Jove
Visualize
Contact Us

Related Experiment Video

Updated: Jun 25, 2026

Isolation and Culture of Human Fungiform Taste Papillae Cells
08:46

Isolation and Culture of Human Fungiform Taste Papillae Cells

Published on: May 17, 2012

Properties of diphenolase from Vanilla planifolia (Andr.) shoot primordia cultured in vitro.

R Debowska1, A Podstolski

  • 1Institute of Experimental Plant Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.

Journal of Agricultural and Food Chemistry
|July 17, 2001
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Enzymatic cleavage of phloridzin in extract of apple-tree leaves.

Bulletin de l'Academie polonaise des sciences. Serie des sciences biologiques·1966
See all related articles
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Investigating vanilla shoot primordia culture, this study characterized diphenolase (PPO) enzyme activity and stability. Researchers identified key properties, including optimal pH, thermal stability, and inhibition patterns, providing insights into vanilla biochemistry.

Area of Science:

  • Biochemistry
  • Plant Science
  • Enzymology

Background:

  • Vanilla (Vanilla planifolia Andr.) shoot primordia culture is a source of valuable enzymes.
  • Diphenolase (PPO, EC1.10.3.1) plays a crucial role in plant secondary metabolism.
  • Understanding PPO properties is essential for its biotechnological applications.

Purpose of the Study:

  • To investigate the biochemical properties of diphenolase (PPO) from vanilla shoot primordia culture.
  • To determine the enzyme's optimal conditions, stability, and substrate specificity.
  • To characterize the enzyme's kinetic parameters (Km and Vmax).

Main Methods:

  • Enzyme extraction and purification from vanilla shoot primordia.
  • Determination of optimal pH for extraction and activity.

More Related Videos

HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin
11:15

HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin

Published on: July 23, 2016

Measuring Volatile and Non-volatile Antifungal Activity of Biocontrol Products
06:47

Measuring Volatile and Non-volatile Antifungal Activity of Biocontrol Products

Published on: December 5, 2020

Related Experiment Videos

Last Updated: Jun 25, 2026

Isolation and Culture of Human Fungiform Taste Papillae Cells
08:46

Isolation and Culture of Human Fungiform Taste Papillae Cells

Published on: May 17, 2012

HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin
11:15

HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin

Published on: July 23, 2016

Measuring Volatile and Non-volatile Antifungal Activity of Biocontrol Products
06:47

Measuring Volatile and Non-volatile Antifungal Activity of Biocontrol Products

Published on: December 5, 2020

  • Polyacrylamide gel electrophoresis (PAGE) for isozyme analysis.
  • Thermal stability assays.
  • Enzyme inhibition studies using various chemical agents.
  • Kinetic analysis using monophenolic and diphenolic substrates.

    • Main Results:

    • Two pH optima (6 and 8) were identified for enzyme extraction, with an activity optimum between pH 3 and 4.
    • Sodium dodecyl sulfate enhanced extraction and increased specific activity.
    • Polyacrylamide gel electrophoresis revealed three PPO isozyme bands.
    • The enzyme exhibited high thermal stability, with no activity loss after 120 min at 50°C.
    • Several compounds, including L-ascorbic acid and chelators, were potent inhibitors.
    • PPO demonstrated both monophenolase and diphenolase activities.
    • Kinetic parameters (Km and Vmax) were determined for various substrates, with highest Vmax for 4-hydroxybenzyl alcohol and greatest affinity for protocatechuic acid.

    Conclusions:

    • Vanilla shoot primordia PPO exhibits unique properties, including dual extraction pH optima and broad substrate specificity.
    • The enzyme's high thermal stability and susceptibility to specific inhibitors offer avenues for biotechnological manipulation.
    • Kinetic data provides valuable insights into the enzyme's physiological role in vanilla tissue.