click below
click below
Normal Size Small Size show me how
BIS 104 Final
Last minute important info.
| Question | Answer |
|---|---|
| Protein that prevents polymerization of ACTIN? | Thymosin |
| What energy unit does ACTIN use to polymerize? | ATP |
| What energy unit do MICROTUBULES use to polymerize? | GTP |
| What protein helps ACTIN polymerize? | Prolifin |
| What protein stabilizes MICROTUBULES so it doesn't disassemble? | MAPS (microtubule associated proteins) |
| How does GTP-gamma-S work on MICROTUBULES? | The Sulfur form of GTP cannot be hydrolyzed- so the microtubles keep conformation. DOES NOT DO THIS WITH ACTIN |
| Which filaments have polarity, which do not? | Polarity: microtubules, actin. No polarity: intermediate filaments. |
| When a vesicle is TETHERING, what two parts compliment? | Rab proteins and Rab effector proteins (tethering proteins) |
| When a vesicle is DOCKING, what two parts compliment? | V-snare (on vesicle), and T-snare (on membrane) |
| Organizations of ACTIN filament? (3) | 1. contractile bundles 2. Gel-like network 3. Tight parallel bundle |
| What protein is found in TIGHT BUNDLES? | Fimbrin |
| What protein is found in CONTRACTILE BUNDLES? | alpha-actin |
| What protein is found in LAMELLIPODIA? | Filamin |
| What protein is bind PERIPERAL MEMBRANE PROTEINS? | Spectrin |
| Caged florescence: | If marker gets further from the bacterium, then the bacterium is assembling actin closest to it. (not furthest) |
| MIcrotubulalr-dependent motor proteins: (2) | KInesin, Dyeins |
| Kinesins | motor protein dependant on microtubules. Moves toward PLUS end. Faster |
| Dyneins | motor protein dependant on microtubules. Moves toward MINUS end. Slower |
| 4 components of signal transduction: | 1. signal, 2. receptor, 3. transducer, 4. Intracellular target. |
| G-protein coupled receptors use what kind of energy? | GTP |
| Alpha-subunits of G proteins we discussed: | G-s, G-olf, G-t, G-q |
| What is the primary target of G-s? | Adenylate cyclase |
| What is the primary target of G-olf? | Adenylate cyclase |
| What is the primary target of G-q? | Phospholipase- C -B |
| What is the primary target of G-t? | Cyclic GMP Phosphodiesterase |
| What is produced in G-s? | cAMP |
| What pathway uses cAMP as second messenger? | G-s |
| What second messenger/s does G-q produce? | IP3, Diacylglycerol |
| What is necessary to activate Protein Kinase C? | Calcium, Phosphatidalserine, Diacylgycerol. |
| What is necessary to activate Na+ channels? | Cyclic GMP phosphodiesterase |
| What is necessary to activate Protein kinase A? | cAMP |
| End result of G-q pathway? | CaM-kinases, Protein kinase C |
| End result of G-t pathway? | Na+ channels |
| End result of G-olf pathway? | cAMP gated channels |
| End result of G-s pathway? | Protein Kinase A |
| What does IP3 activate? | Ca2+ and Calmodulin |
| What does Diacylglycerol activate? | Protein kinase C |
| What pathway/s involve the CREB protein? | G-s and G-olf (they also involve cAMP) |
| Signal recognized in the trans-golgi? | Mannose-6-PO4 |
| Segment of 25-30 amino acids (hydrophobic at amino terminal end: | signal to get into ER (located on NH2 end) |
| N X S/T | signal for n-glycosylation in the ER |
| KDEL | Sequence that keeps a protein in the ER- it is located on the COOH end. |
| In onder to get into the cis-golgi, a protein needs a ______ | signal patch |
| Once a protein gets into the cis-golgi, what is added? | GLcNAc |
| In the trans golgi- | The phosphoylated mannose is exposed (mannose-6-PO4) |
| mannose-6-PO4 is a signal that is added in the ______ and allows a protein to go to the _______ | Trans-golgi, Lysosome |
| If you are missing GlcNAc, you cannot make ________ | mannose-6-PO4 signal |
| In the ER, Carbohydrates are added to what amino acid? | Asperigine |
| 2 alterations that happen in the ER: | Remove signal, add carbohydrates |
| If a protein has a KDEL signal, it is destined ______ | to stay int he ER |
| If the protein does not have KDEL, and has a signal patch, the protein can move from the ____ to the ______ | ER to the cis-golgi |
| An important enzyme in the cis golgi is the _______ | GlcNAc phpsphotransferase |
| In order to get into the lysosomes the trans-golgi needs to add ______ | mannose-6-PO4 signal. |
| Signal to get into the Mitochondria: | amino-terminal amphipathic alpha-helix with positively charged residues on one face and hydrophobic residues on the other face |
| signal needs to get into the Peroxisome | -SKL at the COOH terminus of protein |
| signal needed to get into the Nucleus | 4-8 positively charged amino acids (ex: KKKRK) |
| Relax, Breathe | You will be great. |