- Home
- Show all categories
- Spring 2017 Getting Started
- General, Non-Lecture-Specific Questions
- Domains of Life; Prokaryotic vs. Eukaryotic Cells
- Carbohydrates
- Proteins and Enzymes
- Nucleic Acid Structure and General Features
- Lipids and Biomembranes
- Energy and Metabolism
- DNA Structure and Replication
- Transcription and RNA Processing
- Translation
- The Nucleus and its Functional Domains
- Mutations
- Nucleo-Cytoplasmic Exchange
- Mitochondria
- Endoplasmic Reticulum
- Golgi Apparatus
- Lysosomes
- Actin and Myosin
- Microtubules
- The Cell Cycle and Events of M-Phase
- Genetic Regulation and the Lactose Operon
- Mobil Genetic Elements -- Viruses and Plasmids
- Genetic Engineering and Recombinant DNA Technology
- Sitemap
Questions in Nucleo-Cytoplasmic Exchange
Page 1 out of 6 Pages
- I know you said that GTP hydroylsis for the exportin occurs in the cytoplasm, but does it also occur there for importin?(17991 views)
- Do the cytoplasmic filaments recognize the materials that need to come into a cell, and the nuclear basket recognize the mature mRNA that needs to be exported?(16667 views)
- Does mRNA have a NES, or is it only the shuttle proteins that coat the mRNA that have the NES? I ask because there is a homework question asking if mRNAs have a NES. I'm not really sure how specific the answer should be.(26165 views)
- On the lecture discussing the nuclear pore complex, I understand that proteins are imported because they have the correct signal. So when a molecule does not present a signal, does the nuclear pore complex close?(16731 views)
- I was looking through my notes and I wanted to clarify a question I had. Importin shuttles a protein into the nucleus via the nuclear pore complex correct? So, does this mean importin shuttles the protein to the nuclear pore complex which then recognizes it and allows it to pass into the nucleus? Or importin shuttles the protein to the nucleus and the protein just has to go through the nuclear pore complex to get into the nucleus? Let me know if this question is too confusing or doesn't make any sense.(18696 views)
- What is the purpose of the poly-A binding protein, the 5' cap binding protein, and the nuclear transport receptor? Also, how do they aid in allowing the mRNA to cross the nuclear pore complex?(17605 views)
- Just curious about the shuttle proteins (importin and exportin). Since they can get in and out of the nucleus, that means they must have their own NLS and NES, right? Because Exportin seems to get into the nucleus all by itself, thus there must be some reason how it manages to do that. I'm just trying to see whether the "signal rule" applies for all proteins; even the ones that carry other proteins.(19995 views)
- I know that cytoplasmic filaments recognize materials that need to be imported into the nucleus, but bo the cytoplasmic rings also assist in this recognition? If they do not .. what function do serve?(15953 views)
- With regard to importin and exportin, I know that GTP hydrolysis is used to recycle the carrier proteins, but why does GTP hydrolysis occur in the cytoplasm?(16744 views)
- I am having some trouble understanding exactly what makes an importin release the cargo protein once inside the nucleus. I know that the energy from GTP hydrolysis in the cytoplasm is is used for recycling that importin so that it will start another round of importing proteins or other things. But once the importin is inside the nucleus, what makes it let go of the NLS of the protein? Do they just no longer recognize the NLS once inside the nucleus? Or is it just their job to disassemble once inside the nucleus? I'm not sure I understand why the importin just lets go of the cargo protein.(17420 views)