rs113273712

Positions:

chr4-109752492-T-C

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS1

The NM_000204.5(CFI):c.916A>G(p.Ile306Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000305 in 1,613,198 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0015 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00018 ( 1 hom. )

Consequence

CFI
NM_000204.5 missense

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: -0.290

Variant links:

Genes affected

CFI (HGNC:5394): (complement factor I) This gene encodes a serine proteinase that is essential for regulating the complement cascade. The encoded preproprotein is cleaved to produce both heavy and light chains, which are linked by disulfide bonds to form a heterodimeric glycoprotein. This heterodimer can cleave and inactivate the complement components C4b and C3b, and it prevents the assembly of the C3 and C5 convertase enzymes. Defects in this gene cause complement factor I deficiency, an autosomal recessive disease associated with a susceptibility to pyogenic infections. Mutations in this gene have been associated with a predisposition to atypical hemolytic uremic syndrome, a disease characterized by acute renal failure, microangiopathic hemolytic anemia and thrombocytopenia. Primary glomerulonephritis with immune deposits and age-related macular degeneration are other conditions associated with mutations of this gene. [provided by RefSeq, Dec 2015]

CFI links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -16 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.010314584).

BP6

Variant 4-109752492-T-C is Benign according to our data. Variant chr4-109752492-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 347163.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr4-109752492-T-C is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00152 (232/152230) while in subpopulation AFR AF= 0.00527 (219/41532). AF 95% confidence interval is 0.0047. There are 0 homozygotes in gnomad4. There are 98 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CFI	NM_000204.5 linkuse as main transcript	c.916A>G	p.Ile306Val	missense_variant	8/13	ENST00000394634.7	NP_000195.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CFI	ENST00000394634.7 linkuse as main transcript	c.916A>G	p.Ile306Val	missense_variant	8/13	1	NM_000204.5	ENSP00000378130	P2

Frequencies

GnomAD3 genomes

AF:

0.00151

AC:

230

AN:

152112

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00524

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000328

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:

0.0000441

Gnomad OTH

AF:

0.00239

GnomAD3 exomes

AF:

0.000394

AC:

AN:

251238

Hom.:

AF XY:

0.000331

AC XY:

AN XY:

135810

show subpopulations

Gnomad AFR exome

AF:

0.00505

Gnomad AMR exome

AF:

0.000434

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:

0.00

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000178

AC:

260

AN:

1460968

Hom.:

Cov.:

AF XY:

0.000150

AC XY:

109

AN XY:

726806

show subpopulations

Gnomad4 AFR exome

AF:

0.00535

Gnomad4 AMR exome

AF:

0.000470

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000126

Gnomad4 OTH exome

AF:

0.000696

GnomAD4 genome

AF:

0.00152

AC:

232

AN:

152230

Hom.:

Cov.:

AF XY:

0.00132

AC XY:

AN XY:

74448

show subpopulations

Gnomad4 AFR

AF:

0.00527

Gnomad4 AMR

AF:

0.000327

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00237

Alfa

AF:

0.000311

Hom.:

Bravo

AF:

0.00164

ESP6500AA

AF:

0.00454

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000478

AC:

ClinVar

Significance: Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Institute for Genomic Medicine (IGM) Clinical Laboratory, Nationwide Children's Hospital	May 31, 2017	BP4, BP6; This alteration is predicted to be tolerated by multiple functional prediction tools, and was reported as a benign/likely benign alteration by a reputable source (ClinVar or other correspondence from a clinical testing laboratory). -
Likely benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Nov 16, 2023	Variant summary: CFI c.916A>G (p.Ile306Val) results in a conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00039 in 251238 control chromosomes, predominantly at a frequency of 0.0051 within the African or African-American subpopulation in the gnomAD database. The observed variant frequency within African or African-American control individuals in the gnomAD database is approximately 4.6 fold of the estimated maximal expected allele frequency for a pathogenic variant in CFI causing Complement Factor I Deficiency phenotype (0.0011), strongly suggesting that the variant is a benign polymorphism found primarily in populations of African or African-American origin. Although seen in literature as a high frequency alteration, to our knowledge, no penetrant association of c.916A>G in individuals affected with Complement Factor I Deficiency has been reported. Three submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. All submitters classified the variant as likely benign. Based on the evidence outlined above, the variant was classified as likely benign. -

Atypical hemolytic-uremic syndrome with I factor anomaly

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to determine this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 10, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.22

BayesDel_noAF

Benign

-0.090

CADD

Benign

2.9

DANN

Benign

0.70

DEOGEN2

Benign

0.077

.;T;T;T;.

Eigen

Benign

-0.95

Eigen_PC

Benign

-0.93

FATHMM_MKL

Benign

0.023

LIST_S2

Benign

0.56

T;T;T;T;T

M_CAP

Uncertain

0.097

MetaRNN

Benign

0.010

T;T;T;T;T

MetaSVM

Benign

-0.77

MutationAssessor

Uncertain

2.5

.;M;.;.;.

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.35

PROVEAN

Benign

0.070

.;N;N;.;N

REVEL

Uncertain

0.58

Sift

Benign

0.57

.;T;T;.;T

Sift4G

Benign

0.66

.;T;T;T;T

Polyphen

0.024, 0.0, 0.010

.;B;B;.;B

Vest4

0.069, 0.065, 0.050, 0.058

MVP

0.36

MPC

0.060

ClinPred

0.17

GERP RS

-2.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.062

gMVP

0.56

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