CKMBITII Human

Creatine Kinase MB Isoenzyme Type-II Human Recombinant
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Description

Production and Purification

The recombinant protein is synthesized using Pichia pastoris expression systems, followed by proprietary chromatographic purification .

Key Production Parameters:

  • Expression System: Pichia pastoris (efficient for eukaryotic post-translational modifications)

  • Purity: >95% as verified by SDS-PAGE

  • Formulation:

    • 10 mM Tris-HCl, 0.5 mM EDTA, 0.5 mM DTT, 50% glycerol (pH 6.8)

    • Alternative buffers: 20 mM Tris-HCl, 1 mM EDTA, 1 mM DTT

Biological Activity

CKMBITII demonstrates high enzymatic activity, critical for its diagnostic utility:

Assay MethodActivity (IU/mg)TemperatureSource
Kinetic assay at 340 nm65037°C
Creatine phosphate method89237°C
Kinetic assay88337°C

Variations in reported activity may arise from differences in assay protocols or protein batches .

Diagnostic Applications

CKMBITII serves two primary roles:

  1. MI Biomarker: Released from damaged myocardium during MI, CKMBITII is cleaved in serum to form CKMBITI. This conversion provides a temporal marker for MI onset .

  2. Calibration Standard: Used to standardize immunoassays and enzymatic tests for cardiac injury .

Research Implications

CKMBITII’s role extends beyond cardiology into neuromuscular disease research, particularly for conditions like mitochondrial disorders and inflammatory myopathies . Its high specificity for cardiac tissue makes it invaluable for distinguishing cardiac vs. skeletal muscle damage in clinical assays .

Product Specs

Introduction
CK-MB Type II, characterized by its naturally occurring carboxy-terminal amino acid lysine, is a crucial marker in myocardial infarction (MI) diagnosis. During an MI, damaged heart muscle releases CK-MB Type II. In the bloodstream, its C-terminal lysine undergoes cleavage, resulting in the formation of CK-MB Type I. This distinctive process is leveraged for MI diagnosis.
Description
Recombinantly produced in Pichia Pastoris, CKMBITII Human effectively reacts with polyclonal antibodies specific to MB Isoenzyme in ELISA assays.
Physical Appearance
Sterile Filtered, clear and colorless liquid.
Formulation
Each milligram of protein is formulated in a buffer containing 10mM Tris-HCl (pH 6.8), 0.5mM EDTA, 0.5mM DTT, and 50% (v/v) glycerol.
Stability
For optimal stability, store CKMBITII below -18°C. While it remains stable at 15°C for up to 7 days, repeated freezing and thawing should be avoided.
Biological Activity
Enzymatic activity, determined using a kinetic assay at 340nm, was found to be 650 IU/mg at a temperature of 37 degrees Celsius.
Synonyms
Creatine Kinase MB Isoenzyme Type-II, CKMBITII, CKMBI, CKMB.
Source
Pichia Pastoris.

Q&A

What is CKMBITII human recombinant protein and how is it produced?

CKMBITII human recombinant is a glycosylated polypeptide chain produced in Pichia pastoris expression systems, engineered to maintain an identical amino acid sequence to the native human protein while allowing controlled production for research purposes. The protein undergoes post-translational modifications, particularly glycosylation, which affects its structural and functional properties. The expression in P. pastoris offers advantages over bacterial systems, as this yeast can perform eukaryotic protein modifications while maintaining high yield production .

Standard production involves several critical steps:

  • Gene synthesis and codon optimization for Pichia pastoris

  • Insertion into appropriate expression vectors with selection markers

  • Transformation into competent P. pastoris cells

  • Selection of high-expressing transformants

  • Scale-up fermentation under controlled conditions

  • Protein purification through chromatographic techniques

The advantage of using Pichia pastoris lies in its ability to perform post-translational modifications while maintaining relatively high protein yields in a system less complex than mammalian cell culture.

What experimental design considerations are essential when studying CKMBITII human in laboratory settings?

When designing experiments involving CKMBITII human recombinant protein, researchers must consider several crucial methodological factors to ensure valid and reproducible results. Experimental design must account for the protein's specific characteristics and research context .

Key experimental design considerations include:

  • Control groups establishment: Include appropriate negative controls (buffer-only, irrelevant protein) and positive controls (native human protein when available) to validate experimental outcomes.

