Preview

Denaturing of proteins

Better Essays
Open Document
Open Document
955 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Denaturing of proteins
Denaturing of Proteins Research Paper

Abstract:

Introduction

The experiments the objective is to determine, the possible measures of the denaturation process of several proteins by using a home based temperate The necessary applications of this experiment are to compile all the possible measures of the denaturation process in understandable units and explainable means. Other methods possible for research are by using a method that was used in this experiment is scientifically logical due to the fact that it can be done easily and at a low cost while producing sound and replicable data. All in all the experiment is able to produce data that is obtained simplistically while being applicable to the scientific community. The process of denaturation is very simple when carried out skillfully and carefully. When a solution of a protein is boiled, the protein frequently becomes insoluble—i.e., it is denatured—and remains insoluble even when the solution is cooled. The denatured protein has the same primary structure as the original, or native, protein. The weak forces between charged groups and the weaker forces of mutual attraction of nonpolar groups are disrupted at elevated temperatures, however; as a result, the tertiary structure of the protein is lost. In some instances the original structure of the protein can be regenerated; the process is called renaturation. (Haurowitz Felix, 2013)
Changing the conformation of a protein either temporarily or permanently by disrupting these forces is called denaturation. Denaturation results in a loss of activity. Since the native conformation is usually the most water soluble, disrupting the secondary and tertiary structures causes changes in solubility and frequently results in precipitation of the protein from solution. Reagents or conditions that can cause denaturation are called denaturing agents; these include heat, pH



References: 1. Millett IS, Doniach S, Plaxco KW. Toward a taxonomy of the denatured state: small angle scattering studies of unfolded proteins. Protein Fold. Cell. 2002;62:241–262. [PubMed] 2. Uversky VN. Natively unfolded proteins: a point where biology waits for physics. Protein Sci.2002;11:739–756. [PMC free article] [PubMed] 3. Fleming PJ, Rose GD. Conformational properties of denatured proteins. In: Buchner J, Kiefhaber T, editors. Protein Folding Handbook. Part 1. Vol. 2. 2005. pp. 710–736.

You May Also Find These Documents Helpful

  • Good Essays

    Hydrophobic interactions are formed to protect the hydrophobic R groups from water, this has a big impact on the folding of the protein as it will fold to protect the hydrophobic…

    • 803 Words
    • 4 Pages
    Good Essays
  • Good Essays

    The graph was about turbidity reading at different temperatures at 340nm. The curve of egg white in the graph increased dramatically at first. At 80℃, the curve got a peak at 0.251. The peak was where the protein was fully denatured. Then, the curve dropped quickly. With the raising of the temperature, protein in the solution got denatured. When the temperature increased from 60℃ to 80℃, the structure of protein got unfold. When the solution was heated, the H-bond was broken. The hydrophobic parts of protein were inside the protein surrounded by hydrophilic parts before unfolding. With the temperature increasing, the hydrophobic parts were exposed. The hydrophobic parts of proteins interacted. The reason why the turbidity reading got bigger is that protein unfold and the unfold proteins got coagulation. The coagulation caused the turbidity of solution increasing. The melting temperature of the native egg white sample was at the half of denaturation. It is about 71℃. The curve dropped because coagulation floated to the surface of solution. The curve of succinylated egg white did not change much. The –NH3+ of protein in egg white was replaced by COO- at pH8, so the protein was negative charged. The fastest coagulation of protein is at pI (isoelectric point). Because the pH of solution was at pI, the whole process is slow.…

    • 468 Words
    • 2 Pages
    Good Essays
  • Powerful Essays

    It is important to denature the enzyme because leaving it active would increase the activity of the enzyme.…

    • 1209 Words
    • 5 Pages
    Powerful Essays
  • Better Essays

    FON 241 Quiz 3

    • 1145 Words
    • 5 Pages

    The application of heat or acid to a protein that causes its shape to change is known as…

    • 1145 Words
    • 5 Pages
    Better Essays
  • Better Essays

    - Chaperons help maintain the protein in an open conformation, therefore preventing aggregation and misfolding. Chaperonins provide and “isolated” environment for proteings to fold in the absence of other interfering factors.…

    • 4432 Words
    • 18 Pages
    Better Essays
  • Powerful Essays

    o denaturation: the partial or total alteration of the structure of a protein without change in covalent structure by the action of certain physical procedures (heating, agitation) or chemical agents. Any disruption of the protein structure that is accompanied by a loss of activity…

    • 2076 Words
    • 9 Pages
    Powerful Essays
  • Satisfactory Essays

    If the temperature of the enzyme is heated or cooled, then the time for the reaction to take place will increase or decrease. I think this will happen because if the enzyme is exposed to cold temperatures, its reaction (in this case denaturisation) will occur at a slower rate as the molecules move very slowly under these conditions. If the enzyme is heated, then the denaturisation may occur at a faster rate as the molecules move more quickly in the enzyme. Therefore, the results of this lab will be dependent on the temperature that the enzyme is exposed to in determining how long it takes for the enzyme to…

