NM_021822.4:c.708C>A

Variant names:

• chr22-39083857-C-A
• rs368345672
• NM_021822.4:c.708C>A

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_021822.4(APOBEC3G):​c.708C>A​(p.Asn236Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: APOBEC3G NM_021822.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.211
• Publications: 0 publications found

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]

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.26519054).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_021822.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	APOBEC3G	NM_021822.4	MANE Select	c.708C>A	p.Asn236Lys	missense	Exon 5 of 8	NP_068594.1	Q9HC16-1
	APOBEC3G	NM_001349436.1		c.675C>A	p.Asn225Lys	missense	Exon 5 of 8	NP_001336365.1
	APOBEC3G	NM_001349437.2		c.507C>A	p.Asn169Lys	missense	Exon 4 of 7	NP_001336366.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	APOBEC3G	ENST00000407997.4	TSL:1 MANE Select	c.708C>A	p.Asn236Lys	missense	Exon 5 of 8	ENSP00000385057.3	Q9HC16-1
	APOBEC3G	ENST00000960612.1		c.708C>A	p.Asn236Lys	missense	Exon 5 of 8	ENSP00000630671.1
	APOBEC3G	ENST00000851527.1		c.172-2422C>A		intron	N/A	ENSP00000521586.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.25
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.64
CADD	Benign	0.50
DANN	Benign	0.58
DEOGEN2	Benign	0.011	T
Eigen	Benign	-0.90
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.030	N
LIST_S2	Benign	0.44	T
M_CAP	Benign	0.021	T
MetaRNN	Benign	0.27	T
MetaSVM	Benign	-0.96	T
MutationAssessor	Benign	0.92	L
PhyloP100		-0.21
PROVEAN	Benign	-1.8	N
REVEL	Benign	0.14
Sift	Benign	0.036	D
Sift4G	Benign	0.090	T
Polyphen		0.78	P
Vest4		0.11
MutPred		0.66		Gain of methylation at N236 (P = 0.0224)
MVP		0.47
MPC		0.59
ClinPred		0.23	T
GERP RS		-0.49
Varity_R		0.31
gMVP		0.18
Mutation Taster		=93/7	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs368345672; hg19: chr22-39479862;