  • Random assignment of subjects/samples: Distribute experimental units randomly to minimize systematic bias, particularly in studies examining CKMBITII's effects on biological systems .

  • Appropriate replication: Determine statistically significant sample sizes through power analysis to detect expected effect sizes.

  • Variable identification and control: Identify and control variables that might influence CKMBITII stability and function (temperature, pH, ionic strength, presence of proteases).

  • Validation approaches: Implement multiple complementary methods to confirm findings (e.g., structural analysis via circular dichroism and functional assays).

As noted in experimental design literature, laboratory experiments offer precise control but may not fully reflect real-world conditions, highlighting the importance of field validation when translating findings .

How should researchers approach quantitative and qualitative data integration when studying CKMBITII human?

Integrating quantitative and qualitative evidence when studying CKMBITII human requires methodological rigor to develop a comprehensive understanding of both the protein's biochemical properties and its broader biological significance .

An effective mixed-method approach includes:

  • Convergent parallel design: Collect both quantitative data (binding kinetics, activity assays, structural measurements) and qualitative observations (cellular morphological changes, tissue-level effects) simultaneously.

  • Sequential explanatory design: Use qualitative investigations to explain unexpected quantitative findings about CKMBITII function or activity.

  • Framework synthesis implementation: Organize diverse evidence types within a structured framework that addresses both mechanistic questions and contextual factors affecting CKMBITII behavior .

This integration benefits from creating knowledge maps that identify methodological gaps and geographic distribution of evidence, as demonstrated in related biomedical research syntheses . When evidence of direct effects is limited, integration of diverse methodological approaches becomes particularly valuable to construct a high-level understanding of the protein's biological role.

What are the optimal methods for evaluating post-translational modifications of CKMBITII human and their functional implications?

Post-translational modifications (PTMs) of CKMBITII human, particularly glycosylation patterns, critically influence its structure-function relationships. Advanced researchers should implement a multi-analytical approach to characterize these modifications comprehensively .

A methodological framework for PTM analysis includes:

  • Mass spectrometry-based characterization: Employ LC-MS/MS with collision-induced dissociation (CID) and electron transfer dissociation (ETD) to map glycosylation sites and patterns. This approach allows for both identification and relative quantification of glycoforms.

  • Site-directed mutagenesis validation: Systematically modify predicted glycosylation sites to evaluate their functional significance through comparative activity assays.

  • Glycoproteomic profiling: Compare glycosylation patterns between recombinant and native forms using specialized glycan analysis techniques.

Analytical TechniqueApplicationAdvantagesLimitations
MALDI-TOF MSIntact glycoprotein analysisSpeed, sensitivityLimited structural information
LC-MS/MSGlycopeptide mappingSite-specific informationComplex data interpretation
Lectin microarraysGlycan pattern screeningHigh-throughputSemi-quantitative
NMR spectroscopy3D glycan structureDetailed conformational dataRequires significant sample amounts

When analyzing the functional implications of PTMs, researchers should design comparative assays that isolate specific modification effects while controlling for other variables. This approach helps establish causal relationships between structural modifications and functional outcomes.

How can researchers effectively design experiments to understand CKMBITII human interactions within complex biological systems?

Understanding CKMBITII human's behavior in complex biological systems requires experimental designs that address both reductionist and systems-level questions. Drawing from complexity-aware methodological frameworks in biomedical research, effective approaches include :

  • Systems perturbation studies: Introduce CKMBITII into biological systems under controlled conditions, then measure system-wide responses using omics technologies (transcriptomics, proteomics, metabolomics) to map interaction networks.

  • Context-dependency evaluation: Test CKMBITII function across different cellular/tissue contexts to identify condition-specific behaviors and adaptations of the biological system to protein introduction .

  • Temporal dynamics assessment: Implement time-course experiments to capture how systems adapt to CKMBITII over time, revealing both immediate and emergent properties of interactions.

  • Mixed-method design implementation: Integrate quantitative measurements with qualitative observations to develop comprehensive models of CKMBITII's biological role .

As noted in systems biology literature, researchers should anticipate emergent properties that cannot be predicted from reductionist experiments alone. This necessitates iterative experimental designs that adapt based on initial findings .

What approaches are most effective for resolving contradictory data in CKMBITII human research?

