Subtopic Deep Dive
Microbial Tannase Purification Characterization
Research Guide
What is Microbial Tannase Purification Characterization?
Microbial tannase purification characterization involves isolating tannase enzymes from microbes like Aspergillus and Lactobacillus using chromatography, determining molecular weights, and analyzing kinetic properties to classify types I and II.
Researchers purify tannases via techniques like gel filtration and ion-exchange chromatography from Aspergillus niger and Lactobacillus plantarum. Characterization includes SDS-PAGE for molecular weight and assays for Km and Vmax values. Over 10 key papers since 1994 document these methods, with Barthomeuf et al. (1994) cited 120 times.
Why It Matters
Purified microbial tannases enable gallic acid production for anticancer applications, as in Kar et al. (1999) using Rhizopus oryzae solid-state fermentation (107 citations). They support food industry tannin degradation, per Jiménez et al. (2014) on Lactobacillus plantarum TanBLp tannase (138 citations). Structural insights from purification aid enzyme engineering for therapeutics, as shown in Iwamoto et al. (2008) gene cloning (109 citations).
Key Research Challenges
Low Yield Purification
Achieving high purity and recovery during chromatography remains difficult due to tannase instability. Barthomeuf et al. (1994) reported multi-step purification from Aspergillus niger yielding 120 citations but low specific activity. Optimizing conditions for types I and II tannases is ongoing.
Kinetic Parameter Variability
Determining consistent Km and Vmax across strains is challenging from substrate heterogeneity. Rodríguez et al. (2007) analyzed tannic acid degradation by Lactobacillus plantarum extracts (114 citations). Strain-specific differences complicate comparisons.
Molecular Weight Accuracy
SDS-PAGE and gel filtration often yield inconsistent subunit sizes for microbial tannases. Jiménez et al. (2014) characterized TanBLp from L. plantarum at specific weights (138 citations). Glycoprotein nature interferes with precise determination.
Essential Papers
Polyphenol-Mediated Gut Microbiota Modulation: Toward Prebiotics and Further
Maria-Carolina Rodríguez-Daza, Elena C. Pulido-Mateos, Joseph Lupien‐Meilleur et al. · 2021 · Frontiers in Nutrition · 389 citations
The genome of gut microbes encodes a collection of enzymes whose metabolic functions contribute to the bioavailability and bioactivity of unabsorbed (poly)phenols. Datasets from high throughput seq...
Effects of Fermentation on Bioactivity and the Composition of Polyphenols Contained in Polyphenol-Rich Foods: A Review
Fan Yang, Chao Chen, Derang Ni et al. · 2023 · Foods · 194 citations
Polyphenols, as common components with various functional activities in plants, have become a research hotspot. However, researchers have found that the bioavailability and bioactivity of plant pol...
Recovery of phenolic antioxidants from Syrah grape pomace through the optimization of an enzymatic extraction process
María-Rocío Meini, Ignacio Cabezudo, Carlos E. Boschetti et al. · 2019 · Food Chemistry · 161 citations
Gallic Acid and Diabetes Mellitus: Its Association with Oxidative Stress
Yu Xu, Guoyi Tang, Cheng Zhang et al. · 2021 · Molecules · 143 citations
Diabetes mellitus (DM) is a severe chronic metabolic disease with increased mortality and morbidity. The pathological progression of DM is intimately connected with the formation and activation of ...
Tannin Degradation by a Novel Tannase Enzyme Present in Some Lactobacillus plantarum Strains
Natalia Jiménez, María Esteban-Torres, José M. Mancheño et al. · 2014 · Applied and Environmental Microbiology · 138 citations
ABSTRACT Lactobacillus plantarum is frequently isolated from the fermentation of plant material where tannins are abundant. L. plantarum strains possess tannase activity to degrade plant tannins. A...
An update on the potential mechanism of gallic acid as an antibacterial and anticancer agent
Saeedeh Keyvani‐Ghamsari, Maryam Rahimi, Khatereh Khorsandi · 2023 · Food Science & Nutrition · 124 citations
Abstract Drug resistance to antibacterial and anticancer drugs is one of the most important global problems in the treatment field that is constantly expanding and hinders the recovery and survival...
