Genetic Variant NM_152890.7:c.4438A>G (chr1-85745506-T-C) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_152890.7(COL24A1):c.4438A>G(p.Lys1480Glu) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.0000048 in 1,456,846 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000048 ( 0 hom. )

Consequence

COL24A1
NM_152890.7 missense, splice_region

Scores

Splicing: ADA: 0.0006140

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.93

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:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.33901173).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL24A1	NM_152890.7 link	c.4438A>G	p.Lys1480Glu	missense_variant, splice_region_variant	Exon 56 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.4438A>G	p.Lys1480Glu	missense_variant, splice_region_variant	Exon 56 of 60	1	NM_152890.7	ENSP00000359603.2	Q17RW2-1
COL24A1	ENST00000426639.5 link	n.*1825A>G		splice_region_variant, non_coding_transcript_exon_variant	Exon 55 of 59	5		ENSP00000409515.1	F8WDM8
COL24A1	ENST00000426639.5 link	n.*1825A>G		3_prime_UTR_variant	Exon 55 of 59	5		ENSP00000409515.1	F8WDM8

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000817

AC:

AN:

244664

Hom.:

AF XY:

0.0000150

AC XY:

AN XY:

132954

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000337

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000894

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000480

AC:

AN:

1456846

Hom.:

Cov.:

AF XY:

0.00000276

AC XY:

AN XY:

724822

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:

0.00000631

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000508

Hom.:

ExAC

AF:

0.00000828

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 25, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.4438A>G (p.K1480E) alteration is located in exon 56 (coding exon 56) of the COL24A1 gene. This alteration results from a A to G substitution at nucleotide position 4438, causing the lysine (K) at amino acid position 1480 to be replaced by a glutamic acid (E). 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

0.16

BayesDel_addAF

Uncertain

0.035

BayesDel_noAF

Benign

-0.090

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.0078

Eigen

Benign

0.034

Eigen_PC

Uncertain

0.23

FATHMM_MKL

Uncertain

0.97

LIST_S2

Benign

0.58

M_CAP

Benign

0.036

MetaRNN

Benign

0.34

MetaSVM

Uncertain

0.044

MutationAssessor

Benign

0.14

PrimateAI

Uncertain

0.60

PROVEAN

Benign

-0.99

REVEL

Uncertain

0.36

Sift

Benign

0.11

Sift4G

Benign

0.64

Polyphen

0.54

Vest4

0.52

MutPred

0.35

Loss of ubiquitination at K1480 (P = 0.003);

MVP

0.66

MPC

0.20

ClinPred

0.28

GERP RS

5.7

Varity_R

0.27

gMVP

0.49

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00061

dbscSNV1_RF

Benign

0.036

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

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