PI3K/Akt/mTOR · target hub
Inositol polyphosphate-4-phosphatase type II B (INPP4B)
INPP4B is a PIP₃ / Akt phosphatase or PP2A regulation on the PI3K/Akt/mTOR axis. INPP4B participates in PI3K/Akt/mTOR signaling—see UniProt and primary literature for isoforms and tissue context. It is indexed under "PIP₃ / inositol lipid phosphatases (negative regulation)" on our pathway page for antibodies, inhibitors, and assay guidance.
| Type / example | Domain / context (brief) |
|---|---|
| Loss-of-function | Loss/truncation; frequent in tumors |
| CN loss | Copy loss or promoter methylation |
| Rare missense | Validate dominant-negative vs hypomorph |
Naming and prevalence vary by cohort and assay—annotate clinically with COSMIC, ClinVar, OncoKB, and datasheets; research context only.
Examples below reflect common literature and public resources (e.g., CCLE, DepMap)—validate genotypes, expression, and passage in your own stocks before committing assays.
Human tissues and primary cells require ethics/IRB approval; tumors are heterogeneous—record histotype, site, and preservation conditions.
Overexpression vs endogenous INPP4B can differ in dosage, splicing, and compartmentation—in organoids/PDX, record passage, matrix, and drug history.
Adds INPP4B keyword bias atop the PI3K/Akt/mTOR antibody pool—if sparse, use presets above or global search.
This content supports research reagents and pathway education—not medical advice. Annotate mutations, drug indications, and protocols with authoritative databases, datasheets, and institutional oversight.
Last reviewed: 2026-05-18
See the PI3K/Akt/mTOR hub for neighboring nodes and assay guidance—cross-check MAPK, RTK, metabolism, and autophagy pages as needed.