ArticleThe Journal of cell biology2022
Type II phosphatidylinositol 4-kinases function sequentially in cargo delivery from early endosomes to melanosomes.
Article in The Journal of cell biology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
What it found
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Who cites it
14 citing papers in PubMed, 18 citations in OpenAlex.
- Endosomes as central hubs of interorganellar communication and cellular homeostasis.Protein & cell · 2026Review
- BLOC1S1 variants cause lysosomal and autophagic defects resulting in a hypomyelinating leukodystrophy with epileptic encephalopathy.American journal of human genetics · 2026Article
- Comparative Phosphoproteomics of TwoJournal of fungi (Basel, Switzerland) · 2026Article
- Functional and Morphological Plasticity of the Endolysosomal System: Pigment Organelles at the Crossroads of Physiology and Pathology.Biology of the cell · 2025Review
- BLOC-1 and BORC: Complex regulators of endolysosomal dynamics.Cell chemical biology · 2025Review
- Reprogramming of endolysosomes for melanogenesis in BLOC-1-deficient melanocytes.Current biology : CB · 2025Article
- Phosphatidylinositol 4-phosphate; A minor lipid with multiple personalities.Biochimica et biophysica acta. Molecular and cell biology of lipids · 2025Review
- Insights into lysosome-related organelle biogenesis: melanosome as a model organelle.Frontiers in cell and developmental biology · 2025Article
- Assembly and fission of tubular carriers mediating protein sorting in endosomes.Nature reviews. Molecular cell biology · 2024Review
- Evoked Weibel-Palade Body Exocytosis Modifies the Endothelial Cell Surface by Releasing a Substrate-Selective Phosphodiesterase.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2024Article
- The biochemistry of melanogenesis: an insight into the function and mechanism of melanogenesis-related proteins.Frontiers in molecular biosciences · 2024Review
- Arf1-PI4KIIIβ positive vesicles regulate PI(3)P signaling to facilitate lysosomal tubule fission.The Journal of cell biology · 2023Article
- A Comprehensive Review of Mammalian Pigmentation: Paving the Way for Innovative Hair Colour-Changing Cosmetics.Biology · 2023Review
- PI4P and BLOC-1 remodel endosomal membranes into tubules.The Journal of cell biology · 2022Article
Corrections and comments
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Authors and funding
7 authors at 2 institutions in 2 countries.
Funding
Abstract
Melanosomes are pigment cell-specific lysosome-related organelles in which melanin pigments are synthesized and stored. Melanosome maturation requires delivery of melanogenic cargoes via tubular transport carriers that emanate from early endosomes and that require BLOC-1 for their formation. Here we show that phosphatidylinositol-4-phosphate (PtdIns4P) and the type II PtdIns-4-kinases (PI4KIIα and PI4KIIβ) support BLOC-1-dependent tubule formation to regulate melanosome biogenesis. Depletion of either PI4KIIα or PI4KIIβ with shRNAs in melanocytes reduced melanin content and misrouted BLOC-1-dependent cargoes to late endosomes/lysosomes. Genetic epistasis, cell fractionation, and quantitative live-cell imaging analyses show that PI4KIIα and PI4KIIβ function sequentially and non-redundantly downstream of BLOC-1 during tubule elongation toward melanosomes by generating local pools of PtdIns4P. The data show that both type II PtdIns-4-kinases are necessary for efficient BLOC-1-dependent tubule elongation and subsequent melanosome contact and content delivery during melanosome biogenesis. The independent functions of PtdIns-4-kinases in tubule extension are downstream of likely redundant functions in BLOC-1-dependent tubule initiation.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.