chr7-7373367-C-T

Position:

• chr7-7373367-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001037763.3(COL28A1):​c.2539G>A​(p.Glu847Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/21 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)
• Consequence: COL28A1 NM_001037763.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.22

Genes affected

COL28A1 (HGNC:22442): (collagen type XXVIII alpha 1 chain) COL28A1 belongs to a class of collagens containing von Willebrand factor (VWF; MIM 613160) type A (VWFA) domains (Veit et al., 2006 [PubMed 16330543]).[supplied by OMIM, Nov 2010]

LOC107986764 (HGNC:):

ACMG classification

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=0.15906587).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COL28A1	NM_001037763.3	c.2539G>A	p.Glu847Lys	missense_variant	32/35	ENST00000399429.8	NP_001032852.2
LOC107986764	XR_002956539.2	n.442-3194C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COL28A1	ENST00000399429.8	c.2539G>A	p.Glu847Lys	missense_variant	32/35	1	NM_001037763.3	ENSP00000382356	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

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

May 22, 2023

The c.2539G>A (p.E847K) alteration is located in exon 32 (coding exon 31) of the COL28A1 gene. This alteration results from a G to A substitution at nucleotide position 2539, causing the glutamic acid (E) at amino acid position 847 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	0.14
BayesDel_addAF	Benign	-0.053	T
BayesDel_noAF	Benign	-0.31
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.028	T
Eigen	Benign	-0.39
Eigen_PC	Benign	-0.27
FATHMM_MKL	Benign	0.45	N
LIST_S2	Benign	0.80	T
M_CAP	Benign	0.025	D
MetaRNN	Benign	0.16	T
MetaSVM	Benign	-0.75	T
MutationAssessor	Benign	0.74	N
MutationTaster	Benign	1.0	D
PrimateAI	Benign	0.46	T
PROVEAN	Benign	-1.5	N
REVEL	Benign	0.23
Sift	Benign	0.78	T
Sift4G	Benign	0.69	T
Polyphen		0.17	B
Vest4		0.20
MutPred		0.58		Gain of MoRF binding (P = 0.0019);
MVP		0.57
MPC		0.033
ClinPred		0.68	D
GERP RS		4.4
Varity_R		0.35
gMVP		0.54

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: chr7-7412998;