9-120952821-C-T

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BP4_Strong

The NM_001735.3(C5):c.4949G>A(p.Arg1650Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000328 in 1,613,466 control chromosomes in the GnomAD database, with no homozygous occurrence. 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: 𝑓 0.00018 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000018 ( 0 hom. )

Consequence

C5
NM_001735.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.75

Variant links:

Genes affected

C5 (HGNC:1331): (complement C5) This gene encodes a component of the complement system, a part of the innate immune system that plays an important role in inflammation, host homeostasis, and host defense against pathogens. The encoded preproprotein is proteolytically processed to generate multiple protein products, including the C5 alpha chain, C5 beta chain, C5a anaphylatoxin and C5b. The C5 protein is comprised of the C5 alpha and beta chains, which are linked by a disulfide bridge. Cleavage of the alpha chain by a convertase enzyme results in the formation of the C5a anaphylatoxin, which possesses potent spasmogenic and chemotactic activity, and the C5b macromolecular cleavage product, a subunit of the membrane attack complex (MAC). Mutations in this gene cause complement component 5 deficiency, a disease characterized by recurrent bacterial infections. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2015]

C5 links:

C5-OT1 (HGNC:):

C5-OT1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.033655584).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
C5	NM_001735.3 linkuse as main transcript	c.4949G>A	p.Arg1650Lys	missense_variant	41/41	ENST00000223642.3
C5-OT1	NR_148450.1 linkuse as main transcript	n.11G>A		non_coding_transcript_exon_variant	1/2
C5	NM_001317163.2 linkuse as main transcript	c.4967G>A	p.Arg1656Lys	missense_variant	41/41

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
C5	ENST00000223642.3 linkuse as main transcript	c.4949G>A	p.Arg1650Lys	missense_variant	41/41	1	NM_001735.3	P1

Frequencies

GnomAD3 genomes

AF:

0.000177

AC:

AN:

152208

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000651

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:

0.00

GnomAD3 exomes

AF:

0.0000318

AC:

AN:

251366

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135844

show subpopulations

Gnomad AFR exome

AF:

0.000369

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000178

AC:

AN:

1461258

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

726974

show subpopulations

Gnomad4 AFR exome

AF:

0.000628

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.00e-7

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.000177

AC:

AN:

152208

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74364

show subpopulations

Gnomad4 AFR

AF:

0.000651

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:

0.00

Alfa

AF:

0.000230

Hom.:

Bravo

AF:

0.000181

ESP6500AA

AF:

0.000681

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000494

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 11, 2022

The c.4949G>A (p.R1650K) alteration is located in exon 41 (coding exon 41) of the C5 gene. This alteration results from a G to A substitution at nucleotide position 4949, causing the arginine (R) at amino acid position 1650 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Oct 13, 2023

This sequence change replaces arginine, which is basic and polar, with lysine, which is basic and polar, at codon 1650 of the C5 protein (p.Arg1650Lys). This variant is present in population databases (rs145613662, gnomAD 0.05%). This variant has not been reported in the literature in individuals affected with C5-related conditions. ClinVar contains an entry for this variant (Variation ID: 1432048). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt C5 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.062

BayesDel_addAF

Benign

-0.56

BayesDel_noAF

Benign

-0.68

Cadd

Benign

Dann

Benign

0.76

DEOGEN2

Benign

0.047

Eigen

Benign

-0.90

Eigen_PC

Benign

-0.76

FATHMM_MKL

Benign

0.18

LIST_S2

Benign

0.62

M_CAP

Benign

0.0035

MetaRNN

Benign

0.034

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.34

MutationTaster

Benign

1.0

PrimateAI

Benign

0.28

PROVEAN

Benign

0.060

REVEL

Benign

0.037

Sift

Benign

0.22

Sift4G

Benign

0.11

Polyphen

0.0060

Vest4

0.092

MVP

0.29

MPC

0.15

ClinPred

0.0086

GERP RS

1.6

Varity_R

0.20

gMVP

0.48

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