Imagine the main chain of a protein bends back on itself, so that two amino acid residues R₁ and R₂ come close to each other. 1 In the table below are four possibilities for what R₁ and R₂ might be. In each case, decide whether a specific interaction could form between the residues. If a specific interaction could form, give the name of the interaction. R₁ specific interaction? R₂ ○ yes lysine glutamate no name of specific interaction ☐ threonine threonine ○ yes ○ no leucine glutamine ○ yes O no ○ yes cysteine cysteine O no
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- Imagine the main chain of a protein bends back on itself, so that two amino acid residues R₁ and R₂ come close to each other. In the table below are four possibilities for what R₁ and R2 might be. In each case, decide whether a specific interaction could form between the residues. If a specific interaction could form, give the name of the interaction. R₁ R₂ specific interaction? name of specific interaction x yes alanine valine O no isoleucine asparagine ○ yes O no yes lysine glutamate ☐ O no yes threonine asparagine O noImagine the main chain of a protein bends back on itself, so that two amino acid residues R, and R₂ come close to each other. In the table below are four possibilities for what R, and R₂ might be. In each case, decide whether a specific interaction could form between th residues. If a specific interaction could form, give the name of the interaction. R₁ R₂ specific interaction? name of specific interaction X 5 O yes valine phenylalanine hydrogen bonding O no O yes threonine tyrosine hydrogen bonding O no O yes lysine glutamate O no phenylalanine serine O yes О по O Explanation Check 3 W E R % 5 7 8 LLC. All Rights Reserved Terms of Use Privacy Comer G H K Z X V B N M alt H option cmd P H alt cmd opIdentifying specific interactions between residues in a protein Imagine the main chain of a protein bends back on itself, so that two amino acid residues R₁ and R2 come close to each other. In the table below are four possibilities for what R, and R₂ might be. In each case, decide whether a specific interaction could form between the residues. If a specific interaction could form, give the name of the interaction. A Z R₁ R₂ specific interaction? name of specific interaction O yes cysteine cysteine 0 О по O yes Isoleucine O asparagine O no O yes lysine glutamate 0 O no O yes alanine isoleucine O O no Explanation Check 3 W E R alt option cmd H 5 6 8 H 5 ILLC. All Rights Reserved. Terms of Use Privacy Center Accessib V B N M дв cmd P alt option
- Imagine the main chain of a protein bends back on itself, so that two amino acid residues R, and R₂ come close to each other. In the table below are four possibilities for what R, and R₂ might be. In each case, decide whether a specific interaction could form between residues. If a specific interaction could form, give the name of the interaction. R₁ R₁₂ specific interaction? name of specific interaction X 5 O yes O valine phenylalanine 0 О по O yes threonine tyrosine 0 O no O yes lysine glutamate 0 O no O yes phenylalanine serine Π O no Explanation Check Vicoran Hill LLC. All Rights Reserved. Terms of Use Privacy CenterQ1. Eticlopride is a dopamine antagonist, which can block dopamine receptor sites and influence levels of dopamine. The molecule is involved in a number of intermolecular interactions with amino acids in the G protein-coupled receptor. о но ČI Eticlopride i) Draw a suitable diagram to indicate where the following amino acids might interact with the molecule: phenylalanine; valine; histidine; tyrosine. In your answer, please draw the amino acids and show the interaction. ii) For each interaction you have shown, state the nature of that interaction (e.g. H- bonding, pi-pi etc.)Examine the R groups of two amino acids illustrated below and specify the type of interaction that will occur between them in a protein tertiary or quaternary structure. OC-CH₂ (CH,),-NH-C-NH, H-C-NH, +NH₂ Asp O Hydrophobic interaction O Hydrogen bond O Disulfide bridge Salt bridge Arg
- Examine the R groups of two amino acids illustrated below and specify the type of interaction that will occur between them in a protein tertiary or quaternary structure. -(CH,)-NH-C-NH, +NH₂ Arg Salt bridge C-CH₂ Asp O Hydrogen bond O Hydrophobic interaction O Disulfide bridgeThe amino acid sequence shown below is a short excerpt (residues 130-172) from the rod domain of an a-keratin-like protein. Predict the effect of each of the amino acid substitutions (stabilize, destabilize, no effect) and explain your reasoning. 130 - ATEFKTRFDDAALRANDIQL VIRSNEITADLIKDRLDQITTYY - 172 a) Substitution of S in place of A at position 140. b) Substitution of V in place of I at position 147.Complete the table for the ionizable groups of the fictitious amino acid hypothetinine. Group alpha-amino alpha-carboxyl Ka 5.24 x 10-⁹ 2.13 x 10-3 pKa (to TWO decimals) 8.9 2.7 Average charge of group when pH=pK (to ONE decimal) -0.5 +0.5
- H₂N Combination of two or more protein units 7. Which type of cross-link involves interactions between two cysteine amino acids? 8. Which type of cross-link would form between the following amino acids? Η Ο || H₂N-C-C-OH T CH₂ C=O NH₂ Η Ο LL H₂N-C-C-OH T CH₂ OH 9. To what main enzyme class do the nzym that catalyze the following reaction belong? (oxidoreductases, transferases, hydrolases, lyases, isomerases, ligases) HO | || I c-c-N-C-COO + H₂O IT HR₂ R₁ H 1 This bond is cleaved H H₂N-C-COOⓇ I R₂ Wilter navy q H I H₂N-C-C00 1 R₁ •Qisulfide 10. Briefly explain the Lock and Key enzyme model.Question 2. While internal cysteine amino acid sidechains in proteins undergo oxidation to produce disulfide crosslinks that stabilize the protein structure after folding, solvent-exposed cysteine sidechains can remain in their reduced thiol form and serve as reactive nucleophiles (recall for instance Acyl Carrier Proteins involved in fatty acid biosynthesis or various oxidoreductase enzymes). The reactive thiol groups in proteins can be detected using Ellman's test, wherein the protein is reacted with a disulfide Ellman's reagent to form a new mixed disulfide and a 2-nitro-5-thiobenzoate (TNB) byproduct. Upon addition of base, TNB is deprotonated to form a dianion, which absorbs light in the visible region and can be detected using UV-Vis spectroscopy. Ellman's Reagent CO₂H -NO₂ internal disulfide crosslink O₂N- HO₂C SH solvent- exposed thiol UV Absorbance at 412 nm O₂N- -S TNB²- alkaline pH O₂N- SH HO₂C 2-nitro-5-thiobenzoate (TNB) -NO2 mixed disulfide CO₂H a) Provide a detailed…Amino acids that you would expect to line the binding pocket of a lipid-binding protein include_ Amino acid structures: SH nycoon XOOOH COOH COOH CH H₂N COOH H₂N H₂N Yaan COOH لی کر لا م سكس COOH ala, leu, phe Olys, ala, cys O ser, ala, his ser, thr, ala H₂N H₂N م H₂N OH COOH COOH HEN " H₂N COOH COOH NH₂ H₂N COOH COOH H₂N HN H₂N H₂N COOH OH COOH H₂N COOH COOH عمر کے محمد you H₂N COOH NH H₂N COOH