Genetic Variant NM_004643.4:c.27_32dupAGCAGC (chr14-23321490-G-GGCAGCA) – ACMG Classification: Likely_benign (-1 pts)

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BS2_Supporting

The NM_004643.4(PABPN1):c.27_32dupAGCAGC(p.Ala10_Ala11dup) variant causes a disruptive inframe insertion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000501 in 1,198,112 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000048 ( 0 hom. )

Consequence

PABPN1
NM_004643.4 disruptive_inframe_insertion

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.57

Publications

0 publications found

Variant links:

Genes affected

PABPN1 (HGNC:8565): (poly(A) binding protein nuclear 1) This gene encodes an abundant nuclear protein that binds with high affinity to nascent poly(A) tails. The protein is required for progressive and efficient polymerization of poly(A) tails at the 3' ends of eukaryotic transcripts and controls the size of the poly(A) tail to about 250 nt. At steady-state, this protein is localized in the nucleus whereas a different poly(A) binding protein is localized in the cytoplasm. This gene contains a GCG trinucleotide repeat at the 5' end of the coding region, and expansion of this repeat from the normal 6 copies to 8-13 copies leads to autosomal dominant oculopharyngeal muscular dystrophy (OPMD) disease. Related pseudogenes have been identified on chromosomes 19 and X. Read-through transcription also exists between this gene and the neighboring upstream BCL2-like 2 (BCL2L2) gene. [provided by RefSeq, Dec 2010]

PABPN1 links:

BCL2L2-PABPN1 (HGNC:42959): (BCL2L2-PABPN1 readthrough) This locus represents naturally occurring read-through transcription between the neighboring BCL2L2 (BCL2-like 2) and PABPN1 (poly(A) binding protein, nuclear 1) genes on chromosome 14. The read-through transcript encodes a fusion protein that shares sequence identity with each individual gene product. [provided by RefSeq, Dec 2010]

BCL2L2-PABPN1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

BS2

High AC in GnomAdExome4 at 5 AD gene. Variant has AC lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PABPN1	NM_004643.4 link	c.27_32dupAGCAGC	p.Ala10_Ala11dup	disruptive_inframe_insertion	Exon 1 of 7	ENST00000216727.9	NP_004634.1	Q86U42-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PABPN1	ENST00000216727.9 link	c.27_32dupAGCAGC	p.Ala10_Ala11dup	disruptive_inframe_insertion	Exon 1 of 7	1	NM_004643.4	ENSP00000216727.4		Q86U42-1
BCL2L2-PABPN1	ENST00000553781.5 link	c.433-685_433-680dupAGCAGC		intron_variant	Intron 3 of 8	2		ENSP00000451320.1		Q92843-2

Frequencies

GnomAD3 genomes

AF:

0.00000663

AC:

AN:

150828

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000148

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000477

AC:

AN:

1047284

Hom.:

Cov.:

AF XY:

0.0000101

AC XY:

AN XY:

497094

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

21354

American (AMR)

AF:

0.00

AC:

AN:

7034

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

12336

East Asian (EAS)

AF:

0.00

AC:

AN:

22638

South Asian (SAS)

AF:

0.00

AC:

AN:

19364

European-Finnish (FIN)

AF:

0.00

AC:

AN:

23230

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2728

European-Non Finnish (NFE)

AF:

0.00000557

AC:

AN:

898012

Other (OTH)

AF:

0.00

AC:

AN:

40588

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000663

AC:

AN:

150828

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

73640

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41274

American (AMR)

AF:

0.00

AC:

AN:

15136

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3460

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10050

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.0000148

AC:

AN:

67608

Other (OTH)

AF:

0.00

AC:

AN:

2070

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

1.6

Mutation Taster

=77/23

polymorphism

(source)

Splicing

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

Publications

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NM_004643.4:c.27_32dupAGCAGC

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over