Structures of Proteins - Beta sheets and Bends

0.0(0)
studied byStudied by 0 people
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/6

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

7 Terms

1
New cards

Beta Sheets

Multiple strands lin next to eachother closely.

  • Hydrogen from amine can bond to next oxygen of carboxyl creating a bond

2
New cards

Functions of beta sheets

  1. Extensive/ can continue

  2. Orientation of CO and NH are parallel in the plane of the sheet where side chain is alternating above and below

  3. Formed by aa strands that are localized. Won’t bond between distant aa but close ones (same with alpha helicase)

3
New cards

Two orientations of beta sheets

  1. Parallel

  2. Antiparallel

4
New cards

Parallel beta sheets

  • N terminus to C terminus

  • Need 5 to 8 strands to be stable and thus be functional

5
New cards

Antiparallel Beta sheets

  • Need 3 but sometimes 2 strands to be stable

  • AA are not directly corresponding

  • 1 chain may have more than another

    • produces bulges or bends to keep close distances.

6
New cards

Bends

  • Linking component

    • Connect alpha helix to other structures

  • Need 180-degree bend

    • Need 4 amino acids to complete the turn

7
New cards

How are bends stable?

  • Stable because the bond between carboxyl O and amine H

  • Typically, glycine at position 3

  • Prolene in position 2

    • Small and flexible