Variant chr1-27369339-C-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_003665.4(FCN3):c.797G>C(p.Arg266Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,226 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R266H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Consequence

FCN3
NM_003665.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -4.32

Variant links:

Genes affected

FCN3 (HGNC:3625): (ficolin 3) Ficolins are a group of proteins which consist of a collagen-like domain and a fibrinogen-like domain. In human serum, there are two types of ficolins, both of which have lectin activity. The protein encoded by this gene is a thermolabile beta-2-macroglycoprotein found in all human serum and is a member of the ficolin/opsonin p35 lectin family. The protein, which was initially identified based on its reactivity with sera from patients with systemic lupus erythematosus, has been shown to have a calcium-independent lectin activity. The protein can activate the complement pathway in association with MASPs and sMAP, thereby aiding in host defense through the activation of the lectin pathway. Alternative splicing occurs at this locus and two variants, each encoding a distinct isoform, have been identified. [provided by RefSeq, Jul 2008]

FCN3 links:

FCN3 (HGNC:):

FCN3 links:

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ACMG classification

Classification made for transcript

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=0.22156149).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FCN3	NM_003665.4 linkuse as main transcript	c.797G>C	p.Arg266Pro	missense_variant	8/8	ENST00000270879.9	NP_003656.2	O75636-1Q6UY50
FCN3	NM_173452.3 linkuse as main transcript	c.764G>C	p.Arg255Pro	missense_variant	7/7		NP_775628.1	O75636-2Q6UXM4Q6UY50

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
FCN3	ENST00000270879.9 linkuse as main transcript	c.797G>C	p.Arg266Pro	missense_variant	8/8	1	NM_003665.4	ENSP00000270879.4	O75636-1
FCN3	ENST00000354982.2 linkuse as main transcript	c.764G>C	p.Arg255Pro	missense_variant	7/7	1		ENSP00000347077.2	O75636-2
FCN3	ENST00000699962.1 linkuse as main transcript	n.796G>C		non_coding_transcript_exon_variant	7/7

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152226

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.000478

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152226

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74374

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

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:

0.000478

Bravo

AF:

0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 29, 2023

The c.797G>C (p.R266P) alteration is located in exon 8 (coding exon 8) of the FCN3 gene. This alteration results from a G to C substitution at nucleotide position 797, causing the arginine (R) at amino acid position 266 to be replaced by a proline (P). 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

0.27

BayesDel_addAF

Benign

-0.092

BayesDel_noAF

Benign

-0.37

CADD

Benign

1.0

DANN

Benign

0.89

DEOGEN2

Benign

0.040

T;.

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.3

FATHMM_MKL

Benign

0.062

LIST_S2

Benign

0.52

T;T

M_CAP

Benign

0.024

MetaRNN

Benign

0.22

T;T

MetaSVM

Benign

-0.97

MutationAssessor

Benign

0.33

N;.

PrimateAI

Benign

0.21

PROVEAN

Benign

-1.8

N;N

REVEL

Benign

0.27

Sift

Benign

0.21

T;T

Sift4G

Benign

0.30

T;T

Polyphen

0.0010

B;.

Vest4

0.12

MutPred

0.66

Loss of MoRF binding (P = 0.011);.;

MVP

0.66

MPC

0.19

ClinPred

0.056

GERP RS

-3.6

Varity_R

0.86

gMVP

0.65

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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