Technology 

What does the inner membrane do in the mitochondria?

Joe Ford

What does the inner membrane do in the mitochondria?

The mitochondrial inner membrane is the site of the electron transport chain, an important step in aerobic respiration. Between the inner membrane and outer membrane is the inter-membrane space. There, H+ ions build up to create a proton potential that helps power the ATP energy formation.

What major classes of proteins are found in the inner mitochondrial membrane?

IMM-associated proteins

  • NADH dehydrogenase (ubiquinone)
  • Electron-transferring-flavoprotein dehydrogenase.
  • Electron-transferring flavoprotein.
  • Succinate dehydrogenase.
  • Alternative oxidase.
  • Cytochrome bc1 complex.
  • Cytochrome c.
  • Cytochrome c oxidase.

What is the inner membrane of the mitochondria called?

crista membranes

Does mitochondria have a bilayer?

Mitochondria, like nuclei, have two phospholipid bilayers. The bilayer closest to the cytoplasm, or the outer mitochondrial membrane (OMM, not Om Nom Nom), has integral proteins called porins that allow small molecules to pass freely into the mitochondria.

What is the difference between cristae and inner membrane?

Unlike the outer membrane, the inner membrane does not have pores or channels and is very impermeable. The cristae are the folds created by the inner membrane – or the restaurant booths themselves. The surface area of the cristae can be several times larger than the perimeter of the mitochondria.

What is the main function of cristae in mitochondria?

A crista (/ˈkrɪstə/; plural cristae) is a fold in the inner membrane of a mitochondrion. The name is from the Latin for crest or plume, and it gives the inner membrane its characteristic wrinkled shape, providing a large amount of surface area for chemical reactions to occur on.

What occurs in the cristae of mitochondria?

The mitochondrial cristae are where electrons are passed through the electron transport chain, which pumps protons to power the production of energy molecules called ATP. They bring electrons to the electron transport chain, a series of proteins embedded inside mitochondria.

What is the origin of the cristae within the mitochondria?

The compartmentalization of respiration in mitochondria occurs within cristae, whose evolutionary origin has remained unclear. The widespread nature of purple bacteria among alphaproteobacteria raises the possibility that cristae evolved from photosynthetic ICMs.

What happens in the intermembrane space of mitochondria?

Intermembrane space of mitochondria These two membranes allow the formation of two aqueous compartments, which are the intermembrane space (IMS) and the matrix. Channel proteins called porins in the outer membrane allow free diffusion of ions and small proteins about 5000 daltons or less into the IMS.

How does mitochondrial disease affect the brain?

Features: Brain abnormalities that can result in abnormal muscle tone, ataxia, seizures, impaired vision and hearing, developmental delays, and respiratory problems. Infants with the disease have a poor prognosis.