Genetic Variant APOBEC3G:p.Leu371Leu (chr22-39087097-C-T) – ACMG Classification: Benign (-13 pts)

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP7BS1BS2

The NM_021822.4(APOBEC3G):c.1111C>T(p.Leu371Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00167 in 1,613,962 control chromosomes in the GnomAD database, including 31 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 0.0081 ( 14 hom., cov: 32)

Exomes 𝑓: 0.0010 ( 17 hom. )

Consequence

APOBEC3G
NM_021822.4 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.267

Publications

4 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 -13 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.98).

BP7

Synonymous conserved (PhyloP=-0.267 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00811 (1235/152294) while in subpopulation AFR AF = 0.0278 (1155/41564). AF 95% confidence interval is 0.0265. There are 14 homozygotes in GnomAd4. There are 575 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 14 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
APOBEC3G	NM_021822.4 link	c.1111C>T	p.Leu371Leu	synonymous_variant	Exon 7 of 8	ENST00000407997.4	NP_068594.1	Q9HC16-1
APOBEC3G	NM_001349436.1 link	c.1078C>T	p.Leu360Leu	synonymous_variant	Exon 7 of 8		NP_001336365.1
APOBEC3G	NM_001349437.2 link	c.910C>T	p.Leu304Leu	synonymous_variant	Exon 6 of 7		NP_001336366.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
APOBEC3G	ENST00000407997.4 link	c.1111C>T	p.Leu371Leu	synonymous_variant	Exon 7 of 8	1	NM_021822.4	ENSP00000385057.3		Q9HC16-1

Frequencies

GnomAD3 genomes

AF:

0.00808

AC:

1229

AN:

152176

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0277

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00295

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:

0.000323

Gnomad OTH

AF:

0.00622

GnomAD2 exomes

AF:

0.00214

AC:

537

AN:

251388

AF XY:

0.00157

show subpopulations

Gnomad AFR exome

AF:

0.0287

Gnomad AMR exome

AF:

0.00121

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000141

Gnomad OTH exome

AF:

0.00147

GnomAD4 exome

AF:

0.00100

AC:

1466

AN:

1461668

Hom.:

Cov.:

AF XY:

0.000876

AC XY:

637

AN XY:

727104

show subpopulations

African (AFR)

AF:

0.0309

AC:

1035

AN:

33476

American (AMR)

AF:

0.00172

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000580

AC:

AN:

86228

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00178

AC:

AN:

5616

European-Non Finnish (NFE)

AF:

0.000200

AC:

222

AN:

1111998

Other (OTH)

AF:

0.00194

AC:

117

AN:

60370

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.463

Heterozygous variant carriers

191

286

382

477

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

114

152

190

<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:

0.00811

AC:

1235

AN:

152294

Hom.:

Cov.:

AF XY:

0.00772

AC XY:

575

AN XY:

74472

show subpopulations

African (AFR)

AF:

0.0278

AC:

1155

AN:

41564

American (AMR)

AF:

0.00294

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.000323

AC:

AN:

68014

Other (OTH)

AF:

0.00616

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.494

Heterozygous variant carriers

122

182

243

304

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome 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

Alfa

AF:

0.00303

Hom.:

Bravo

AF:

0.00922

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.000474

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.98

CADD

Benign

0.17

(source)

DANN

Benign

0.43

PhyloP100

-0.27

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

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