Question

The majority of proteins are imported into the peroxisome via translocation. What other mechanism do peroxisomes use to gain their proteins?

Answer 1

In the eukaryotic cells the organelles called Peroxisomes are found and present in almost all eukaryotic cells. The organelles are surrounded by a single and spherical membrane.Enzymes present in these organelles are involve to catalyze mostly oxidation reactions.

As the peroxisomes are single-membrane structure so that they are able to directly import their matrix and membrane proteins from the cytosol. Not all but some protens present in peroxisomial memebrane (PMPs) synthesized on free polysomes and peroxisomes import it from the cytosol .The matrix proteins present in peroxisomes are nuclear encoded and these proteins are synthesized on free polyribosomes.In translocation system matrix proteins in peroxisomes having targeting signals and these signals are recognized by receptors and these receptors are deliver them to there membrane site for translocation. There is consumption of energy in translocation actually it is ATP dependent process.

Most, but not all, peroxisomal membrane proteins (PMPs) are believed to be synthesized on free polysomes and then transported from the cytosol directly to the peroxisomes.