Reaction kinetics, energy profiles, and molecular attributes of a carbohydrate-oxidizing enzyme from environmental bacterial strains

Abstract

Carbohydrate-oxidizing enzymes derived from environmental bacterial strains represent a crucial class of biocatalysts involved in redox transformations, energy conversion, and metabolic regulation. This study presents a comprehensive systems-level analysis of reaction kinetics, energy distribution patterns, and molecular interaction attributes of such an enzyme sourced from environmental Pseudomonas and Actinomyces isolates. The primary objective is to integrate kinetic modeling, thermodynamic constraints, and network-based structural representations to understand enzymatic performance under variable biochemical conditions.

A hybrid methodological framework combining kinetic rate modeling, bond graph energy analysis, and hypergraph-based reaction network representation is employed. The kinetic component evaluates substrate-dependent catalytic rates under non-linear saturation regimes. Thermodynamic analysis ensures compliance with Gibbs free energy constraints, while bond graph modeling captures distributed energy dissipation pathways during catalytic turnover. Additionally, hypergraph theory is applied to identify multi-molecular reaction cycles and enzymatic regeneration pathways.

Results indicate that enzymatic behavior deviates from classical Michaelis–Menten assumptions under high substrate load, exhibiting nonlinear flux saturation and energy redistribution effects. Bond graph analysis reveals that a significant fraction of reaction energy is dissipated through non-productive thermal channels, particularly under elevated catalytic turnover conditions. Hypergraph modeling identifies stable catalytic cycles that contribute to enzyme resilience but are sensitive to environmental perturbations such as temperature variation.

Sensitivity analysis highlights substrate affinity and activation energy as dominant regulatory parameters controlling enzymatic efficiency. Comparative interpretation with existing enzymatic systems suggests that environmental bacterial enzymes prioritize functional adaptability over maximal catalytic efficiency.

Overall, the study demonstrates that carbohydrate-oxidizing enzymes operate as integrated energy-processing networks rather than isolated catalytic units. The findings contribute to a deeper understanding of microbial enzymology by linking reaction kinetics, energy flow, and molecular structure within a unified analytical framework.