X-48898538-G-T

Position:

• chrX-48898538-G-T

Variant summary

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

The NM_001032382.2(PQBP1):​c.29G>T​(p.Arg10Leu) 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. 11/19 in silico tools predict a damaging 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. R10C) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 22)
• Consequence: PQBP1 NM_001032382.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.23

Genes affected

PQBP1 (HGNC:9330): (polyglutamine binding protein 1) This gene encodes a nuclear polyglutamine-binding protein that is involved with transcription activation. The encoded protein contains a WW domain. Mutations in this gene have been found in patients with Renpenning syndrome 1 and other syndromes with X-linked cognitive disability. Multiple alternatively spliced transcript variants that encode different protein isoforms have been described for this gene.[provided by RefSeq, Nov 2009]

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, 0.89

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PQBP1	NM_001032382.2	c.29G>T	p.Arg10Leu	missense_variant	2/7	ENST00000447146.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PQBP1	ENST00000447146.7	c.29G>T	p.Arg10Leu	missense_variant	2/7	1	NM_001032382.2	P1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 22

Alfa AF: 0.000111 Hom.: 0

ExAC AF: 0.00000824 AC: 1

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

GeneDx

Nov 28, 2023

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.56	D
BayesDel_noAF	Pathogenic	0.56
CADD	Pathogenic	31
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.63	.;D;D;.;D;D;.
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.96	D;D;.;.;.;.;.
M_CAP	Pathogenic	0.90	D
MetaRNN	Pathogenic	0.89	D;D;D;D;D;D;D
MetaSVM	Uncertain	0.61	D
MutationAssessor	Pathogenic	3.1	M;M;M;M;M;M;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D
PrimateAI	Pathogenic	0.80	D
PROVEAN	Pathogenic	-4.9	D;D;D;D;D;D;D
REVEL	Pathogenic	0.87
Sift	Uncertain	0.0020	D;D;D;D;D;D;D
Sift4G	Uncertain	0.0050	D;D;D;D;D;D;D
Polyphen		0.97	D;D;D;D;D;D;.
Vest4		0.70
MutPred		0.56		Loss of MoRF binding (P = 9e-04);Loss of MoRF binding (P = 9e-04);Loss of MoRF binding (P = 9e-04);Loss of MoRF binding (P = 9e-04);Loss of MoRF binding (P = 9e-04);Loss of MoRF binding (P = 9e-04);Loss of MoRF binding (P = 9e-04);
MVP		0.98
MPC		2.0
ClinPred		0.99	D
GERP RS		5.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.91

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs782035838; hg19: chrX-48755821;