NM_021822.4:c.1024+55G>C

Variant names:

• chr22-39086622-G-C
• rs17537574
• NM_021822.4:c.1024+55G>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_021822.4(APOBEC3G):​c.1024+55G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000363 in 1,378,988 control chromosomes in the GnomAD database, with no homozygous occurrence. 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: not found (cov: 32)
  • Exomes 𝑓: 0.0000036 (0 hom.)
• Consequence: APOBEC3G NM_021822.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0370
• 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: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	APOBEC3G	NM_021822.4	MANE Select	c.1024+55G>C		intron	N/A	NP_068594.1
	APOBEC3G	NM_001349436.1		c.991+55G>C		intron	N/A	NP_001336365.1
	APOBEC3G	NM_001349437.2		c.823+55G>C		intron	N/A	NP_001336366.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	APOBEC3G	ENST00000407997.4	TSL:1 MANE Select	c.1024+55G>C		intron	N/A	ENSP00000385057.3
	APOBEC3G	ENST00000960612.1		c.1021+58G>C		intron	N/A	ENSP00000630671.1
	APOBEC3G	ENST00000851527.1		c.460+55G>C		intron	N/A	ENSP00000521586.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000363 AC: 5 AN: 1378988 Hom.: 0 AF XY: 0.00000295 AC XY: 2 AN XY: 677060

African (AFR) AF: 0.00 AC: 0 AN: 30788

American (AMR) AF: 0.00 AC: 0 AN: 33962

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 21048

East Asian (EAS) AF: 0.000128 AC: 5 AN: 38942

South Asian (SAS) AF: 0.00 AC: 0 AN: 72998

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50042

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3778

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1070830

Other (OTH) AF: 0.00 AC: 0 AN: 56600

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	0.28
DANN	Benign	0.76
PhyloP100		0.037

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

Other links and lift over

dbSNP: rs17537574; hg19: chr22-39482627;