anabolism

Precursor-to-product route

Record the proposed biosynthetic route and the evidence distinguishing construction from relocation or breakdown.

1. Which molecular products are formed from which precursors in the activity being modelled? definition
2. What establishes product formation rather than uptake, redistribution or operation in a degradative direction? boundary

Bounded anabolic activity

Record whether the subject is an individual route, coordinated synthesis programme or aggregate anabolic activity.

1. In which organism, cell or tissue, compartment and time interval is this activity being considered? boundary
2. Which reactions count as biosynthesis here, and which shared or supporting reactions belong to neighbouring processes? boundary

Accessible building material

Record precursor identities, origins and access to the location of synthesis.

1. Which required precursors come from uptake, internal synthesis or recycling? provenance
2. What measurements establish their availability in the compartment where synthesis occurs? measurement

Material fate

Record evidence of incorporation and competing demands on the same material.

1. What evidence traces precursor material into newly synthesised products? measurement
2. Which competing pathways, storage pools or export routes affect the material available for this synthesis? boundary

Energy coupling requirements

Record identified energy inputs and distinguish direct reaction costs from precursor preparation and supporting processes.

1. Which reactions require energetic coupling, and which carriers, gradients or activated intermediates provide it? definition
2. What energy demand per product is supported, and does its accounting include precursor activation and transport? measurement

Redox resource dependence

Record whether reducing power is required and whether its supply constrains synthesis.

1. Does this route require reducing equivalents, and which donors and regeneration processes are established for this context? definition
2. What evidence distinguishes a reducing-power constraint from precursor shortage or insufficient energy supply? measurement

Functional biosynthetic capacity

Record required machinery and separate its presence from demonstrated function.

1. Which enzymes, molecular complexes and compartment arrangements are required for the specified synthesis? definition
2. What establishes that this machinery is functional rather than merely detectable? measurement

Supported control and perturbation

Record evidence linking regulatory changes to synthesis and bound proposed interventions by that evidence.

1. Which nutrient signals, hormonal signals where applicable, feedback effects or cellular conditions have demonstrated effects on this route? provenance
2. Which bounded perturbation could test the suspected constraint, and what synthesis readout, competing effects and stopping conditions would be monitored? action

Supported biosynthetic flux

Record the synthesis estimate with its measurement basis, assumptions and uncertainty.

1. What is the estimated synthesis rate, over which interval and with what units and normalisation? measurement
2. Which assay or model produced the estimate, and how were precursor labelling, recycling and compartment mixing handled where relevant? provenance

Replacement versus accumulation

Record whether biosynthesis supports turnover, net accumulation or synthesis during net loss.

1. How do synthesis, degradation, import and export account for the observed change in the specified product pool? measurement
2. Does the evidence support replacement, net accumulation or net loss, and what remains unresolved when degradation or boundary flows are unmeasured? boundary

Kinds and varieties

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Protein anabolism (amino-acid incorporation, translation, and net protein deposition, including muscle protein synthesis)
• Nucleic-acid anabolism (de novo and salvage nucleotide synthesis, DNA replication, RNA synthesis)
• Lipid anabolism (de novo lipogenesis, triglyceride assembly, cholesterogenesis, membrane-lipid synthesis)
• Carbohydrate anabolism (gluconeogenesis, glycogenesis, and glycan/polysaccharide synthesis)
• Autotrophic carbon anabolism (photosynthetic or chemosynthetic CO2 fixation into biomass)
• Nitrogen assimilation and amino-acid biosynthesis (inorganic N into organic N, distinct from later protein assembly)
• Bone-matrix anabolism (osteoanabolic formation of osteoid and mineral)
• Industrial/microbial biosynthetic anabolism (fermentation pathways used to make amino acids, organic acids, antibiotics, and other cell products)

1. Which of these kinds and varieties hold for the sense of anabolism this model covers, and on what evidence? provenance

Identifiers and schemes

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Wikidata - Q184316 - Item for anabolism as a biological process; confirm on Wikidata before treating as canonical in a registry.
• Gene Ontology - GO:0009058 - biosynthetic process - the standard GO parent for anabolic pathway terms; not a perfect synonym, because GO names the chemical construction rather than the energy-coupled physiological framing.
• IUPAC Gold Book - anabolism - Controlled biochemical term in the IUPAC Compendium of Chemical Terminology; Gold Book local codes are letter-plus-digits (A0xxxx) and should be taken from the live entry rather than guessed.
• UniProt keyword - KW-0028 - Biosynthesis - annotates proteins that participate in anabolic/biosynthetic pathways, not the process itself.

