alexa Organic-Bio-Chemistry (From Soap to Amyloid Proteins) | OMICS International
ISSN: 2157-7064
Journal of Chromatography & Separation Techniques

Like us on:

Make the best use of Scientific Research and information from our 700+ peer reviewed, Open Access Journals that operates with the help of 50,000+ Editorial Board Members and esteemed reviewers and 1000+ Scientific associations in Medical, Clinical, Pharmaceutical, Engineering, Technology and Management Fields.
Meet Inspiring Speakers and Experts at our 3000+ Global Conferenceseries Events with over 600+ Conferences, 1200+ Symposiums and 1200+ Workshops on
Medical, Pharma, Engineering, Science, Technology and Business

Organic-Bio-Chemistry (From Soap to Amyloid Proteins)

Aly Moussa*

National Agency for Sanitary Environmental Laboratoire de Lyon, France

*Corresponding Author:
Aly Moussa
National Agency for Sanitary Environmental Laboratoire de Lyon, France
Tel: 336-174-609-52
E-mail: [email protected]

Received date: September 15, 2014; Accepted date: September 15, 2014; Published date: September 25, 2014

Citation: Moussa A (2014) Organic-Bio-Chemistry (From Soap to Amyloid Proteins). J Chromatograph Separat Techniq 5:e125. doi:10.4172/2157-7064.1000e125

Copyright: © 2014 Moussa A . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Visit for more related articles at Journal of Chromatography & Separation Techniques

This branch of science is concerned with the study of structures, chemical composition, properties and chemical reactivity of organic compounds and materials. Organic compounds and organic chemicals in biology form the bases of life on our planet and are mainly hydrocarbons but can contain also other elements as oxygen, nitrogen, sulfur, phosphorus, organometallic compounds as sodium, potassium… etc., alkaline earth metals as magnesium, transition metals as Zinc, Copper, Cobalt…etc. or other metals as aluminum.The vital force theory developed before the 19th century differentiated organic compounds obtained from living organisms from the inorganic compounds. Since organic compounds existed often as mixtures, then varieties of techniques were developed for separation, characterization and purity assessment through the following: distillation, crystallization, solvent extraction, mass spectrometry-NMR, centrifugation, electrophoresis and chromatography i.e. HPLC and gas chromatography.

The first organic compound recorded was SOAP in 1816 by Michel CHEVREUL by adding alkali to fats, followed in 1828 by FriedrichWOHLER who produced UREA using the inorganic ammonium cyanate salt and in 1856 W.H. PERKIN manufactured accidentally an organic dye called PERKIN’S MAUVE instead of quinine. By the second half of the 19th century were developed synthetic indigo replacing those produced earlier from plants and at the same time pharmaceutical industry began manufacturing acetylsalicylic acid (aspirin). Early 20th century Polymers, Enzymes were shown to be large organic molecules and Petroleum was shown to be of biological origin and later on Petro-chemistry introduced various synthetic chemicals. The study of proteins and nucleic acids became more and more accelerated through Biochemistry leading to a better understanding of diseasese specially those caused by misfolded protein aggregates i.e. amyloid proteins.

Protein misfolding diseases (Amyloidosis)

Amyloid proteins are insoluble, aggregated and inappropriately folded versions of proteins or polypeptides present naturally in the body and their deposition within cells render the protein dysfunctional. The change from normal forms to amyloid one is associated with conformational changes in the peptide back-bond from a higher degree alpha-helical structure to a conformer in which a much higher degree of beta-sheet structure are present. More than 20 serious human diseases are reported as Alzheimer's disease (Aβ), Parkinson's disease (Alphasynuclein), Diabetes mellitus type 2 (Amylin), Medullary carcinoma of the thyroid (ACal), Cardiac arrhythmias (AANF), Rheumatoid arthritis (AA), Lattice corneal dystrophy (AKer), Cerebral amyloid angiopathy (ACys), Dialysis related amyloidosis (Beta 2 microglobulin)…etc. The severity and prediction of the disease depends on the fate of the misfolded protein which may become non-functional, sub optimally functional or it may be degraded after tagging with heat shock proteins by the cellular machinery.

Amyloids are characterized by a cross-beta sheet quaternary structure and usually were identified by using indirect measurements with fluorescent dyes, stain polarimetry, circular dichroism, or FTIR. Better identification of the cross-beta fibres (observation of one longitudinal and one transverse diffraction lines) is by placing the sample in an X-ray diffraction beam.

