Domanda del libro di testo
For each of the conjugated proteins described, identify to which class of conjugated protein it belongs.
a. Cholesterol is attached to this protein in order to move through the blood system.
32
views
Ch.18 Amino Acids and Proteins
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Non è quello che usi tu?Cambia libro di testo
Capitolo 18, Problema 23
Examine the α-helix in Figure 18.1 and determine how many backbone C and N atoms are included in the loop between an amide hydrogen atom and the carbonyl oxygen to which it is hydrogen bonded.
Guida verificata passo dopo passo1
Examine the structure of the α-helix in Figure 18.1. The α-helix is a common secondary structure in proteins, stabilized by hydrogen bonds between the backbone amide hydrogen and the carbonyl oxygen of amino acids.
Identify the hydrogen bond in the α-helix. This bond occurs between the amide hydrogen of one amino acid and the carbonyl oxygen of another amino acid located four residues earlier in the sequence.
Count the number of backbone atoms (C and N) in the loop formed by this hydrogen bond. The backbone atoms include the nitrogen (N) of the amide group, the alpha carbon (Cα), and the carbonyl carbon (C=O) of each amino acid.
Trace the loop starting from the amide hydrogen atom, moving through the backbone atoms of the intervening amino acids, and ending at the carbonyl oxygen atom involved in the hydrogen bond.
Add up the total number of backbone C and N atoms in this loop, ensuring you include all the atoms from the starting point (amide hydrogen) to the endpoint (carbonyl oxygen).
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Concetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
α-helix Structure
The α-helix is a common secondary structure in proteins, characterized by a right-handed coil where each turn of the helix contains about 3.6 amino acids. The backbone of the helix is stabilized by hydrogen bonds between the carbonyl oxygen of one amino acid and the amide hydrogen of another, typically four residues earlier in the sequence. Understanding this structure is crucial for analyzing the spatial arrangement of atoms within the helix.
Video consigliato:
Percorso guidato
3:27
DNA Double Helix Concept 1
Backbone Atoms
In protein structures, the backbone refers to the main chain of the polypeptide, consisting of repeating units of nitrogen (N), carbon (C), and carbonyl (C=O) groups. The backbone atoms are essential for determining the overall shape and stability of the protein. In the context of the α-helix, identifying the specific backbone C and N atoms involved in hydrogen bonding is key to understanding the loop structure.
Video consigliato:
Percorso guidato
05:22Atomic Theory
Hydrogen Bonding
Hydrogen bonding is a type of attractive interaction that occurs between a hydrogen atom covalently bonded to an electronegative atom (like nitrogen or oxygen) and another electronegative atom. In the α-helix, these bonds are critical for maintaining the helical structure, as they provide stability and influence the spatial arrangement of the backbone atoms. Recognizing how these bonds form between amide hydrogens and carbonyl oxygens is essential for analyzing the loop in the helix.
Video consigliato:
Percorso guidato
1:22Hydrogenation Reactions Concept 1
Pratica correlata
Domanda del libro di testo
Consult the β-sheet in Figure 18.2 and (a) name the bonding responsible for the sheet formation and (b) identify the specific atoms responsible for this bonding.
1441
views
Domanda del libro di testo
How many ways can four different amino acids be arranged in a peptide so that each peptide is unique?
821
views
Domanda del libro di testo
What atoms are present in a planar unit in a protein chain?
1585
views
Domanda del libro di testo
How many amino acid units do these atoms come from? Why are these units planar?
863
views
Domanda del libro di testo
Complete the following two sentences with either globular or fibrous:
a. Proteins with secondary structure composed primarily of alpha-helix are___________ proteins.
517
views