Genetic Variant NM_001856.4:c.4383G>T (chr1-31654018-C-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_001856.4(COL16A1):c.4383G>T(p.Arg1461Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000644 in 1,613,902 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000060 ( 0 hom. )

Consequence

COL16A1
NM_001856.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.21

Variant links:

Genes affected

COL16A1 (HGNC:2193): (collagen type XVI alpha 1 chain) This gene encodes the alpha chain of type XVI collagen, a member of the FACIT collagen family (fibril-associated collagens with interrupted helices). Members of this collagen family are found in association with fibril-forming collagens such as type I and II, and serve to maintain the integrity of the extracellular matrix. High levels of type XVI collagen have been found in fibroblasts and keratinocytes, and in smooth muscle and amnion. [provided by RefSeq, Jul 2008]

COL16A1 links:

PEF1-AS1 (HGNC:40154): (PEF1 and COL16A1 antisense RNA 1)

PEF1-AS1 links:

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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
COL16A1	NM_001856.4 link	c.4383G>T	p.Arg1461Ser	missense_variant	Exon 69 of 71	ENST00000373672.8	NP_001847.3	Q07092-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COL16A1	ENST00000373672.8 link	c.4383G>T	p.Arg1461Ser	missense_variant	Exon 69 of 71	5	NM_001856.4	ENSP00000362776.3		Q07092-1

Frequencies

GnomAD3 genomes

AF:

0.000105

AC:

AN:

152204

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000191

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000682

AC:

AN:

249144

Hom.:

AF XY:

0.0000740

AC XY:

AN XY:

135218

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000580

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000115

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.0000602

AC:

AN:

1461698

Hom.:

Cov.:

AF XY:

0.0000564

AC XY:

AN XY:

727180

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000134

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.0000639

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.000105

AC:

AN:

152204

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74338

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.000191

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000111

Hom.:

Bravo

AF:

0.0000642

ExAC

AF:

0.0000496

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000296

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 12, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.4383G>T (p.R1461S) alteration is located in exon 69 (coding exon 68) of the COL16A1 gene. This alteration results from a G to T substitution at nucleotide position 4383, causing the arginine (R) at amino acid position 1461 to be replaced by a serine (S). 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

Pathogenic

0.67

BayesDel_addAF

Uncertain

0.039

BayesDel_noAF

Uncertain

0.12

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.0084

Eigen

Uncertain

0.43

Eigen_PC

Uncertain

0.42

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.86

M_CAP

Uncertain

0.15

MetaRNN

Uncertain

0.73

MetaSVM

Uncertain

0.34

MutationAssessor

Benign

0.14

PrimateAI

Uncertain

0.66

PROVEAN

Benign

-0.41

REVEL

Uncertain

0.63

Sift

Benign

0.16

Sift4G

Uncertain

0.044

Polyphen

1.0

Vest4

0.73

MutPred

0.44

Loss of MoRF binding (P = 0.0191);

MVP

0.85

MPC

0.71

ClinPred

0.17

GERP RS

4.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.7

Varity_R

0.27

gMVP

0.55

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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