6-136155714-C-A

Position:

• chr6-136155714-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_018945.4(PDE7B):​c.667C>A​(p.Pro223Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PDE7B NM_018945.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.91

Genes affected

PDE7B (HGNC:8792): (phosphodiesterase 7B) The 3',5'-cyclic nucleotides cAMP and cGMP function as second messengers in a wide variety of signal transduction pathways. 3',5'-cyclic nucleotide phosphodiesterases (PDEs) catalyze the hydrolysis of cAMP and cGMP to the corresponding 5'-monophosphates and provide a mechanism to downregulate cAMP and cGMP signaling. This gene encodes a cAMP-specific phosphodiesterase, a member of the cyclic nucleotide phosphodiesterase family.[provided by RefSeq, Apr 2009]

PDE7B-AS1 (HGNC:56334): (PDE7B antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.845

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PDE7B	NM_018945.4	c.667C>A	p.Pro223Thr	missense_variant	8/13	ENST00000308191.11	NP_061818.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PDE7B	ENST00000308191.11	c.667C>A	p.Pro223Thr	missense_variant	8/13	1	NM_018945.4	ENSP00000310661.6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000151

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 23, 2024

The c.667C>A (p.P223T) alteration is located in exon 8 (coding exon 8) of the PDE7B gene. This alteration results from a C to A substitution at nucleotide position 667, causing the proline (P) at amino acid position 223 to be replaced by a threonine (T). 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	0.20
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.21
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.56	D;D
Eigen	Uncertain	0.52
Eigen_PC	Uncertain	0.62
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D;D
M_CAP	Benign	0.068	D
MetaRNN	Pathogenic	0.85	D;D
MetaSVM	Benign	-0.51	T
MutationAssessor	Benign	1.0	L;.
PrimateAI	Pathogenic	0.80	D
PROVEAN	Pathogenic	-5.5	D;.
REVEL	Pathogenic	0.76
Sift	Uncertain	0.027	D;.
Sift4G	Benign	0.30	T;T
Polyphen		0.87	P;P
Vest4		0.71
MutPred		0.52		Loss of methylation at K227 (P = 0.1208);.;
MVP		0.62
MPC		1.0
ClinPred		0.99	D
GERP RS		5.7
Varity_R		0.63
gMVP		0.48

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

LitVar

Other links and lift over

dbSNP: rs1041840800; hg19: chr6-136476852;