1-66372428-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_002600.4(PDE4B):c.1961G>A(p.Ser654Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,714 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: PDE4B NM_002600.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 10.0

Genes affected

PDE4B (HGNC:8781): (phosphodiesterase 4B) This gene is a member of the type IV, cyclic AMP (cAMP)-specific, cyclic nucleotide phosphodiesterase (PDE) family. The encoded protein regulates the cellular concentrations of cyclic nucleotides and thereby play a role in signal transduction. Altered activity of this protein has been associated with schizophrenia and bipolar affective disorder. Alternative splicing and the use of alternative promoters results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PDE4B	NM_002600.4	c.1961G>A	p.Ser654Asn	missense_variant	17/17	ENST00000341517.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PDE4B	ENST00000341517.9	c.1961G>A	p.Ser654Asn	missense_variant	17/17	1	NM_002600.4	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461714 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727170

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 17, 2022

The c.1961G>A (p.S654N) alteration is located in exon 17 (coding exon 16) of the PDE4B gene. This alteration results from a G to A substitution at nucleotide position 1961, causing the serine (S) at amino acid position 654 to be replaced by an asparagine (N). 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	Uncertain	0.36
BayesDel_addAF	Uncertain	0.042	T
BayesDel_noAF	Benign	-0.18
Cadd	Uncertain	25
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.67	D;D;.;.;.
Eigen	Uncertain	0.37
Eigen_PC	Uncertain	0.50
FATHMM_MKL	Uncertain	0.95	D
M_CAP	Benign	0.015	T
MetaRNN	Uncertain	0.47	T;T;T;T;T
MetaSVM	Benign	-0.62	T
MutationAssessor	Uncertain	2.6	M;M;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Pathogenic	0.79	T
PROVEAN	Uncertain	-2.6	D;D;D;D;D
REVEL	Uncertain	0.31
Sift	Benign	0.036	D;D;D;D;D
Sift4G	Benign	0.074	T;T;T;T;T
Polyphen		0.0010	B;B;B;.;.
Vest4		0.61
MutPred		0.25		Loss of phosphorylation at S654 (P = 0.0884);Loss of phosphorylation at S654 (P = 0.0884);.;.;.;
MVP		0.57
MPC		0.72
ClinPred		0.98	D
GERP RS		5.1
Varity_R		0.78

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-66838111;