José S Ramalho

Publications64
h-index26
Citations1,937
Highly Influential Citations87
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The Chaperone-Dependent Ubiquitin Ligase CHIP Targets HIF-1α for Degradation in the Presence of Methylglyoxal
Hypoxia-inducible factor-1 (HIF-1) plays a key role in cell adaptation to low oxygen and stabilization of HIF-1 is vital to ensure cell survival under hypoxia. Diabetes has been associated with… Expand
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Rab11b mediates melanin transfer between donor melanocytes and acceptor keratinocytes via coupled exo/endocytosis.
The transfer of melanin from melanocytes to keratinocytes is a crucial process underlying maintenance of skin pigmentation and photoprotection against UV damage. Here, we present evidence supporting… Expand
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Membrane targeting of Rab GTPases is influenced by the prenylation motif.
Rab GTPases are regulators of membrane traffic. Rabs specifically associate with target membranes via the attachment of (usually) two geranylgeranyl groups in a reaction involving Rab escort protein… Expand
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The role of Rab27a in the regulation of melanosome distribution within retinal pigment epithelial cells.
Melanosomes within the retinal pigment epithelium (RPE) of mammals have long been thought to exhibit no movement in response to light, unlike fish and amphibian RPE. Here we show that the… Expand
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Independent degeneration of photoreceptors and retinal pigment epithelium in conditional knockout mouse models of choroideremia.
Choroideremia (CHM) is an X-linked degeneration of the retinal pigment epithelium (RPE), photoreceptors, and choroid, caused by loss of function of the CHM/REP1 gene. REP1 is involved in lipid… Expand
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A coiled-coil domain of melanophilin is essential for Myosin Va recruitment and melanosome transport in melanocytes.
Melanophilin (Mlph) regulates retention of melanosomes at the peripheral actin cytoskeleton of melanocytes, a process essential for normal mammalian pigmentation. Mlph is proposed to be a modular… Expand
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STUB1/CHIP is required for HIF1A degradation by chaperone-mediated autophagy
The transcription factor HIF1 is mostly regulated by the oxygen-dependent proteasomal degradation of the labile subunit HIF1A. Recent data showed degradation of HIF1A in the lysosome through… Expand
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A Rab3a-dependent complex essential for lysosome positioning and plasma membrane repair
Encarnação et al. show that Rab3a, together with its newly identified effector NMHC IIA, mediates the positioning of peripheral lysosomes in nonsecretory cells, thereby promoting lysosome exocytosis… Expand
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The small GTPase Rab11 co-localizes with α-synuclein in intracellular inclusions and modulates its aggregation, secretion and toxicity.
Alpha-synuclein (aSyn) misfolding and aggregation are pathological features common to several neurodegenerative diseases, including Parkinson's disease (PD). Mounting evidence suggests that aSyn can… Expand
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Host cell autophagy contributes to Plasmodium liver development
Autophagy plays an important role in the defence against intracellular pathogens. However, some microorganisms can manipulate this host cell pathway to their advantage. In this study, we addressed… Expand
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