When faced with contradictory findings in CKMBITII human research, researchers should implement systematic resolution strategies rather than dismissing conflicting results. Effective approaches draw from established methodological frameworks in biomedical research :

  • Methodological heterogeneity examination: Carefully analyze differences in experimental conditions, protein preparations, and analytical methods that might explain discrepancies.

  • Contextual factor identification: Evaluate whether contradictions stem from unrecognized context-dependencies, such as cellular environmental differences or uncontrolled variables .

  • Mixed-method triangulation: Use complementary methodologies to investigate contradictory findings from multiple perspectives, potentially revealing underlying complexity rather than true contradiction .

  • Systematic review and meta-analysis: When sufficient studies exist, conduct formal evidence synthesis using established frameworks to integrate conflicting results and identify moderating factors.

Resolution StrategyImplementation ApproachApplication Example
Contextual analysisIdentify conditions where each contradictory result occursExamining pH-dependency of apparently contradictory binding studies
Methodological reconciliationReproduce studies using standardized methodsStandardizing protein preparation and storage protocols
Biological validationTest predictions from competing explanationsDesigning experiments that differentiate between alternative mechanistic models
Sequential mixed-methodUse qualitative approaches to explain quantitative contradictionsFollowing unexpected quantitative results with in-depth structural studies

Researchers should view contradictions as valuable opportunities to develop more nuanced understanding of CKMBITII's complex biological behavior rather than as experimental failures.

How does CKMBITII human research integrate into broader systems biology frameworks?

CKMBITII human research benefits from integration within systems biology frameworks that situate molecular findings in their broader biological context. This integration requires methodological approaches that connect multiple levels of biological organization :

  • Multi-scale experimental design: Develop coordinated experiments that examine CKMBITII at molecular, cellular, tissue, and organism levels, creating an integrated understanding across biological scales.

  • Network analysis implementation: Map CKMBITII within relevant protein interaction networks using both experimental approaches (co-immunoprecipitation, yeast two-hybrid) and computational predictions.

  • Perturbation experiments: Systematically modify system components to observe how CKMBITII function changes in response to system alterations, revealing conditional dependencies .

  • Computational modeling integration: Develop mathematical models incorporating CKMBITII interactions that can generate testable predictions about system behavior under various conditions.

These approaches recognize that understanding CKMBITII requires examining not just the protein itself, but how the biological system changes when the protein is introduced, modified, or removed . Such system-adaptive properties often reveal function in ways that isolated biochemical studies cannot.

What methodological approaches best address the complexity of CKMBITII human in different experimental contexts?

The complexity of CKMBITII human behavior across different experimental contexts requires methodological approaches that systematically account for contextual influences while maintaining experimental rigor :

  • Context mapping: Systematically characterize how experimental variables (pH, temperature, ionic conditions, cellular environment) influence CKMBITII structure and function, creating a comprehensive context-dependency map.

  • Factorial experimental design: Implement multi-factorial experiments that can identify interaction effects between contextual variables, revealing complex dependencies that single-variable experiments might miss .

  • Mixed-method synthesis: Integrate quantitative measurements with qualitative contextual data to develop richer understanding of contextual influences on CKMBITII behavior .

  • Realist evaluation frameworks: Adopt "context-mechanism-outcome" frameworks that explicitly link contextual factors to mechanistic processes and outcomes, providing explanatory power for variable results.

As demonstrated in complexity-aware research, these approaches help researchers move beyond simplistic universal claims about CKMBITII function toward more nuanced understandings of when, where, and how the protein functions under different conditions .

How should researchers approach the translation of CKMBITII human findings from in vitro to in vivo systems?

Translating CKMBITII human research from in vitro to in vivo systems requires methodological bridges that account for increasing system complexity while maintaining mechanistic understanding. Effective translational approaches include :

  • Staged complexity progression: Systematically increase system complexity from purified protein studies to cell-free systems, cell culture, ex vivo tissue preparations, and finally animal models.

  • Parallel systems validation: Test key hypotheses simultaneously across multiple model systems to distinguish conserved mechanisms from system-specific effects.

  • Field to laboratory integration: Combine controlled laboratory experiments with observational studies in more natural contexts, balancing internal and ecological validity .

