The protein ribbon structure below, a single polypeptide, shows secondary structures in different shades of gray. This protein appears to have 4 domains, all mainly B structures. no distinct domains. 2 domains each containing both a and B structures. 2 domains, both mainly B structures. 0:4 domains 2 all a and 2 all B
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- Which of the following is not correct regarding protein domains or modules such as the immunoglobulin domain, growth factor domain, and fibronectin domain? each type of domain is found in a variety of proteins O they always have the same function in differend proteins O domains are hypically 40 to 100 amine acids in length O they can be present in multiple copies in the same protein domains of a certain type usuaily have the same tertiary structureGive the force of interaction involved in the protein folding of the protein structure A and C: COO CH,C-N-H• • •0- Pleated sheet structure A H C Helical structure CH3 CH3 - CH3 -CHCH,CH, CH- CH, CH3 (CH,),NH, -0-CCH,- C=0..•HN CH, CH, CH,CH CH,CH CH, CH, CH OH 0=C -CH,-S,S-CH,- H,Ñ Structure A: H-bonding: Structure C: Van der Waals O Structure A: Covalent interaction; Structure C: dipole-dipole interaction O Structure A: Salt bridge: Structure C: H-bonding Structure A: Hydrophobic interaction; Structure C: ionic interaction 00000 BWhich amino acid sequence will form part of which protein structure, and why? Sequence 1: Ser-Phe-Gln-Val-Lys-Leu-His-Tyr-Asp-Val Sequence 2: Glu-Tyr-Leu-Asn-Phe-Ala-Gln-Val-Leu-Arg __Amphipathic beta strand __ Amphipathic alpha helix
- Which of the following is the TRUE statement? When found together, a helices and B sheets are generally found in the same structural 'layer The B conformation is most stable when the individual segments are twisted in a left-handed direction Hydrophobic interactions make a large contribution to the stability of protein structures, therefor, burial of hydrophobic amino acid residues need at least two layers of secondary structure The backbone segment of a ß conformation polypeptide segment can readily H-bond to an a helix adjacent to itWhich statement best describes the protein structure shown below? This is an alpha helix. This is a tertiary structure that consists almost entirely of beta strands. This is a tertiary structure consisting of a roughly equal mixture of alpha helices and beta sheets. This is a beta sheet. This is a tertiary structure that consists almost entirely of alpha helices.amino acids are joined together by bónds, which are a particular bond. type of SECONDARY STRUCTURE B sheet a helix amino acid side chain amino acid side chain Bond X hydrogen carbon. oxygen nitrogen Bond X carbon carbon- hydrogen peptide bond „nitrogen -nitrogen oxygen carbon B Figure 4-10 Essential Cell Biology 3/e (© Garland Science 2010) Figure 4. Two types of secondary structure proteins: a-helix and B-sheet (constructed from multiple B-strands). A & B: a-helix structure represented in (A) ball-and-stick and (B) ribbon forms. C & D: B-sheet structure represented similarly. Copyright 2013 from Essential Cell Biology, 4th Edition by Alberts et al. Reproduced by permission Garland Science/Taylor & Francis LLC. Answer the below questions on secondary structure in your own document. 3. The hatched lines connecting atoms in Figure 4 represent the bonds that hold together these secondary structures (for example, the bond labeled "Bond X"). What types of bonds are these? (If you're having…
- Part A What is the highest structural level of protein structure represented in the following image? primary quaternary secondary pentanary tertiary O OMany proteins contain one or more motifs built from particular combinations of secondary structure. Describe the three common structural motifs and describe some of the general functions of protein domains on the extracellular membrane surface, within the membrane, or on the cytosolic face of the membrane. Whatr are the biological activities of proteins are affected by chemical modifications.18 The image below shows the different interactions responsible for the spontaneous folding of a protein molecule. Identify which interactions are involved for each labelled region 0-H H CH,OH CH, NH, 0 B O-H--OO CH, CH₂ A B D C A यह मह CH CH₂COOH C H CH, CH, CH, CH H--O=C D T (CHJANH, - interactions ion-dipole interaction Hydrogen bonding Hydrophobic interactions Disulfide bonds lon-ion interaction 18
- What general structural feature is shared by proteins that specifically form homodimers (but not homotrimers, homoteramers etc)? Only one answer is correct. the surface consists of hydrophilic alpha-helix. the surface is highly modified by post-translational modification. the surface is permanently bound by chaperones. the surface is unstructured. the surface, or part of it, is self-complementary.Among the secondary structures, which is most likely to form globular structures resulting from interactions between polypeptide chains? a-helices beta-pleated sheets Collagen helices turns or random structures cannot be determinedChanging one amino acid within a protein sequence from a tryptophan to a stop codon would be best classified as Amino acids groups Group Characteristics Names Ala, Val, Leu, Ile, Pro, Phe Trp, Met Ala: A Leu: L non-polar hydrophobic Arg: R Asn: N Lys: K Met: M Asp: D Cys: C Gly: G polar hydrophilic (non-charged) Gly , Ser, Thr, Cys, Tyr, Asn Gln Phe: F Pro: P Ser: S acidic negatively charged Asp, Glu Glu: E Gln: Q Thr: T His: H lle: I Trp: W Туr: Y Val: V basic positively charged Lys, Arg, His A) Conservative missense O B) Nonsense O C) Neutral O D) Non-conservative missense