Some of these misfolded amyloids are infectious proteins named Prion (PrPsc) are the causative agent of the neurodegenerative diseases in animals and man [1]. Upon infection with prions conformational changes in the normal cellular glycoprotein (PrPc) leading to propagation of a beta-sheet conformed, detergent insoluble and proteinase K (PK) resistant pathogenic protein. The accumulation of thePPscis associated with a wide range of Transmissible Spongiform Encephalopathy’s (TSE), including scrapie in sheep and goats, spongiform encephalopathy in cattle (BSE), chronic wasting disease in deer and Creutzfeldt-Jakob disease in humans (CJD).

Streptomycin and Proteins

Streptomycin was shown in the year 1940 to interact with globulin and albumin during dialysis studies. By accident we also observed the interaction of streptomycin with the prion proteins and later with the Alzheimer peptide P53 and demonstrated the ability of streptomycin to form multimolecular aggregates with the pathogenic prion protein and their recovery via a low-speed centrifugation step. The addition of increasing quantities of streptomycin to constant amount of brain extracted and PK treated (PrPres), followed by electrophoresis on 15% polyacrylamide gel, transfer and immunodetection revealed an increase in the molecular mass of each of the 3 PrPsc bands proportional to the quantity of streptomycin added. The interaction of streptomycin with proteins is optimum at alkaline PH and take place through hydrogen bond transfer between the two guanidine groups present on streptomycin and the amino-acids of one or several prion proteins. Many chemical molecules sharing common chemical function with streptomycin (harboring 2 guanidine groups) as dihydrostreptomycin, bis-3-aminoproylamine, guanidine hydrochloride and spermine tetrahydrochloride reproduced aggregation and precipitation of the PrPsc ruled out the possibility of a shiff-base reaction [2].

Immunochemical detection techniques as western-blot, Elisa... etc. using streptomycin were developed for better prion detection in disease samples [2]. The interaction of streptomycin with proteins leads to an amplification of their immunological detection either due to the presence of protein aggregates but as well to the presence of hydrogen bonds on the protein surface allowing better attachment of the monoclonal antibodies to their epitopes. The introduction of streptomycin sulfate also in immune-histochemical detection resulted in earlier diagnosis and accurate cellular and regional mapping of the PrPsc deposition in several animal TSEs [3].

The issue of the interaction of streptomycin with PrPsc after inoculation of mixtures intraperitonially into mice revealed reduced to even absence of accumulated prion infectivity marker in the spleen 45 days post inoculation. This drop in infectivity can be attributed to changes of the surface electric charges due to hydrogen bond transfer between the two guanidine groups present on streptomycin and the different amino acids on the PrPsc peptides [4]. Also it was reported that guanidine hydrochloride possess antibacterial activity and can inactivate the pathogenic prion protein providing evidence that the 2 guanidine groups are essential for the biological activity of streptomycin and related chemicals and also for their antibacterial activity.

Future researches should be directed towards incorporation of streptomycin in protein detection techniques especially in cancer diagnosis. Also streptomycin can be used for inactivation of enzymes or infectivity reduction of different proteins or even viruses. Finally protein aggregation activity of streptomycin can be of benefit in soil biology.


Select your language of interest to view the total content in your interested language
Post your comment

Share This Article

Recommended Conferences

Article Usage

  • Total views: 11732
  • [From(publication date):
    September-2014 - Jun 24, 2018]
  • Breakdown by view type
  • HTML page views : 7960
  • PDF downloads : 3772

Post your comment

captcha   Reload  Can't read the image? click here to refresh

Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2018-19
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri & Aquaculture Journals

Dr. Krish

[email protected]

+1-702-714-7001Extn: 9040

Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals


[email protected]

1-702-714-7001Extn: 9042

Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001Extn: 9040

Clinical Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

Food & Nutrition Journals

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

General Science

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics & Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]

1-702-714-7001Extn: 9014

Materials Science Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Nursing & Health Care Journals

Stephanie Skinner

[email protected]

1-702-714-7001Extn: 9039

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

Ann Jose

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

[email protected]

1-702-714-7001Extn: 9042

© 2008- 2018 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
Leave Your Message 24x7