chr22-36227796-T-A

Variant names:

• chr22-36227796-T-A
• rs368403887
• NM_030882.4:c.622A>T

Variant summary

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

The NM_030882.4(APOL2):​c.622A>T​(p.Thr208Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,884 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 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 variant affecting the same amino acid position, but resulting in a different missense (i.e. T208I) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: APOL2 NM_030882.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.107
• Publications: 0 publications found

Genes affected

APOL2 (HGNC:619): (apolipoprotein L2) This gene is a member of the apolipoprotein L gene family. The encoded protein is found in the cytoplasm, where it may affect the movement of lipids or allow the binding of lipids to organelles. Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jul 2008]

APOL2 Gene-Disease associations (from GenCC):

• schizophrenia

  Inheritance: AD Classification: NO_KNOWN Submitted by: Labcorp Genetics (formerly Invitae)

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 (MetaRNN=0.030838192).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_030882.4. 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
	APOL2	NM_030882.4	MANE Select	c.622A>T	p.Thr208Ser	missense	Exon 5 of 5	NP_112092.2	Q9BQE5
	APOL2	NM_145637.3		c.622A>T	p.Thr208Ser	missense	Exon 6 of 6	NP_663612.2	Q9BQE5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	APOL2	ENST00000358502.10	TSL:1 MANE Select	c.622A>T	p.Thr208Ser	missense	Exon 5 of 5	ENSP00000351292.5	Q9BQE5
	APOL2	ENST00000249066.10	TSL:1	c.622A>T	p.Thr208Ser	missense	Exon 6 of 6	ENSP00000249066.6	Q9BQE5
	APOL2	ENST00000451256.6	TSL:2	c.958A>T	p.Thr320Ser	missense	Exon 6 of 6	ENSP00000403153.2	J3KQL8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461884 Hom.: 0 Cov.: 35 AF XY: 0.00000138 AC XY: 1 AN XY: 727244

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53412

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1112010

Other (OTH) AF: 0.00 AC: 0 AN: 60396

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.082
BayesDel_addAF	Benign	-0.37	T
BayesDel_noAF	Benign	-0.76
CADD	Benign	0.0030
DANN	Benign	0.10
DEOGEN2	Benign	0.0052	T
Eigen	Benign	-2.1
Eigen_PC	Benign	-2.1
FATHMM_MKL	Benign	0.00039	N
LIST_S2	Benign	0.23	T
M_CAP	Benign	0.0035	T
MetaRNN	Benign	0.031	T
MetaSVM	Benign	-0.96	T
PhyloP100		-0.11
PrimateAI	Benign	0.31	T
PROVEAN	Benign	1.6	N
REVEL	Benign	0.019
Sift	Benign	1.0	T
Sift4G	Benign	1.0	T
Vest4		0.011
MutPred		0.49		Gain of MoRF binding (P = 0.1211)
MVP		0.17
MPC		0.062
ClinPred		0.052	T
GERP RS		-3.7
gMVP		0.078
Mutation Taster		=100/0	polymorphism

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: rs368403887; hg19: chr22-36623842;