3-51970155-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001146314.2(ABHD14B):c.241C>G(p.Pro81Ala) 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 benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P81S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ABHD14B NM_001146314.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.39

Genes affected

ABHD14B (HGNC:28235): (abhydrolase domain containing 14B) Enables hydrolase activity. Involved in positive regulation of transcription by RNA polymerase II. Located in cytosol; nucleolus; and nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

PCBP4 (HGNC:8652): (poly(rC) binding protein 4) This gene encodes a member of the KH-domain protein subfamily. Proteins of this subfamily, also referred to as alpha-CPs, bind to RNA with a specificity for C-rich pyrimidine regions. Alpha-CPs play important roles in post-transcriptional activities and have different cellular distributions. This gene is induced by the p53 tumor suppressor, and the encoded protein can suppress cell proliferation by inducing apoptosis and cell cycle arrest in G(2)-M. This gene's protein is found in the cytoplasm, yet it lacks the nuclear localization signals found in other subfamily members. Multiple alternatively spliced transcript variants have been described, but the full-length nature for only some has been determined. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.22791114).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ABHD14B	NM_001146314.2	c.241C>G	p.Pro81Ala	missense_variant	3/4	ENST00000361143.10
ABHD14B	NM_032750.3	c.241C>G	p.Pro81Ala	missense_variant	3/4
ABHD14B	NM_001254753.1	c.127C>G	p.Pro43Ala	missense_variant	2/3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ABHD14B	ENST00000361143.10	c.241C>G	p.Pro81Ala	missense_variant	3/4	1	NM_001146314.2	P3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

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

Jul 19, 2023

The c.241C>G (p.P81A) alteration is located in exon 3 (coding exon 2) of the ABHD14B gene. This alteration results from a C to G substitution at nucleotide position 241, causing the proline (P) at amino acid position 81 to be replaced by an alanine (A). 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	0.12
BayesDel_addAF	Uncertain	0.038	T
BayesDel_noAF	Benign	-0.18
Cadd	Uncertain	23
Dann	Benign	0.96
DEOGEN2	Benign	0.068	T;T;T;T;T
Eigen	Benign	-0.026
Eigen_PC	Benign	0.19
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Benign	0.021	T
MetaRNN	Benign	0.23	T;T;T;T;T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	2.0	M;M;M;.;M
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Uncertain	0.50	T
PROVEAN	Uncertain	-3.0	D;D;D;D;D
REVEL	Benign	0.23
Sift	Benign	0.12	T;T;T;T;T
Sift4G	Benign	0.79	T;T;T;T;T
Polyphen		0.0	B;B;B;B;B
Vest4		0.33
MutPred		0.36		Loss of glycosylation at P81 (P = 0.0429);Loss of glycosylation at P81 (P = 0.0429);Loss of glycosylation at P81 (P = 0.0429);Loss of glycosylation at P81 (P = 0.0429);Loss of glycosylation at P81 (P = 0.0429);
MVP		0.81
MPC		0.18
ClinPred		0.87	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.34
gMVP		0.54

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: chr3-52004171;