chr6-28296835-A-G

Variant names:

• chr6-28296835-A-G
• NM_032507.4:c.662A>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_032507.4(PGBD1):​c.662A>G​(p.Glu221Gly) 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. 14/24 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PGBD1 NM_032507.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.56
• Publications: 0 publications found

Genes affected

PGBD1 (HGNC:19398): (piggyBac transposable element derived 1) The piggyBac family of proteins, found in diverse animals, are transposases related to the transposase of the canonical piggyBac transposon from the moth, Trichoplusia ni. This family also includes genes in several genomes, including human, that appear to have been derived from the piggyBac transposons. This gene belongs to the subfamily of piggyBac transposable element derived (PGBD) genes. The PGBD proteins appear to be novel, with no obvious relationship to other transposases, or other known protein families. This gene product is specifically expressed in the brain, however, its exact function is not known. Alternative splicing results in multiple transcript variants encoding the same protein.[provided by RefSeq, May 2010]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PGBD1	NM_032507.4	c.662A>G	p.Glu221Gly	missense_variant	Exon 5 of 7	ENST00000682144.1	NP_115896.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PGBD1	ENST00000682144.1	c.662A>G	p.Glu221Gly	missense_variant	Exon 5 of 7		NM_032507.4	ENSP00000506997.1
PGBD1	ENST00000259883.3	c.662A>G	p.Glu221Gly	missense_variant	Exon 5 of 7	1		ENSP00000259883.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

May 23, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.662A>G (p.E221G) alteration is located in exon 5 (coding exon 4) of the PGBD1 gene. This alteration results from a A to G substitution at nucleotide position 662, causing the glutamic acid (E) at amino acid position 221 to be replaced by a glycine (G). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.070
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.57
CADD	Benign	18
DANN	Uncertain	0.99
DEOGEN2	Benign	0.0075	T
Eigen	Benign	-0.51
Eigen_PC	Benign	-0.44
FATHMM_MKL	Benign	0.46	N
LIST_S2	Benign	0.43	T
M_CAP	Benign	0.0022	T
MetaRNN	Benign	0.095	T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	1.4	L
PhyloP100		1.6
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-1.1	N
REVEL	Benign	0.038
Sift	Benign	0.13	T
Sift4G	Benign	0.15	T
Polyphen		0.0030	B
Vest4		0.25
MutPred		0.43		Loss of solvent accessibility (P = 0.0128);
MVP		0.25
ClinPred		0.20	T
GERP RS		2.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.1
Varity_R		0.070
gMVP		0.30
Mutation Taster		=98/2	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.25		Details are displayed if max score is > 0.2
DS_AL_spliceai		0.25		Position offset: -19

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

Other links and lift over

hg19: chr6-28264612;