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Ch.18 Amino Acids and Proteins
McMurry - Fundamentals of General, Organic, and Biological Chemistry 8th Edition
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187당신이 사용하는 게 아니라요?교과서 변경
모든 교과서McMurry 8th EditionCh.18 Amino Acids and Proteins문제 112
18장, 문제 112

List the amino acids with side chains that are capable of hydrogen bonding. Draw an example of two of these amino acids hydrogen bonding to one another. For each one, draw a hydrogen bond to water in a separate sketch. Refer to Section 8.2 for help with drawing hydrogen bonds.

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Identify the amino acids with side chains that are capable of hydrogen bonding. These include amino acids with polar side chains containing functional groups such as hydroxyl (-OH), amine (-NH2), or carbonyl (C=O). Examples include serine, threonine, tyrosine, asparagine, and glutamine.
Understand the concept of hydrogen bonding. A hydrogen bond occurs when a hydrogen atom covalently bonded to an electronegative atom (like O or N) interacts with another electronegative atom. This is a key interaction in amino acids with polar side chains.
To draw two amino acids hydrogen bonding to one another, select two amino acids with polar side chains (e.g., serine and asparagine). Represent their structures, ensuring the functional groups capable of hydrogen bonding are shown. Draw a dashed line between the hydrogen donor (e.g., -OH or -NH2) and the acceptor (e.g., O or N) to indicate the hydrogen bond.
For each amino acid, draw a separate sketch showing how it can form a hydrogen bond with water. Represent the water molecule (H2O) and show the interaction between the hydrogen donor or acceptor on the amino acid and the water molecule. Use a dashed line to indicate the hydrogen bond.
Review Section 8.2 for guidance on proper hydrogen bond representation, ensuring the bond angles and distances are depicted accurately. This will help reinforce the correct visualization of hydrogen bonding interactions.

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주요 개념

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Amino Acids and Side Chains

Amino acids are organic compounds that serve as the building blocks of proteins. Each amino acid has a central carbon atom, an amino group, a carboxyl group, a hydrogen atom, and a variable side chain (R group). The properties of the side chains determine the amino acid's characteristics, including its ability to participate in hydrogen bonding, which is crucial for protein structure and function.
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가이드 코스
3:04
Intro to Amino Acids Concept 1

Hydrogen Bonding

Hydrogen bonding is a type of weak chemical bond that occurs when a hydrogen atom covalently bonded to an electronegative atom, such as oxygen or nitrogen, experiences an attraction to another electronegative atom. In the context of amino acids, side chains containing polar functional groups can form hydrogen bonds with each other and with water, influencing protein folding and stability.
추천 영상:
가이드 코스
1:22
Hydrogenation Reactions Concept 1

Hydrogen Bonding with Water

Water is a polar molecule, meaning it has a partial positive charge on one side (hydrogens) and a partial negative charge on the other (oxygen). This polarity allows water to form hydrogen bonds with other polar molecules, including certain amino acids. Understanding how amino acids interact with water through hydrogen bonds is essential for grasping their behavior in biological systems and their role in protein solubility and structure.
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가이드 코스
1:22
Hydrogenation Reactions Concept 1
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교과서 질문

Which of the following amino acids is most likely to be found on the outside of a soluble protein, and which of them is more likely to be found on the inside? Explain each answer. (Hint: Consider the effect of the amino acid side chain in each case and that the protein is folded up into its globular form.)

a. Valine

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교과서 질문

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a. What test will be used?

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교과서 질문

Which would you expect to be more soluble in water, a peptide containing mostly alanine and leucine or a peptide containing mostly lysine and aspartic acid? Explain. (Hint: Consider side-chain interactions with water.)

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