6-32027362-A-G

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 1P and 5B. PP2BP4_StrongBP6

The NM_001002029.4(C4B):c.2719A>G(p.Thr907Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (no stars). Another nucleotide change resulting in same amino acid change has been previously reported as Likely benignin UniProt.

Frequency

Genomes: 𝑓 0.0 ( 0 hom., cov: 0)

Exomes 𝑓: 0.0000017 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

C4B
NM_001002029.4 missense

Scores

Clinical Significance

Benign/Likely benign no assertion criteria provided B:2

Conservation

PhyloP100: 1.08

Variant links:

Genes affected

C4B (HGNC:1324): (complement C4B (Chido/Rodgers blood group)) This gene encodes the basic form of complement factor 4, and together with the C4A gene, is part of the classical activation pathway. The protein is expressed as a single chain precursor which is proteolytically cleaved into a trimer of alpha, beta, and gamma chains prior to secretion. The trimer provides a surface for interaction between the antigen-antibody complex and other complement components. The alpha chain may be cleaved to release C4 anaphylatoxin, a mediator of local inflammation. Deficiency of this protein is associated with systemic lupus erythematosus. This gene localizes to the major histocompatibility complex (MHC) class III region on chromosome 6. Varying haplotypes of this gene cluster exist, such that individuals may have 1, 2, or 3 copies of this gene. In addition, this gene exists as a long form and a short form due to the presence or absence of a 6.4 kb endogenous HERV-K retrovirus in intron 9. [provided by RefSeq, May 2020]

C4B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

PP2

Missense variant where missense usually causes diseases, C4B

BP4

Computational evidence support a benign effect (MetaRNN=0.040878892).

BP6

Variant 6-32027362-A-G is Benign according to our data. Variant chr6-32027362-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 1284968.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr6-32027362-A-G is described in Lovd as [Benign]. Variant chr6-32027362-A-G is described in Lovd as [Likely_benign].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
C4B	NM_001002029.4 linkuse as main transcript	c.2719A>G	p.Thr907Ala	missense_variant	21/41	ENST00000435363.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
C4B	ENST00000435363.7 linkuse as main transcript	c.2719A>G	p.Thr907Ala	missense_variant	21/41	1	NM_001002029.4	P1

Frequencies

GnomAD3 genomes

AF:

0.00

AC:

AN:

39964

Hom.:

Cov.:

FAILED QC

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:

0.00

GnomAD3 exomes

AF:

0.0000580

AC:

AN:

68936

Hom.:

AF XY:

0.0000537

AC XY:

AN XY:

37218

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000493

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000248

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000444

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000171

AC:

AN:

583616

Hom.:

Cov.:

AF XY:

0.00000352

AC XY:

AN XY:

284100

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000151

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Data not reliable, filtered out with message: AC0;AS_VQSR

AF:

0.00

AC:

AN:

39964

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

18614

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:

0.00

Alfa

AF:

0.118

Hom.:

386

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:2

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

not specified

Benign:1

Benign, no assertion criteria provided

clinical testing

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

- -

not provided

Benign:1

Likely benign, no assertion criteria provided

clinical testing

Genome Diagnostics Laboratory, University Medical Center Utrecht

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.048

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.66

Cadd

Benign

3.3

Dann

Benign

0.18

DEOGEN2

Benign

0.0044

T;T

Eigen

Benign

-0.99

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.00027

M_CAP

Benign

0.030

MetaRNN

Benign

0.041

T;T

MetaSVM

Benign

-0.95

MutationAssessor

Benign

-2.5

N;.

MutationTaster

Benign

1.0

N;N

PROVEAN

Benign

1.7

N;N

REVEL

Benign

0.034

Sift

Benign

1.0

T;T

Sift4G

Benign

1.0

T;T

Polyphen

0.0

.;B

Vest4

0.18

MutPred

0.55

Loss of glycosylation at T907 (P = 0.0767);Loss of glycosylation at T907 (P = 0.0767);

MVP

0.061

ClinPred

0.015

GERP RS

3.0

Varity_R

0.037

gMVP

0.47

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