chr4-109741003-C-G

Position:

chr4-109741003-C-G

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_000204.5(CFI):c.1642G>C(p.Glu548Gln) variant causes a missense change. The variant allele was found at a frequency of 0.000546 in 1,614,102 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E548D) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0019 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00040 ( 1 hom. )

Consequence

CFI
NM_000204.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:7B:3

Conservation

PhyloP100: 6.88

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 -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.017847985).

BP6

Variant 4-109741003-C-G is Benign according to our data. Variant chr4-109741003-C-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 347147.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=4, Benign=1}.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00191 (291/152264) while in subpopulation AFR AF= 0.00597 (248/41558). AF 95% confidence interval is 0.00536. There are 0 homozygotes in gnomad4. There are 143 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	UniProt
CFI	NM_000204.5 linkuse as main transcript	c.1642G>C	p.Glu548Gln	missense_variant	13/13	ENST00000394634.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CFI	ENST00000394634.7 linkuse as main transcript	c.1642G>C	p.Glu548Gln	missense_variant	13/13	1	NM_000204.5	P2

Frequencies

GnomAD3 genomes

AF:

0.00192

AC:

292

AN:

152146

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00599

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.000279

Gnomad OTH

AF:

0.00144

GnomAD3 exomes

AF:

0.000712

AC:

179

AN:

251290

Hom.:

AF XY:

0.000582

AC XY:

AN XY:

135794

show subpopulations

Gnomad AFR exome

AF:

0.00505

Gnomad AMR exome

AF:

0.00165

Gnomad ASJ exome

AF:

0.0000992

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000273

Gnomad OTH exome

AF:

0.00130

GnomAD4 exome

AF:

0.000404

AC:

590

AN:

1461838

Hom.:

Cov.:

AF XY:

0.000378

AC XY:

275

AN XY:

727228

show subpopulations

Gnomad4 AFR exome

AF:

0.00597

Gnomad4 AMR exome

AF:

0.00157

Gnomad4 ASJ exome

AF:

0.0000765

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000182

Gnomad4 OTH exome

AF:

0.00118

GnomAD4 genome

AF:

0.00191

AC:

291

AN:

152264

Hom.:

Cov.:

AF XY:

0.00192

AC XY:

143

AN XY:

74460

show subpopulations

Gnomad4 AFR

AF:

0.00597

Gnomad4 AMR

AF:

0.00131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000279

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.000257

Hom.:

Bravo

AF:

0.00216

ESP6500AA

AF:

0.00499

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000717

AC:

Asia WGS

AF:

0.00144

AC:

AN:

3478

EpiCase

AF:

0.000436

EpiControl

AF:

0.000356

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:7Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:4Benign:1

Uncertain significance, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Uncertain significance, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Uncertain significance, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 23, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Jul 13, 2022	BS3_supporting -

not specified

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Jul 03, 2024	Variant summary: CFI c.1642G>C (p.Glu548Gln) results in a conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.00071 in 251290 control chromosomes, predominantly at a frequency of 0.005 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 50000 fold of the estimated maximal expected allele frequency for a pathogenic variant in CFI causing Genetic Atypical Hemolytic Uremic Syndrome phenotype (1e-07). c.1642G>C has been reported in the literature in individuals affected with Genetic Atypical Hemolytic Uremic Syndrome without evidence of causality (e.g. Gleeson_2016, Brocklebank_2023). These reports do not provide unequivocal conclusions about association of the variant with Genetic Atypical Hemolytic Uremic Syndrome. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 27268256, 37369098). ClinVar contains an entry for this variant (Variation ID: 347147). Based on the evidence outlined above, the variant was classified as likely benign. -
Uncertain significance, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Jan 04, 2021	DNA sequence analysis of the CFI gene demonstrated a sequence change, c.1642G>C, in exon 13 that results in an amino acid change, p.Glu548Gln. This sequence change has been described in the gnomAD database with a relatively high frequency of 0.52% in the African sub-population (dbSNP rs7437875). The p.Glu548Gln change has been reported in an individual with atypical hemolytic uremic syndrome (PMID: 27268256) and an individual with thrombotic thrombocytopenic pupura; however, this individual was also compound heterozygous for two variants in the ADAMTS13 gene (PMID: 30046676). Additionally, a different amino acid change at the same location (p.Glu548Gly) has been reported in association with atypical hemolytic uremic syndrome (PMID: 27268256). The p.Glu548Gln change affects a moderately conserved amino acid residue located in a domain of the CFI protein that is known to be functional. In-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL) provide contradictory results for the p.Glu548Gln substitution. Due to these contrasting evidences and the lack of functional studies, the clinical significance of the p.Glu548Gln change remains unknown at this time. -

Atypical hemolytic-uremic syndrome with I factor anomaly

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Dec 24, 2019	This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Atypical hemolytic-uremic syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

Jul 08, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.52

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.10

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.41

T;T;.

Eigen

Uncertain

0.59

Eigen_PC

Uncertain

0.64

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.80

T;T;T

M_CAP

Benign

0.074

MetaRNN

Benign

0.018

T;T;T

MetaSVM

Uncertain

0.39

MutationAssessor

Benign

1.4

L;.;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Benign

0.38

PROVEAN

Uncertain

-2.4

N;N;N

REVEL

Uncertain

0.63

Sift

Benign

0.052

T;T;T

Sift4G

Benign

0.063

T;T;T

Polyphen

1.0

D;D;P

Vest4

0.55

MVP

0.90

MPC

0.34

ClinPred

0.024

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.73

gMVP

0.75

Splicing

Name

Calibrated prediction

Score

Prediction

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