StudyXY
RegisterLog in

Protein Structure

Explore the levels of protein structure and understand how functional groups like amine and carboxyl groups influence protein folding, function, and interactions.

Daniel Miller
Contributor
4.3
39
4 months ago
Preview (4 of 11 Pages)
100%
Purchase to unlock

Page 1

Protein Structure - Page 1 preview image

Loading page image...

Protein StructureWhat are the levels of protein structure and what role do functional groups play?Proteins accomplish many cellular tasks such as facilitating chemical reactions, providing structure, andearning information from one cell tc another. How a protein chain coils up and folds determines itsthree-dimensional shape. Its shape will, in turn, determine how it interacts with other molecules and thusperforms its function in the cell.Model 1- Formation of a Peptide Bonda. Circle an amine group in the diagram, {click the picture and select edit to doso for this and ALL other drawing questions)b. Draw a triangle around a carboxylic acid (carboxy!} group.2. How are the amino acids similar to one another?eaCV t o(U-enWCRY H Y 'R M W e dA M wW vOCJ-tVX(MW,CRVkrSY IcjVo\K?

Page 2

Protein Structure - Page 2 preview image

Loading page image...

3. How are the amino acids different from one another?ivn- t AYIJWC4. How many amino acids are involved in the reaction to make a dipeptide?5. In Model 1 the original amino acids are combined through a condensation reaction tomake the dipeptide.a. What does Ri represent in the dipeptide?b. What does R 2represent in the dipeptide?MWijt I -6. Put a box around the atoms in the amino acids that become the H:O molecule producedby the reaction in Model 1.7. A peptide bond is a covalent bond linking two amino acids together in a peptide.a.Circle the peptide bond in Model 1.b.Between which two atoms in the dipeptide is the peptide bond located?c.Between what two functional groups is the peptide bond located?8. There are 22 different amino acids found in nature. Two were shown in Model 1.Additional examples are shown below. With your group, write one or two grammaticallycorrect sentences to describe how these amino acids are similar and how they are differentUse the terms R-group, amine group, and carboxyl group in your description.HIH j N— G— COUHHGlycine(Gly)Cysteine(Cn)Asparagine(A*n)Phenylalanine(Phe)

Page 3

Protein Structure - Page 3 preview image

Loading page image...

Model 2 - Protein Structure (Part A)Primary StructureAmino acid sequence: Ser-Tyr-Ala-Phe - Vai-Cys-Tyr-Asp-Cys - GlyPeptide structure:Secondary Structure<>il

Page 4

Protein Structure - Page 4 preview image

Loading page image...

9. Locate the primary structure of the polypeptide in Model 2.a.Draw an arrow to two different peptide bonds in the diagram.b.Circle three separate amino acids that were joined together to make thepolypeptide.10. The first five amino acids in this polypeptide are serine, tyrosine, alanine,phenylalanine, and valine, in that order (Ser-Tyr-Ala-Phe-Val). If the amino acids werechanged or rearranged (i.e., to Val-Phe-Ala-Ser-Tyr), the polypeptide would have adifferent name and identity. With your group, use this information to write a definition ofthe primary structure of a protein.CXtkeXAM A M11. Locate the secondary protein structure in Model 2.a.What types of bonds are holding the secondary structure in place?b.What groups on the amino acids are always involved in these bonds?MVx)( A M A< A A M 1A-4-12. Draw a rectangle around two different R groups on the amino acids in the secondarystructure in Model 2.13. Is there any interaction between R groups in the secondary structure in Model 2?(Jo14. Secondary protein structure can take the form of an alpha(a)-helix or a beta{b)-pleatedsheet, as illustrated below.a.Which drawing represents an a-helix, Molecule 1 or Molecule 2? Explain your reasoning.WuteMAjX-e,■H - IroftdsbWhich drawing represents a b-pleated sheet? Explain your reasoning.Mokculc 1Molecule2
Preview Mode

This document has 11 pages. Sign in to access the full document!

Study Now!

XY-Copilot AI
Unlimited Access
Secure Payment
Instant Access
24/7 Support
Document Chat

Document Details

Subject
Biology

Related Documents

View all
Solved Assignments

Amoeba Sisters Video Recap of Meiosis

Review the steps and significance of meiosis with this Amoeba Sisters video recap—learn about chromosome numbers, crossing over, and errors like nondisjunction, all while exploring how genetic variation is created in gametes.

Solved Assignments

Calculating GPP and NPP

This lab explores how light affects photosynthesis by measuring dissolved oxygen in water with Elodea plants under light and dark conditions—demonstrating biochemical reactions and experimental design principles.

Class Notes

Endocrine System

A comprehensive overview of the endocrine system, covering key glands, hormone functions, and homeostatic mechanisms—ideal for anatomy and physiology students at any stage of their coursework

Past Exams

AS Biology Paper 1 2024

Worksheet on the human gas exchange system with labeled diagrams and questions on lung structure and alveolar gas exchange. Includes identification tasks and matching activities. Ideal for GCSE biology practice

Class Notes

Kami Export - Sandra Nichols - Bio-Worksheet-Mutat

This worksheet explains DNA mutations: deletions and insertions cause frameshifts; substitutions can be silent, missense, or nonsense. It shows how mutations change amino acids and includes sickle cell anemia as an example of a missense mutation.

Solved Assignments

Cami Salazar Correa Cell Energy Cycle Gizmo

Explore how photosynthesis and cellular respiration cycle energy through plant and animal cells. Use the simulation to visualize how glucose and ATP are created, stored, and used by cells.

Solved Assignments

11 Transport in Cells S

This worksheet explores how water moves in and out of cells through osmosis. Using a model with sugar and water molecules, it examines selectively permeable membranes and helps students analyze molecule movement, ratios inside outside the cell.

Solved Assignments

Dihybrid Cross Amoeba Sisters Video Recap

Amoeba Sisters Video Recap worksheet on Dihybrid Crosses using Mendelian genetics. Focuses on pea plant traits (color and texture), Punnett square practice, genotype/phenotype identification, and understanding inheritance probabilities.

Solved Assignments

11 Transport in Cells-S (KEY)

This text explores how water moves in and out of cells through osmosis, highlighting the importance of water balance in the body. Disrupted water levels can harm cells and organs, potentially causing swelling, brain damage, or even death.

Solved Assignments

How Changes in Population Lead to the Formation of

Natural selection worksheet illustrating directional, disruptive, and stabilizing selection through body‐size vs. population graphs. Includes questions on comparing variables and identifying selection types from the models.