pH Homeostasis of cellular organelles.

نویسنده

  • Nicolas Demaurex
چکیده

An optimal pH is maintained in each secretory and endocytic organelle by the balance between active H(+) pumping and passive H(+) efflux. The progressive acidification of secretory organelles does not reflect an increased proton pumping activity but rather the decreased conduction of a "proton leak" pathway resembling the recently cloned voltage-gated proton channels.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A Fluorescence Microscopy Assay for Monitoring Mitophagy in the Yeast Saccharomyces cerevisiae

Autophagy is important for turnover of cellular components under a range of different conditions. It serves an essential homeostatic function as well as a quality control mechanism that can target and selectively degrade cellular material including organelles. For example, damaged or redundant mitochondria (Fig. 1), not disposed of by autophagy, can represent a threat to cellular homeostasis an...

متن کامل

Proton Transport and pH Control in Fungi.

Despite diverse and changing extracellular environments, fungi maintain a relatively constant cytosolic pH and numerous organelles of distinct lumenal pH. Key players in fungal pH control are V-ATPases and the P-type proton pump Pma1. These two proton pumps act in concert with a large array of other transporters and are highly regulated. The activities of Pma1 and the V-ATPase are coordinated u...

متن کامل

Antimalarial drugs disrupt ion homeostasis in malarial parasites.

Plasmodium chabaudi malaria parasite organelles are major elements for ion homeostasis and cellular signaling and also target for antimalarial drugs. By using confocal imaging of intraerythrocytic parasites we demonstrated that the dye acridine orange (AO) is accumulated into P. chabaudi subcellular compartments. The AO could be released from the parasite organelles by collapsing the pH gradien...

متن کامل

Calcium Homeostasis and Acidocalcisomes in Trypanosoma cruzi

Calcium ion (Ca) is an important second messenger in Trypanosoma cruzi and is essential for invasion of host cells by this parasite. A number of transporters and channels in the plasma membrane, endoplasmic reticulum, and mitochondria regulate cytosolic calcium concentration. Additionally, the T. cruzi genome contains a wide variety of signaling and regulatory proteins that bind calcium as well...

متن کامل

Role of Autophagy in Immunity, Disease and Pathogen Replication

Autophagy is a cellular homeostasis process which plays an important role in energy balance, especially during critical time such as starvation or nutrient stress. It also prevents the accumulation of damaged organelles or misfolded proteins in cytoplasm through lysosomal digestion. Autophagy recycles superfluous or damaged organelles and utilizes their hydrolyzed products for cellular vital fu...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • News in physiological sciences : an international journal of physiology produced jointly by the International Union of Physiological Sciences and the American Physiological Society

دوره 17  شماره 

صفحات  -

تاریخ انتشار 2002