What Free-energy calculations is designed to address
Free-energy calculations is not a one-score software run. It is a reviewable analysis path organised around “Can relative binding trends across candidates or mutations be distinguished robustly?”, beginning with input quality, comparators and intended use of evidence before selecting an appropriate methodological level.
The work centres on MM/GBSA and MM/PBSA, Per-residue energy decomposition, ABFE, RBFE and FEP and links Structure series and mappings, Equilibrated simulation systems, Accuracy and compute-cost targets directly to Free-energy estimates with uncertainty, Convergence diagnostics, Candidate or mutation priorities. Reporting separates supporting evidence, conflicting signals, parameter dependence and conditions for follow-up validation.
Can relative binding trends across candidates or mutations be distinguished robustly?
Suitable research settings
- Projects that need to answer “Can relative binding trends across candidates or mutations be distinguished robustly?”
- Studies requiring consistent comparison and quality control across MM/GBSA and MM/PBSA and Per-residue energy decomposition
- Teams that need Free-energy estimates with uncertainty, Convergence diagnostics, Candidate or mutation priorities with complete reproduction records
Analyses included in the service
MM/GBSA and MM/PBSA
Apply MM/GBSA and MM/PBSA to structure series and mappings and produce free-energy estimates with uncertainty. First confirm that structure series and mappings can support the downstream analysis.
Per-residue energy decomposition
Apply Per-residue energy decomposition to equilibrated simulation systems and produce convergence diagnostics. Use consistent systems, conditions and naming across adjacent steps so comparisons remain reviewable.
ABFE, RBFE and FEP
Apply ABFE, RBFE and FEP to accuracy and compute-cost targets and produce candidate or mutation priorities. Use consistent systems, conditions and naming across adjacent steps so comparisons remain reviewable.
Select the methodological level for the question
| Method | Best suited to | Watch for |
|---|---|---|
| MM/GBSA and MM/PBSA | Establishing the input baseline and initial search space for Free-energy calculations | Errors in Free-energy calculations input state, structure or data definition propagate through later steps |
| Per-residue energy decomposition | Comparing candidate states, features or mechanisms in Free-energy calculations to form priorities | Free-energy calculations comparisons require consistent conditions; raw scores are not experimental measurements |
| ABFE, RBFE and FEP | Reviewing key Free-energy calculations results, interpreting differences and recording uncertainty | Calculated free energies are model estimates, not measurements; convergence and system preparation govern interpretation. |
From question definition to reproducible delivery
Frame the research question
Use “Can relative binding trends across candidates or mutations be distinguished robustly?” to define comparators, decision use, experimental context and the strength of evidence the computation can support.
Review and curate inputs
Review Structure series and mappings, Equilibrated simulation systems, Accuracy and compute-cost targets; resolve structure, naming, unit, batch or microstate issues and record any remaining assumptions.
Design methods and controls
Combine MM/GBSA and MM/PBSA, Per-residue energy decomposition, ABFE, RBFE and FEP with controls, replicates, sensitivity checks or independent evidence, defining decision criteria before computation.
Compute with quality control
Run Free-energy calculations, including MM/GBSA and MM/PBSA, in a reproducible environment; retain inputs, versions, parameters, logs and intermediate outputs, and flag convergence, sampling, data-quality and applicability issues.
Interpret and deliver
Organise Free-energy estimates with uncertainty, Convergence diagnostics, Candidate or mutation priorities while separating direct observations, model inference and working hypotheses, then prioritise experiments or follow-up computation.
What is needed and what is delivered
Inputs
- Structure series and mappings
- Equilibrated simulation systems
- Accuracy and compute-cost targets
Optional supporting inputs
- Known positive, negative or reference systems for basic expectation checks in Free-energy calculations
- Replicate experiments, external databases or literature evidence relevant to Free-energy calculations
- Timing, compute, software-compatibility or delivery-format constraints for Free-energy calculations
Deliverables
- Free-energy estimates with uncertainty
- Convergence diagnostics
- Candidate or mutation priorities
Quality control and interpretation limits
How results are reviewed
- Free-energy calculations: Audit starting structures, protonation, parameters and level of theory
- Free-energy calculations: Check equilibration, energetics, geometry and numerical stability
- Free-energy calculations: Assess replicates, convergence and sensitivity to key parameters
- Free-energy calculations: Compare model estimates with experiments or higher-level methods when available
Boundaries that remain
- Calculated free energies are model estimates, not measurements; convergence and system preparation govern interpretation.
- Free-energy calculations results apply only to the recorded inputs, parameters, models and sampling scope. Changes to input state, comparison conditions or project objectives may require new computation.
Common ways projects begin
From one system to comparable candidates
When structure series and mappings are available but decision criteria are inconsistent, establish baselines and controls, then use MM/GBSA and MM/PBSA, Per-residue energy decomposition, ABFE, RBFE and FEP to build candidate tiers and deliver free-energy estimates with uncertainty with a difference analysis.
Independent review of existing results
When results relevant to Free-energy calculations conflict, revisit structure series and mappings and analytical assumptions around MM/GBSA and MM/PBSA, then add replicates, sensitivity checks or alternative models to distinguish signal from method conditions.
Questions before a project begins
What is required before Free-energy calculations begins?
The minimum inputs are Structure series and mappings, Equilibrated simulation systems, Accuracy and compute-cost targets. If information is incomplete, an input audit identifies which gaps change method selection and which can be handled as explicit assumptions.
Can the result directly prove “Can relative binding trends across candidates or mutations be distinguished robustly?”?
No single model output should be treated as experimental fact. Calculated free energies are model estimates, not measurements; convergence and system preparation govern interpretation. Quality controls determine whether results support a priority or mechanism hypothesis; key conclusions still require appropriate experiments or independent data.
Which reusable files are delivered?
Typical delivery includes Free-energy estimates with uncertainty, Convergence diagnostics, Candidate or mutation priorities, together with input-curation records, key parameters, software and database versions, quality-control results, editable figures and limitations. Exact raw formats are confirmed in the project plan.