Genetic Variant APOBEC3G:c.*418C>T (chr22-39087839-C-T) – ACMG Classification: Benign (-12 pts)

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_StrongBA1

The NM_021822.4(APOBEC3G):c.*418C>T variant causes a downstream gene change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0553 in 227,608 control chromosomes in the GnomAD database, including 1,679 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.080 ( 1628 hom., cov: 32)

Exomes 𝑓: 0.0064 ( 51 hom. )

Consequence

APOBEC3G
NM_021822.4 downstream_gene

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -2.27

Publications

11 publications found

Variant links:

Genes affected

APOBEC3G (HGNC:17357): (apolipoprotein B mRNA editing enzyme catalytic subunit 3G) This gene is a member of the cytidine deaminase gene family. It is one of seven related genes or pseudogenes found in a cluster, thought to result from gene duplication, on chromosome 22. Members of the cluster encode proteins that are structurally and functionally related to the C to U RNA-editing cytidine deaminase APOBEC1. The protein encoded by this gene catalyzes site-specific deamination of both RNA and single-stranded DNA. The encoded protein has been found to be a specific inhibitor of human immunodeficiency virus-1 (HIV-1) infectivity. [provided by RefSeq, Mar 2017]

APOBEC3G links:

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ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -12 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.88).

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.273 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	MANE	Protein	UniProt
APOBEC3G	NM_021822.4 link	c.*418C>T	downstream_gene_variant	ENST00000407997.4	NP_068594.1	Q9HC16-1
APOBEC3G	NM_001349436.1 link	c.*418C>T	downstream_gene_variant		NP_001336365.1
APOBEC3G	NM_001349437.2 link	c.*418C>T	downstream_gene_variant		NP_001336366.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
APOBEC3G	ENST00000407997.4 link	c.*418C>T		downstream_gene_variant		1	NM_021822.4	ENSP00000385057.3		Q9HC16-1

Frequencies

GnomAD3 genomes

AF:

0.0795

AC:

12079

AN:

151948

Hom.:

1627

Cov.:

show subpopulations

Gnomad AFR

AF:

0.278

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0284

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00124

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.0158

Gnomad NFE

AF:

0.000706

Gnomad OTH

AF:

0.0566

GnomAD4 exome

AF:

0.00635

AC:

480

AN:

75542

Hom.:

AF XY:

0.00526

AC XY:

219

AN XY:

41674

show subpopulations

African (AFR)

AF:

0.261

AC:

357

AN:

1368

American (AMR)

AF:

0.0155

AC:

AN:

3812

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

1600

East Asian (EAS)

AF:

0.00

AC:

AN:

3106

South Asian (SAS)

AF:

0.000534

AC:

AN:

13098

European-Finnish (FIN)

AF:

0.00

AC:

AN:

2792

Middle Eastern (MID)

AF:

0.0100

AC:

AN:

200

European-Non Finnish (NFE)

AF:

0.000629

AC:

AN:

46088

Other (OTH)

AF:

0.00748

AC:

AN:

3478

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.506

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0796

AC:

12097

AN:

152066

Hom.:

1628

Cov.:

AF XY:

0.0770

AC XY:

5728

AN XY:

74356

show subpopulations

African (AFR)

AF:

0.278

AC:

11488

AN:

41384

American (AMR)

AF:

0.0283

AC:

432

AN:

15278

Ashkenazi Jewish (ASJ)

AF:

0.000288

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.00104

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10604

Middle Eastern (MID)

AF:

0.0170

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000706

AC:

AN:

68002

Other (OTH)

AF:

0.0560

AC:

118

AN:

2106

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.506

Heterozygous variant carriers

439

878

1318

1757

2196

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

114

228

342

456

570

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0151

Hom.:

Bravo

AF:

0.0896

Asia WGS

AF:

0.0170

AC:

AN:

3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.88

CADD

Benign

0.21

(source)

DANN

Benign

0.68

PhyloP100

-2.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over