X-linked intellectual disability, Porteous type

Summary

X-linked intellectual disability, Porteous type (MONDO:0019766) is a disease with 1 cohort gene.

At a glance

• Cohort genes: 1
• Phenotypes (HPO): 14

Clinical features

Signs & symptoms

Clinical features (HPO)

14 HPO clinical features (Orphanet curated; top 14 by frequency):

HPO ID	Term	Frequency
HP:0001256	Intellectual disability, mild	Very frequent (80-99%)
HP:0001263	Global developmental delay	Very frequent (80-99%)
HP:0000275	Narrow face	Frequent (30-79%)
HP:0000276	Long face	Frequent (30-79%)
HP:0000303	Mandibular prognathia	Frequent (30-79%)
HP:0000322	Short philtrum	Frequent (30-79%)
HP:0000327	Hypoplasia of the maxilla	Frequent (30-79%)
HP:0000378	Cupped ear	Frequent (30-79%)
HP:0000400	Macrotia	Frequent (30-79%)
HP:0000414	Bulbous nose	Frequent (30-79%)
HP:0000486	Strabismus	Frequent (30-79%)
HP:0002292	Frontal balding	Frequent (30-79%)
HP:0004322	Short stature	Frequent (30-79%)
HP:0004325	Decreased body weight	Frequent (30-79%)

Identifiers

Disease identifiers

Field	Value
Canonical name	X-linked intellectual disability, Porteous type
Mondo ID	MONDO:0019766
Orphanet	93945
UMLS	C5681616
MedGen	1842708
GARD	0019239
Is cancer (heuristic)	no

Data availability: 1 GenCC gene-disease record.

Disease family

Classification path: disease › human disease › disease by body system or component › nervous system disorder › neurodevelopmental disorder › intellectual disability › syndromic intellectual disability › X-linked syndromic intellectual disability › Renpenning syndrome › X-linked intellectual disability, Porteous type

Related subtypes (3): hamel cerebro-palato-cardiac syndrome, X-linked intellectual disability, Golabi-Ito-hall type, X-linked intellectual disability, Sutherland-Haan type

Genetics & variants

GWAS landscape

No GWAS associations recorded — common-variant (GWAS) studies don’t cover this disease (typical for Mendelian / rare diseases). See the curated gene cohort and Mendelian overlap below.

Variant details and genetic-evidence tiers

No tiered GWAS variants or ClinVar records for this disease.

Genes & proteins

Mendelian disease overlap and somatic drivers

GenCC: 8 · Orphanet: 4 · OMIM-shared: 0 · Dual-evidence (GWAS+Mendelian): 0

GenCC gene–disease validity (cohort genes)

the Disease column is the GenCC-asserted condition — a cohort gene’s strongest validity may be for a related predisposition syndrome.

Gene	Classification	Inheritance	Disease	Records
PQBP1	Supportive	X-linked	X-linked intellectual disability, Porteous type	8

Orphanet rare-disease linkage (cohort genes)

Gene	Orphanet ID	Rare disease
PQBP1	Orphanet:93945	X-linked intellectual disability, Porteous type
PQBP1	Orphanet:93946	Hamel cerebro-palato-cardiac syndrome
PQBP1	Orphanet:93947	X-linked intellectual disability, Golabi-Ito-Hall type
PQBP1	Orphanet:93950	X-linked intellectual disability, Sutherland-Haan type

Cohort genes → proteins

1 cohort genes, 1 distinct canonical proteins.

Evidence partition

Subset	Genes
multi_evidence	1

Cohort genes (full)

Symbol	HGNC	Ensembl	UniProt	Name	Evidence
PQBP1	HGNC:9330	ENSG00000102103	O60828	Polyglutamine-binding protein 1	gencc

Cohort function summary

Lead sentence per gene, UniProt-curated.

Symbol	Protein name	Function (lead sentence)
PQBP1	Polyglutamine-binding protein 1	Intrinsically disordered protein that acts as a scaffold, and which is involved in different processes, such as pre-mRNA splicing, transcription regulation, innate immunity and neuron development.

Protein-family classification

Druggable: 0 · Difficult: 1 · Unknown: 0 · Druggable fraction: 0.0

Family distribution

Cohort families vs a genome-wide background (hypergeometric, BH-FDR; fold = observed/expected). Counts kept; sorted by enrichment, so the catch-all Other/Unknown bucket no longer leads.