    • 110 Words
    • 1 Page
    Satisfactory Essays
  • Good Essays

    Jim, C. (2007, August). The Structure of Proteins. Retrieved October 02, 2012, from Chemguide: http://www.chemguide.co.uk/organicprops/aminoacids/proteinstruct.html…

    • 659 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Exhibit

    • 7625 Words
    • 31 Pages

    References: 1. Andreeva A, Howorth D, Chandonia JM, Brenner SE, Hubbard TJP, et al. (2008) Data growth and its impact on the scop database: new developments. Nucleic Acids Res 36: D419–D425. 2. Qiu L, Pabit SA, Roitberg AE, Hagen SJ (2002) Smaller and faster: the 20residue trp-cage protein folds in 4 micros. J Am Chem Soc 124: 12952–12953. 3. Goldberg ME, Semisotnov GV, Friguet B, Kuwajima K, Ptitsyn OB, et al. (1990) An early immunoreactive folding intermediate of the tryptophan synthase 2 subunit is a molten globule. FEBS Letters 263: 51–56. 4. Matagne A, Chung EW, Ball LJ, Radford SE, Robinson CV, et al. (1998) The origin of the alphadomain intermediate in the folding of hen lysozyme. J Mol Biol 277: 997–1005. 5. Onuchic JN, Wolynes PG (2004) Theory of protein folding. Curr Opin Struct Biol 14: 70–75. 6. Levinthal C (1969) How to fold graciously. In: Debrunnder JTP, Munck E, editors. Mossbauer Spectroscopy in Biological Systems: Proceedings of a meeting held at Allerton House, Monticello, Illinois. University of Illinois Press. pp. 22–24. 7. Nlting B, Schlike W, Hampel P, Grundig F, Gantert S, et al. (2003) Structural determinants of the rate of protein folding. J Theor Biol 223: 299–307. 8. Thirumalai D, Klimov DK (1999) Emergence of stable and fast folding protein structures. Technical Report cond-mat/9910248. 9. Govindarajan S, Recabarren R, Goldstein RA (1999) Estimating the total number of protein folds. Proteins 35: 408–414. 10. Cossio P, Trovato A, Pietrucci F, Seno F, Maritan A, et al. (2010) Exploring the universe of protein structures beyond the protein data bank.…

    • 7625 Words
    • 31 Pages
    Good Essays
  • Good Essays

    Morgan, G., & Radford, S. (2012). How Proteins Fold and Misfold. In Protein Folding and Misfolding:…

    • 601 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Bacteriophage

    • 268 Words
    • 2 Pages

    type 1 to type 7. The T­even phages, T2, T4, and T6, were used as model systems for the…

    • 268 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    HypothesisIt was predicted that the physical characteristics of the egg white solution at room temperature would appear clear and normal like a raw egg white. This is because nothing would be done to the egg white. It was also predicted that when the egg white solution gets heated, the protein would denature if the temperature exceeds 65 °C. The protein would solidify, turn opaque, and turn white in colour. This would happen because the heat at a certain temperature will cause the amino acids in the protein to unravel, thus the protein would lose its structure, and this would reveal a colour change. It was also predicted that when acid is poured into the egg white solution, the proteins would denature and turn into a white colour. This would be because it would result in a further straightening effect on the protein chain. It was also predicted that when silver nitrate is poured into the egg white solution, it would result in some sort of precipitate since silver is always precipitating out. Also, since salts are ionic compounds, they disrupt salt bridges in proteins, and so this can also be a factor.…

    • 1006 Words
    • 4 Pages
    Good Essays
  • Good Essays

    As protein denaturation can be cause by several factors such as temperature, pH, salt concentration. In this experiment, we are examining how these factors affect the denaturation of protein. We use egg white, which is actually a solution of protein in water in this experiment.…

    • 1473 Words
    • 6 Pages
    Good Essays
  • Better Essays

    6. Christian B. Anfinsen, John Tileston Edsall, Frederic Middlebrook Richards Advances in Protein Chemistry. Science 1976, 6-7.…

    • 1103 Words
    • 5 Pages
    Better Essays
  • Better Essays

    Protein Texturization

    • 8457 Words
    • 34 Pages

    Proteins are responsible for the distinct physical structure of a number of foods such as fibrous structure of muscle tissue like fish and meat, the porous structure of bread and the gel structure of some dairy and soy products. Although many plant proteins have a globular structure are available in large amounts, however, they are used only a limited extent in food processing. To transform a fibre-like structure of protein to globular proteins, protein texturization is used to process a protein product with cooking strength and a meat-like structure. This type of product is marketed as spun protein isolates, formed meat analogs, extrusion cooked meat extenders and meat analogs. ( H.D.Belitz,W.Grosch,P.Schieberle, 2009)…

    • 8457 Words
    • 34 Pages
    Better Essays