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BRS2 — Methylation & One-Carbon Metabolism

BRS2(SM-SNP1) - SNP-Sensitive Methylation Efficiency​

1. Definition​

Variant-sensitive interpretation layer describing how MTHFR, COMT cross-talk, and BDNF Val66Met may alter methylation efficiency, methyl-donor responsiveness, and downstream neurochemical tone — without redefining core BRS2 methylation mechanisms (BRS2-FM1-PM1, BRS2-FM1-PM3). Therapeutic-area framing belongs on the BRS2 hub; this page does not assert biomarkers, diagnoses, or treatment efficacy.

2. Target Functional Outcome / Phenome​

These mappings are translational relationships, not single-mechanism outcome claims. Phenomes are emergent functional patterns supported by multiple interacting PMs across the BRAIN Framework.

No direct functional outcome relationship currently mapped.

3. Intervention Breakdown​

Food-State Leaning

4. Functional Role​

↑ methylation-efficiency support; ↑ cofactor sufficiency awareness; ↑ downstream neurochemical resilience support

5. Mechanistic Basis​

Summary​

Variant-sensitive efficiency can shift donor and cofactor responsiveness under the same remethylation and SAMe biology (BRS2(KC1), BRS2-FM1-PM1, BRS2-FM1-PM3, BRS2(FM1)). Outcomes vary by genotype and diet pattern; BRS2(SM-SNP1) explains why that variability matters without deterministic SNP outcome claims.

Variant-sensitive pathways
  • MTHFR — folate, B2, and B12 sufficiency weigh more when folate-pathway efficiency is reduced [1]
  • COMT — catecholamine clearance may interact with methylation-adjacent meal patterns; see BRS1(SM-SNP1) for BRS1 clearance framing [2]
  • BDNF Val66Met — methionine–homocysteine and plasticity relevance downstream [2]
  • Omega-3 / polyphenols — membrane and resilience support alongside one-carbon inputs [3]

6. Underlying Mechanisms and Requirements​

6.1 Cofactors and Supporting Inputs​

  • B2, folate, B12, omega-3

6.2 KCs (Key Constraints)​

6.3 Connected Primary Mechanisms (PMs)​

6.4 Connected Functional Mechanisms (FMs)​

6.5 Connected Mechanisms​

  • BRS1 — COMT / catecholamine clearance cross-talk (BRS1(SM-SNP1))
  • BRS3 — inflammatory and redox context for omega-3 and polyphenol co-support alongside one-carbon inputs

7. Dietary Levers​

Diet

  • B12 ← dairy, seafood, liver

  • B2 ← eggs, dairy, leafy greens

  • Betaine ← beetroot, spinach

  • Choline ← eggs, liver

  • Folate ← leafy greens, legumes, liver

  • Methionine ← eggs, meat, fish

  • Omega-3 (EPA/DHA) ← oily fish, sardines, mackerel

  • Polyphenols ← berries, green tea, dark leafy greens

  • Stable dietary patterns prioritising methyl-donor continuity may support variant-sensitive responsiveness (meal-pattern lever; not a single-substrate map).

8. Lifestyle Levers​

Lifestyle
  • Consistent daily nutrient coverage
  • Sleep and stress recovery supporting metabolic resilience
  • Avoid genotype-driven high-dose nutrient interpretation

9. Scoreable Inputs & Modulation Signals​

Scoreable Input Categories
Input CategoryExample InputsSM-SNP1 relevance
Functional Property Potentialsconsistent_methyl_donor_coverage; riboflavin_folate_contextPrecursor and cofactor scoring context.
Realised Functional Stateshomocysteine_modulation_context; omega3_status_contextVariant-sensitive methylation response patterns.
Substance / Nutrient Signalsfolate; B12; B2; omega-3; methionineSubstrate and cofactor signals from connected PM1/PM3.
Preparation Transformationsminimally_processed; whole_food_matrixFood-matrix support for donor continuity.

10. References​

  1. Aragão et al. (2024)
  2. Hünnerkopf et al. (2007)
  3. Ziaei et al. (2024)