Family	Genes	Fold	FDR
Scaffold/PPI	1	17.3×	0.058

Per-gene assignment

Symbol	Family	Druggable?	EC	InterPro (top 3)
PQBP1	Scaffold/PPI	no		WW_dom, WW_dom_sf

Expression context

Cohort genes with no expression data: 0.

1 cohort gene are a single-cell marker in ≥1 SCXA experiment.

Breadth distribution (Bgee present_calls)

Bucket	Genes
narrow (1-5 tissues)	0
moderate (6-20)	0
broad (>20)	1
unknown	0

Top tissues across cohort

Tissue	Cohort genes
cerebellar hemisphere	1
left ovary	1
right ovary	1

Per-gene tissue summary (top 30)

Symbol	Bgee breadth	FANTOM5 breadth	SCXA	Top tissues
PQBP1	292	ubiquitous	marker	left ovary, right ovary, cerebellar hemisphere

Protein interactions among cohort

Intra-cohort edges: 0.

Hub genes (top 10 by interactor count)

Symbol	Interactor count
PQBP1	1,556

Structural data

PDB: 1 · AlphaFold-only: 0 · No structure: 0

Cohort genes with PDB structures (top 30)

Symbol	UniProt	PDB entries
PQBP1	O60828	3

Function

Pathway analysis

Distinct Reactome pathways touched by cohort: 2. Enrichment computed across 1 evidence-associated genes (1 with Reactome annotation).

Pathways by enrichment

Over-representation of cohort genes vs the genome-wide background (hypergeometric test, Benjamini-Hochberg FDR; fold = observed/expected over 1 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.

Pathway	Cohort genes	Fold	FDR	Sample cohort genes
mRNA Splicing - Major Pathway	1	54.6×	0.022	PQBP1
Dengue Virus-Host Interactions	1	45.7×	0.022	PQBP1

GO biological processes by enrichment

Over-representation of cohort genes vs the genome-wide background (hypergeometric test, Benjamini-Hochberg FDR; fold = observed/expected over 1 annotated cohort genes). Counts and members are kept as ground-truth; sorted by enrichment.

GO term	Cohort genes	Fold	FDR	Sample cohort genes
cellular response to exogenous dsRNA	1	1053.2×	0.004	PQBP1
regulation of dendrite morphogenesis	1	732.7×	0.004	PQBP1
alternative mRNA splicing, via spliceosome	1	674.1×	0.004	PQBP1
positive regulation of defense response to virus by host	1	526.6×	0.004	PQBP1
activation of innate immune response	1	481.5×	0.004	PQBP1
positive regulation of type I interferon production	1	421.3×	0.004	PQBP1
regulation of RNA splicing	1	218.9×	0.007	PQBP1
neuron projection development	1	122.1×	0.011	PQBP1
defense response to virus	1	69.3×	0.018	PQBP1
innate immune response	1	33.6×	0.032	PQBP1
regulation of DNA-templated transcription	1	31.6×	0.032	PQBP1

Therapeutics

Drug target analysis

Approved (phase 4): 0 · Phase ≥3: 0 · Phased (≥1): 0 · Undrugged: 1

Druggability breadth: 0 of 1 evidence-associated genes (0%) have a ChEMBL target (buckets above are over the deeply-mined display cohort).

Top cohort targets by molecule count

Symbol	Molecules	Max phase
PQBP1	0	0

Bioactivity and enzyme data

Enzyme cohort genes (≥1 EC): 0.

Pharmacogenomics

Cohort genes with a PharmGKB record: 1; with CPIC/DPWG dosing guidelines: 0.

No cohort gene has a CPIC/DPWG genotype-guided dosing guideline (PharmGKB).

Chemical tractability of cohort targets

0 approved/phased compounds have measured bioactivity against a cohort gene (and aren’t yet in disease-level trials). This is a research / tractability signal, NOT a therapeutic recommendation — a bioactivity row often reflects off-target or screening binding (e.g. promiscuous kinase inhibitors against a cohort kinase), implying no disease mechanism.

Druggability pyramid

Cohort genes binned by druggability tier (high → low):

Tier	Definition	Genes	Symbols
A	Approved (phase 4 drug)	0
B	Phased (≥1) drug, not yet approved	0
C	Druggable family + PDB, no drug	0
D	Druggable family + AlphaFold only, no drug	0
E	Difficult family or no structure, no drug	1	PQBP1

Undrugged target profiles

1 cohort genes are undrugged. Ranked by ‘starting-point quality’ (assay depth + drugged-partner adjacency).

Symbol	ChEMBL assays	Drugged partners (top 3)
PQBP1	0	—

Clinical trials & evidence

Clinical trials

Clinical trials: 0.