1. Peroxisomes are organelles surrounded by a single membrane. Soluble proteins that reside within peroxisomes are imported post-translationally, and they often contain the C-terminal tripeptide SKL (serine-lysine-leucine). a) How would you confirm that a C-terminal SKL tripeptide is a peroxisomal targeting signal? b) If cells were engineered to produce a hybrid protein consisting of a mitochondrial matrix protein (including its signal sequence) followed by a C-terminal SKL signal, where in the cell would you expect the hybrid protein to be found? Explain your reasoning.
1. Peroxisomes are organelles surrounded by a single membrane. Soluble proteins that reside within peroxisomes are imported post-translationally, and they often contain the C-terminal tripeptide SKL (serine-lysine-leucine). a) How would you confirm that a C-terminal SKL tripeptide is a peroxisomal targeting signal? b) If cells were engineered to produce a hybrid protein consisting of a mitochondrial matrix protein (including its signal sequence) followed by a C-terminal SKL signal, where in the cell would you expect the hybrid protein to be found? Explain your reasoning.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:1. Peroxisomes are organelles surrounded by a single membrane. Soluble proteins that
reside within peroxisomes are imported post-translationally, and they often contain
the C-terminal tripeptide SKL (serine-lysine-leucine).
a) How would you confirm that a C-terminal SKL tripeptide is a peroxisomal
targeting signal?
b) If cells were engineered to produce a hybrid protein consisting of a mitochondrial
matrix protein (including its signal sequence) followed by a C-terminal SKL
signal, where in the cell would you expect the hybrid protein to be found? Explain
your reasoning.
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