  • Mechanistic focus maintenance: Trace specific mechanisms across translational stages rather than simply observing phenotypic outcomes, ensuring continuity of understanding.

Translational StageMethodological FocusKey ConsiderationsValidation Approaches
Purified proteinFundamental biochemical propertiesBuffer conditions mimicking physiological environmentsBiophysical characterization
Cell-free systemsMolecular interactionsComponent complexity managementReconstitution experiments
Cell cultureCellular responsesCell type selection relevant to in vivo functionReporter systems, imaging
Ex vivo tissueTissue-level effectsTissue viability maintenanceComparative histology, functional assays
Animal modelsSystemic integrationModel selection based on research questionMultiple model comparison, humanized models

This translational approach acknowledges the limitations of controlled experiments while seeking to maintain mechanistic understanding across increasingly complex systems .

What emerging methodologies show promise for advancing CKMBITII human research?

Several cutting-edge methodological approaches show particular promise for deepening our understanding of CKMBITII human structure, function, and biological significance:

  • Single-molecule biophysics: Techniques like single-molecule FRET and optical tweezers can reveal dynamic aspects of CKMBITII function not accessible through ensemble measurements.

  • Advanced glycoproteomics: Emerging mass spectrometry approaches combined with machine learning algorithms are enhancing our ability to characterize complex glycosylation patterns with unprecedented detail.

  • Cryo-electron microscopy: Recent advances in cryo-EM resolution enable visualization of glycoprotein structures at near-atomic resolution without crystallization requirements.

  • Systems biology integration: Computational approaches that integrate multi-omics data can place CKMBITII in broader biological context and predict novel functions or interactions.

  • Mixed-method synthesis frameworks: Advanced approaches for integrating quantitative and qualitative evidence can provide more comprehensive understanding of complex biological phenomena .

These methodologies share a common thread of addressing the limitations of traditional approaches through technological innovation, integration of multiple data types, and explicit consideration of biological complexity.

How can researchers develop comprehensive evaluation frameworks for CKMBITII human studies?

Developing comprehensive evaluation frameworks for CKMBITII human research requires systematic approaches that integrate multiple evidence types while maintaining methodological rigor :

  • Mixed-method evaluation design: Combine quantitative metrics of protein function with qualitative assessments of biological impact to create richer evaluative frameworks .

  • Complexity-aware evaluation criteria: Develop evaluation criteria that explicitly account for contextual dependencies and system adaptivity rather than seeking universal claims .

  • Triangulation protocols: Implement systematic triangulation across methodologies, creating protocols that specify how different evidence types should be weighted and integrated.

  • Translational validity assessment: Evaluate how findings maintain or change their significance across different experimental systems and contexts.

These evaluation frameworks should be developed collaboratively among researchers with diverse methodological expertise, creating shared standards that advance the field while acknowledging the inherent complexity of glycoprotein biology.

Product Science Overview

Introduction

Creatine Kinase (CK) is a crucial enzyme involved in energy homeostasis, facilitating the reversible transfer of phosphate between ATP and various phosphogens such as creatine phosphate . CK exists in multiple isoforms, including CK-MM (muscle), CK-BB (brain), and CK-MB (myocardial). The CK-MB isoenzyme is particularly significant as a biomarker for myocardial injury, such as in the case of a heart attack .

Structure and Function

CK-MB is a dimeric protein composed of two subunits: M (muscle) and B (brain). The Type-II isoenzyme possesses the naturally occurring carboxy-terminal amino acid lysine, which is cleaved in the bloodstream during a myocardial infarction, creating CK-MB Type-I . This structural change is crucial for its role as a biomarker.

Recombinant Production

Recombinant human CK-MB Type-II is produced using various expression systems, including Escherichia coli and Pichia pastoris . The recombinant form is engineered to be identical to the native enzyme, ensuring its functionality and stability. The production process involves tandem affinity purification (TAP) to isolate the CK-MB isoenzyme from other isoforms .

Clinical Applications

Recombinant CK-MB Type-II is widely used in clinical laboratories as a standard or reference material for measuring CK-MB activity or mass. Its high purity and stability make it an ideal candidate for diagnostic applications, particularly in the context of myocardial injury . The enzyme’s activity is defined by its ability to catalyze the transphosphorylation of phosphate from creatine phosphate to ADP, a critical reaction in energy metabolism .

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