,602,496 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

COL24A1
NM_152890.7 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.96

Variant links:

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]

COL24A1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL24A1	NM_152890.7 link	c.4328C>A	p.Thr1443Lys	missense_variant	Exon 52 of 60	ENST00000370571.7	NP_690850.2	Q17RW2-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
COL24A1	ENST00000370571.7 link	c.4328C>A	p.Thr1443Lys	missense_variant	Exon 52 of 60	1	NM_152890.7	ENSP00000359603.2	Q17RW2-1
COL24A1	ENST00000426639.5 link	n.*1778C>A		non_coding_transcript_exon_variant	Exon 53 of 59	5		ENSP00000409515.1	F8WDM8
COL24A1	ENST00000426639.5 link	n.*1778C>A		3_prime_UTR_variant	Exon 53 of 59	5		ENSP00000409515.1	F8WDM8

Frequencies

GnomAD3 genomes

AF:

0.0000264

AC:

AN:

151658

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.0000903

AC:

AN:

243754

Hom.:

AF XY:

0.0000680

AC XY:

AN XY:

132404

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000631

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000170

GnomAD4 exome

AF:

0.0000172

AC:

AN:

1450838

Hom.:

Cov.:

AF XY:

0.0000139

AC XY:

AN XY:

721744

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000550

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:

0.00

Gnomad4 OTH exome

AF:

0.0000167

GnomAD4 genome

AF:

0.0000264

AC:

AN:

151658

Hom.:

Cov.:

AF XY:

0.0000405

AC XY:

AN XY:

74040

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000197

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000479

Bravo

AF:

0.0000340

ExAC

AF:

0.0000331

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 29, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.4328C>A (p.T1443K) alteration is located in exon 52 (coding exon 52) of the COL24A1 gene. This alteration results from a C to A substitution at nucleotide position 4328, causing the threonine (T) at amino acid position 1443 to be replaced by a lysine (K). 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

0.13

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.15

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.20

Eigen

Benign

0.17

Eigen_PC

Uncertain

0.25

FATHMM_MKL

Uncertain

0.93

LIST_S2

Benign

0.77

M_CAP

Benign

0.076

MetaRNN

Uncertain

0.55

MetaSVM

Uncertain

0.042

MutationAssessor

Benign

0.21

PrimateAI

Uncertain

0.49

PROVEAN

Uncertain

-2.4

REVEL

Uncertain

0.48

Sift

Benign

0.056

Sift4G

Benign

0.081

Polyphen

0.97

Vest4

0.64

MutPred

0.36

Gain of methylation at T1443 (P = 0.003);

MVP

0.40

MPC

0.073

ClinPred

0.18

GERP RS

4.2

Varity_R

0.23

gMVP

0.47

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over