Molecular dynamics modeling of extruded plant proteins for food processing innovation
Research program investigating protein-starch interactions during extrusion using molecular dynamics simulations. Aims to characterize molecular-level changes in extruded plant proteins to optimize functional and structural properties in food processing, with validation through cotton flour-based extruded feed for shrimp.
Overview
This research program addresses a critical gap in food extrusion technology by investigating the molecular-level interactions between proteins and starch during extrusion processing. Extrusion is widely used in food manufacturing, yet the specific protein-starch interactions and their effects on functional and structural properties of extruded products remain poorly understood. By applying advanced molecular dynamics simulations alongside experimental extrusion trials, this work seeks to revolutionize protein extrusion and enable more precise control over the texture, nutrition, and performance of extruded food products.
The research carries practical significance for the aquaculture feed industry, where extruded feeds must deliver balanced nutrition, water stability, and digestibility. The program will design and validate an extruded model feed based on gossypol-free cotton flour for shrimp, demonstrating how molecular-level insights translate into improved real-world feed products.
Technical specifications
Core methodology:
- COMPASS molecular dynamics simulations to model protein-starch interactions at the molecular level
- 10 amorphous cells generated for each starch-protein complex, using 75 starch molecules and 20 protein molecules at 298 K
- Energy minimization applied to the lowest-energy configuration selected from each set of 10 cells
- Flory-Huggins interaction solubility parameters evaluated to quantify compatibility between protein and starch biopolymers
- Experimental extrusion using gossypol-free cotton flour as a model feedstock
- Response surface methodology superposition to optimize extrusion parameters for shrimp feed applications
Key research focus areas:
- Protein-polysaccharide interaction mechanisms in extruded systems
- Structural changes at the molecular level during extrusion
- Functional property enhancement through controlled protein-starch interactions
- Application to aquaculture feed development
Technology readiness level
The research is at an early-to-mid stage, combining computational modeling with planned experimental validation. The molecular dynamics simulation framework using COMPASS force fields is well-established, and the experimental extrusion component will generate empirical data to validate computational predictions. Future validation plans include producing an optimized cotton flour-based extruded feed for shrimp, which will serve as a practical demonstration of the molecular insights gained from simulation work. Additional development and testing will be needed before commercial-scale application.
About New Mexico State University
New Mexico State University is a comprehensive public land‑grant research university in Las Cruces with multiple campuses and a statewide footprint. Industry connects through an on‑campus research and technology park, shared core labs, and field sites that include agricultural experiment stations across New Mexico. A statewide Cooperative Extension Service links companies with growers, communities, and real‑world testbeds, while proximity to White Sands Missile Range and Spaceport America offers access to distinctive Southwest testing environments. Faculty secure competitive federal support from NSF, USDA, DOE, NASA, and the U.S. Department of Defense. A dedicated technology transfer office advances IP, licensing, startup formation, and corporate collaboration.
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