Mineral enzyme cofactor overview

Category: biosynthesis

Overview

Essential trace minerals serve as obligate enzyme cofactors throughout metabolism. Mg²⁺ — ATP-Mg complex obligate for all kinases + Na/K-ATPase; >300 enzymes. Zn²⁺ — alcohol dehydrogenase + carbonic anhydrase + carboxypeptidase + zinc-finger TFs (e.g. steroid hormone receptors). Cu — cytochrome c oxidase + superoxide dismutase + tyrosinase + lysyl oxidase + dopamine β-hydroxylase. Mn — Mn-SOD (mitochondrial) + arginase + glutamine synthetase. Mo — xanthine oxidase + sulfite oxidase + aldehyde oxidase. Se — glutathione peroxidase + thioredoxin reductase + thyroid deiodinases (DIO1-3 — cross-link: hpt_axis); selenocysteine is the 21st amino acid. Cr³⁺ — disputed; chromium-binding protein "chromodulin" possibly amplifies insulin signaling, but human deficiency cases are essentially nil. I — thyroid hormone synthesis (cross-link: hpt_axis).

Organ Systems

• endocrine
• musculoskeletal
• nervous

Pathway Steps

1. mineral-uptake → enzyme-cofactor-incorporation — via dietary or supplemental Zn/Cu/Mn/Mo/Se → tissue distribution → enzyme active-site binding. Trace minerals act largely as enzyme cofactors: zinc in hundreds of metalloenzymes and zinc-finger factors, iron in heme/Fe-S proteins, copper in oxidases, selenium in selenoproteins (GPx). Regulated uptake and chaperoned incorporation supply catalytic centers while preventing free-ion toxicity — which is why deficiency impairs many enzymes at once.

Known Modulators

• magnesium (cofactor) — ATP + kinase + Na/K-ATPase. elemental Mg; most common Mg-containing supplements; 300+ enzyme cofactor; deficiency → muscle cramps + arrhythmia + insulin resistance
• magnesium citrate (cofactor) — ATP-Mg complex (citrate form, GI laxative effect). high bioavailability + osmotic laxative; preferred form when constipation is also addressed
• magnesium glycinate (cofactor) — ATP-Mg complex (glycinate chelate). gentle GI tolerance; common form for sleep + relaxation claims
• magnesium l threonate (cofactor) — CNS-targeted Mg delivery (MIT/Magtein). Stanford-developed; claimed CNS penetration superior to other Mg forms; cognitive + sleep marketing
• magnesium malate (cofactor) — ATP-Mg (malate as Krebs intermediate). malate form; fibromyalgia + chronic fatigue marketing; less GI than oxide
• magnesium taurate (cofactor) — ATP-Mg + taurine co-delivery. taurine + Mg combo; cardiovascular claims
• magnesium orotate (cofactor) — ATP-Mg + orotate (pyrimidine precursor). orotate form; sports + cardiac claims
• magnesium chloride (cofactor) — ATP-Mg. magnesium chloride; topical/transdermal use; oral form is well-absorbed
• magnesium bhb (substrate) — BHB ketone delivery + Mg cofactor. BHB salt with Mg counterion; cross-link: ketone_body_synthesis
• zinc (cofactor) — metalloenzymes + zinc-finger TFs. ~300 enzymes; immune + wound healing; deficiency → taste/smell loss + immune compromise
• zinc picolinate (cofactor) — Zn delivery (picolinate chelate). well-absorbed Zn form; immune support marketing
• zinc citrate (cofactor) — Zn delivery (citrate). mid-tier absorption; commonly available
• zinc gluconate (cofactor) — Zn delivery (gluconate). common OTC; cold-duration shortening claims for lozenges (older meta-analyses)
• zinc acetate (cofactor) — Zn delivery (acetate, ionic dissociation). preferred form for cold-lozenge studies; high free-ion availability
• copper (cofactor) — Cu enzymes (CCO, SOD1, tyrosinase, DBH, lysyl oxidase). rarely deficient in Western diets; high Zn supplementation can induce Cu deficiency over months
• manganese (cofactor) — Mn-SOD + arginase + glutamine synthetase. rarely deficient; toxicity (manganism) more often the clinical issue (welders + chronic occupational exposure)
• molybdenum (cofactor) — xanthine oxidase + sulfite oxidase + aldehyde oxidase. genuine deficiency essentially unknown in non-experimental settings; supplementation rarely indicated
• selenium (cofactor) — GPx + thioredoxin reductase + DIO deiodinases. selenoprotein cofactor; thyroid + antioxidant; toxicity at >400 µg/d (selenosis: nail/hair loss)
• selenium methionine (cofactor) — organic Se source (better bioavailability). organic selenium form; preferred over selenate/selenite for chronic supplementation
• chromium (activator) — putative insulin sensitizer (mechanism debated). Cr³⁺; disputed nutrient status; clinically meaningful deficiency essentially unproven
• boron (cofactor) — bone health + hormone modulation (mechanism unclear). trace mineral; modest effects on T + estradiol levels in supplementation trials
• iodine (substrate) — thyroid hormone synthesis. thyroid hormone substrate; cross-link: hpt_axis; deficiency → goiter + cretinism (historically)
• iodine potassium iodide (substrate) — thyroid hormone synthesis + radiation protection. KI form; thyroid-blocking dose 130 mg for radioiodine exposure prophylaxis
• sodium bicarbonate (cofactor) — systemic alkalinization. oral or IV bicarbonate; metabolic acidosis correction + sodium-channel-blocker toxicity rescue
• potassium chloride (cofactor) — K replacement. oral KCl for hypokalemia; ECG monitoring at high doses + renal failure
• sodium chloride (substrate) — osmolyte / electrolyte. NaCl; IV saline + oral salt; restriction in HTN
• calcium (substrate) — bone + signaling Ca²⁺ pool. elemental Ca²⁺; bone + secretion + muscle; cross-link: calcium_phosphate_pth_axis
• calcium carbonate (substrate) — Ca + antacid. highest %Ca by weight; antacid + bone-supplement common form; requires acid for absorption (PPI DDI)
• iron (substrate) — hemoglobin + cytochromes + enzymes. elemental Fe; cross-link: iron_metabolism; ferrous forms (sulfate/gluconate) better absorbed than ferric
• iron bisglycinate (substrate) — Fe (bisglycinate chelate). gentler GI tolerance than ferrous sulfate; chelate form bypasses some absorption competition
• lithium orotate (inhibitor) — low-dose Li (mood / IP3 cycle). OTC supplement form (5-20 mg elemental Li); cross-link: inositol_phosphate_signaling for prescription lithium
• shilajit (activator) — fulvic-acid + mineral complex (humic substance). Himalayan resin; testosterone + energy claims; trace mineral + fulvic acid mix
• potassium (cofactor) — major intracellular cation. essential electrolyte; Na/K-ATPase + membrane potential; renal regulation

References

• PMID 39788322