5-173955968-G-A

Position:

• chr5-173955968-G-A

Variant summary

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

The NM_030627.4(CPEB4):​c.2021G>A​(p.Arg674His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CPEB4 NM_030627.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.94

Genes affected

CPEB4 (HGNC:21747): (cytoplasmic polyadenylation element binding protein 4) Enables RNA binding activity. Predicted to be involved in several processes, including cellular response to glucose starvation; negative regulation of cytoplasmic translation; and response to ischemia. Located in cytoplasm and nucleus. Biomarker of liver cirrhosis; portal hypertension; and primary biliary cholangitis. [provided by Alliance of Genome Resources, Apr 2022]

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
CPEB4	NM_030627.4	c.2021G>A	p.Arg674His	missense_variant	10/10	ENST00000265085.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CPEB4	ENST00000265085.10	c.2021G>A	p.Arg674His	missense_variant	10/10	1	NM_030627.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1461818 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727220

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: 0.00

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 provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Clinical Genomics Laboratory, Washington University in St. Louis

Aug 20, 2023

The CPEB4 c.2021G>A (p.Arg674His) variant, to our knowledge, has not been reported in the medical literature. This variant is absent from the general population (gnomAD v.2.1.1), indicating it is not a common variant. Computational predictors are uncertain/conflicting as to the impact of this variant on CPEB4 protein function. Due to limited information, the clinical significance of this variant is uncertain. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.73
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
CADD	Pathogenic	32
DANN	Uncertain	1.0
DEOGEN2	Benign	0.25	T;.;.;T;.
Eigen	Pathogenic	0.92
Eigen_PC	Pathogenic	0.93
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D;D;D;D;D
M_CAP	Benign	0.019	T
MetaRNN	Uncertain	0.57	D;D;D;D;D
MetaSVM	Benign	-0.52	T
MutationAssessor	Benign	1.6	L;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-4.9	D;D;D;D;D
REVEL	Uncertain	0.54
Sift	Uncertain	0.025	D;D;D;D;D
Sift4G	Uncertain	0.0050	D;D;D;D;D
Polyphen		1.0	D;D;D;D;.
Vest4		0.59
MutPred		0.51		Loss of solvent accessibility (P = 0.0364);.;.;.;.;
MVP		0.88
MPC		3.0
ClinPred		1.0	D
GERP RS		6.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.45
gMVP		0.83

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: rs1758363739; hg19: chr5-173382971;