Production, purification and characterization of a Tannase from Aspergillus niger LCF 8
Chantal Barthomeuf, F Regerat, Henri Pourrat · 1994 · Journal of Fermentation and Bioengineering · 120 citations
Reading Guide
Foundational Papers
Start with Barthomeuf et al. (1994) for Aspergillus niger purification protocol (120 citations), then Jiménez et al. (2014) for Lactobacillus tannase characterization (138 citations), as they establish core chromatography and kinetic methods.
Recent Advances
Study Rodríguez et al. (2007, 114 citations) for cell-free extract degradation and Iwamoto et al. (2008, 109 citations) for gene cloning advances.
Core Methods
Core techniques: ion-exchange chromatography, SDS-PAGE for MW, Lineweaver-Burk plots for kinetics, applied in Barthomeuf (1994) and Jiménez (2014).
How PapersFlow Helps You Research Microbial Tannase Purification Characterization
Discover & Search
Research Agent uses searchPapers with 'microbial tannase purification Aspergillus Lactobacillus' to find Barthomeuf et al. (1994), then citationGraph reveals 120 citing papers on Aspergillus niger methods, and findSimilarPapers uncovers Iwamoto et al. (2008) for gene cloning parallels.
Analyze & Verify
Analysis Agent applies readPaperContent to extract purification yields from Barthomeuf et al. (1994), verifies kinetic data via verifyResponse (CoVe) against Jiménez et al. (2014), and runs PythonAnalysis with NumPy to plot Km/Vmax from multiple papers, graded by GRADE for evidence strength.
Synthesize & Write
Synthesis Agent detects gaps in Lactobacillus vs. Aspergillus purification via gap detection, flags contradictions in molecular weights; Writing Agent uses latexEditText for methods section, latexSyncCitations for 10+ papers, and latexCompile to generate enzyme kinetics diagrams.
Use Cases
"Compare purification yields of tannase from Aspergillus niger and Lactobacillus plantarum"
Research Agent → searchPapers → readPaperContent (Barthomeuf 1994, Jiménez 2014) → runPythonAnalysis (pandas comparison table of yields, specific activity) → GRADE verification → exportCsv of results.
"Generate LaTeX figure of tannase purification chromatography steps"
Synthesis Agent → gap detection on protocols → Writing Agent → latexEditText (describe DEAE-Sepharose steps from Barthomeuf 1994) → latexSyncCitations → latexCompile → exportMermaid for flow diagram.
"Find code for tannase kinetic modeling from papers"
Research Agent → paperExtractUrls (from Iwamoto 2008) → paperFindGithubRepo (enzyme kinetics repos) → githubRepoInspect → runPythonAnalysis (adapt Michaelis-Menten fitting code to TanBLp data from Jiménez 2014).
Automated Workflows
Deep Research workflow scans 50+ papers on tannase purification via searchPapers → citationGraph, producing structured report with yield tables from Barthomeuf (1994) and Kar (1999). DeepScan applies 7-step analysis: readPaperContent → verifyResponse (CoVe) on kinetics → runPythonAnalysis for stats. Theorizer generates hypotheses on type I/II classification from L. plantarum data in Rodríguez (2007).
Frequently Asked Questions
What is microbial tannase purification characterization?
It covers chromatography-based isolation of tannases from Aspergillus and Lactobacillus, plus molecular weight and kinetic analysis to classify types I and II.
What are common purification methods?
Methods include ammonium sulfate precipitation, DEAE-Sepharose ion-exchange, and gel filtration, as detailed in Barthomeuf et al. (1994) for Aspergillus niger.
What are key papers?
Foundational works: Jiménez et al. (2014, 138 citations) on L. plantarum TanBLp; Barthomeuf et al. (1994, 120 citations) on A. niger purification.
What open problems exist?
Challenges include standardizing kinetic parameters across strains and improving yields for industrial gallic acid production, per Kar et al. (1999).
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