BRS2(FM3) - Methylation–Membrane Coupling
1. Definition
Integrated regulation of SAMe Synthesis, and Phospholipid Methylation, influencing SAMe-dependent phospholipid methylation to neuronal membrane integrity and signaling.
2. Functional Outcome Context
These outcomes describe translational contexts for the FM as an integrated biological capacity. They are not single-mechanism treatment claims. Confidence may increase where multiple child PMs converge on the same functional outcome.
No functional outcome context currently mapped.
3. Functional Role
↑ phospholipid methylation; ↑ membrane fluidity; ↑ receptor signaling stability
4. Mechanistic Basis (Integrated FM Narrative)
Methylation–membrane coupling emerges from the coordinated interaction of several primary mechanisms and supporting biological pools.
4.1 Core Primary Mechanisms
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BRS2-FM1-PM3 — SAMe Synthesis Production of S-adenosylmethionine from methionine to supply universal methyl donation.
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BRS2-FM3-PM7 — Phospholipid Methylation SAMe-dependent methylation of phospholipids affecting membrane composition and receptor function.
4.2 Integrated Functional Narrative
Together, these PMs operationalise BRS2(FM3) as a coordinated methylation–membrane coupling control point.
4.3 Functional Failure Modes
Methylation–membrane coupling may weaken when one-carbon donor pool, or methionine & transsulfuration substrate pool become inadequate, or when supporting biological pools are chronically strained.
Low intake of methyl-donor-rich foods may reduce BRS2(KC1) — One-Carbon Donor Pool. Poor dietary choline availability may further strain pool availability, low folate availability, increased methylation demand, impaired remethylation efficiency, while dietary patterns with chronically low donor-pool support.
Low protein quality or insufficient sulfur-amino-acid intake may reduce BRS2(KC2) — Methionine & Transsulfuration Substrate Pool. Chronic methionine substrate insufficiency may further strain pool availability, increased glutathione demand, increased oxidative burden driving sulfur-amino-acid utilisation, while restrictive dietary patterns reducing substrate diversity.
These pressures may impair BRS2-FM1-PM3 — SAMe Synthesis, and weaken BRS2-FM3-PM7 — Phospholipid Methylation. At the FM level, this may shift BRS2(FM3) toward reduced methylation–membrane coupling performance.
5. Connected Mechanisms
- None listed