1. Which of these identifiers and schemes hold for the sense of anabolism this model covers, and on what evidence? provenance

Standards and regulation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• IUPAC Compendium of Chemical Terminology (Gold Book) and IUBMB/IUPAC Joint Commission on Biochemical Nomenclature - terminology for anabolism, catabolism, and named biosynthetic pathways.
• NC-IUBMB Enzyme Nomenclature - EC numbers for enzymes of anabolic pathways (issued by the Nomenclature Committee of the International Union of Biochemistry and Molecular Biology).
• ESPEN and ASPEN clinical-nutrition guidelines (e.g. ICU protein/energy targets) - govern how an anabolic vs catabolic state is managed in feeding, not the biochemistry itself (European Society for Clinical Nutrition and Metabolism; American Society for Parenteral and Enteral Nutrition).
• WADA Prohibited List, class S1 Anabolic Agents - World Anti-Doping Agency; regulates substances used to drive anabolism in sport, not the metabolic process.
• Anabolic Steroid Control Act (United States) and equivalent national controlled-substance schedules - regulate anabolic-androgenic steroids as drugs, which are a neighbour of this concept rather than anabolism itself.

1. Which of these standards and regulation hold for the sense of anabolism this model covers, and on what evidence? provenance

Real-world use

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Clinical nutrition and ICU care classify patients as net anabolic or catabolic (nitrogen balance, lean-mass change) and titrate protein and energy to restore anabolism after injury, sepsis, or surgery.
• Endocrinology and sports medicine treat muscle protein synthesis as the operational readout of anabolism, modulated by resistance exercise, amino acids, insulin, growth hormone, IGF-1, and androgens.
• Osteoporosis practice uses osteoanabolic drugs (e.g. teriparatide, romosozumab) to stimulate bone-matrix formation rather than only slow resorption.
• Oncology and cell biology treat tumour biomass accumulation as pathological anabolism (nucleotide, protein, and lipid synthesis supporting proliferation).
• Agriculture and industrial biotechnology exploit microbial and livestock anabolism for growth, milk/egg protein, and fermentation products.
• Inborn-error clinics diagnose failures of specific biosynthetic pathways (glycogen synthase deficiency, congenital disorders of glycosylation, pyrimidine-synthesis defects).

1. Which of these real-world use hold for the sense of anabolism this model covers, and on what evidence? provenance

Typical measurements

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Nitrogen balance (net anabolic vs catabolic state) - Positive in anabolism; roughly 0 to +8 g N/day in recovering or growing adults, negative in catabolic illness (wide, diet- and illness-dependent) - g N/day
• Mixed-muscle protein fractional synthesis rate (FSR) - About 0.03-0.10 %/h in healthy adult muscle (fasted at the low end, fed/exercise-stimulated at the high end) - %/h
• Whole-body protein synthesis/turnover - Roughly 3-5 g protein per kg body mass per day in healthy adults; higher in infants and hypermetabolic illness - g·kg⁻¹·day⁻¹
• Bone-formation marker PINP (intact N-terminal propeptide of type I collagen) - On the order of 15-80 µg/L in adults, assay-, age-, and sex-dependent; rises under osteoanabolic therapy - µg/L
• Contribution of de novo lipogenesis to circulating triglyceride - Typically a few percent of VLDL-TG on mixed diets; can exceed ~20% with sustained high-carbohydrate overfeeding - % of VLDL-TG
• ATP cost of peptide-bond formation / share of resting metabolism - About 4 ATP equivalents per peptide bond; protein synthesis commonly ~15-25% of resting energy expenditure - ATP equivalents per bond; % of REE

1. Which of these typical measurements hold for the sense of anabolism this model covers, and on what evidence? provenance

Failure modes and hazards

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Anabolic resistance: aging, immobilization, inflammation, and critical illness blunt the muscle protein-synthesis response to amino acids and insulin, producing sarcopenia or ICU-acquired weakness despite feeding.
• Failed or insufficient anabolism: cachexia, failure to thrive, wound-healing failure, and osteoporosis when biosynthetic rates cannot match losses.
• Inborn errors of biosynthetic pathways: e.g. glycogen synthase deficiency (GSD 0), congenital disorders of glycosylation, and pyrimidine-synthesis defects (hereditary orotic aciduria) block specific anabolic routes.
• Pathological excess anabolism: neoplastic biomass accumulation; hepatic steatosis driven by de novo lipogenesis; obesity when lipid anabolism chronically exceeds oxidation.
• Refeeding syndrome: an abrupt shift into an anabolic state after starvation drives insulin-mediated uptake of phosphate, potassium, and magnesium and can cause hypophosphatemia, arrhythmia, and death.
• Pharmacologic drive of anabolism (anabolic-androgenic steroids): hepatotoxicity, atherogenic dyslipidemia, cardiomyopathy, hypogonadism, virilization, and psychiatric effects - hazards of stimulating the process, not of anabolism as such.

1. Which of these failure modes and hazards hold for the sense of anabolism this model covers, and on what evidence? provenance

Regional variation

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• German-language biochemistry historically names the same split Baustoffwechsel (building metabolism) vs Betriebsstoffwechsel (energy/operating metabolism); Anabolismus is now also used.
• French and older European usage often treated assimilation as the constructive counterpart of dissimilation; anabolisme is the modern term.
• Russian and some Eastern European physiology texts still use "plastic metabolism" (пластический обмен) for anabolism.
• In global gym/sports vernacular, "anabolic" commonly means anabolic-androgenic steroids rather than the metabolic process; clinical and biochemical English keep the process sense.
• ICU "anabolic state" as a feeding target is especially conventionalized in ESPEN/ASPEN (European and North American) critical-care nutrition practice.

1. Which of these regional variation hold for the sense of anabolism this model covers, and on what evidence? provenance

Neighbouring kinds and how to tell them apart

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

• Catabolism - Catabolism is the energy-releasing breakdown of larger molecules to smaller ones (often yielding ATP and reducing power); anabolism consumes ATP/NADPH to build larger molecules. The operational test is direction and energy coupling of the pathway, not the tissue in which it occurs.
• Metabolism - Metabolism is the sum of anabolism and catabolism plus the linking energy-currency reactions; a process is anabolic only if it is the constructive, energy-consuming subset.
• Biosynthesis - Biosynthesis names the chemical construction of a molecule; anabolism names that construction as a physiological, energy-coupled half of metabolism. GO and enzyme lists usually code biosynthesis; textbooks use anabolism for the metabolic framing.
• Anabolic-androgenic steroids / anabolic agents - These are drugs (or WADA-listed substances) that can stimulate anabolism, especially protein deposition; they are not the process. Separation test: a chemical identity and a pharmacological schedule vs a pathway map and energy balance.
• Growth / hypertrophy - Organismal or tissue growth can result from anabolism but also from hyperplasia, hypertrophy, water, and mineral accretion. Separation test: isotopic or balance measures of net macromolecule synthesis vs a change in mass or size.
• Assimilation - Older or ecological usage for uptake and incorporation of nutrients into biomass; it includes transport and may not specify ATP/NADPH-coupled biosynthetic pathways. Separation test: whether the claim is about nutrient incorporation into the organism or about named biosynthetic pathways.

1. Which of these neighbouring kinds and how to tell them apart hold for the sense of anabolism this model covers, and on what evidence? provenance