LOGOS-ETÝMON-NOMOS BIOS
Start Codon
Grapheme: AUG
- Morpheme Function: Start codon; also codes for amino acid
- Lexeme: Methionine
- Semantics: Initiates translation; defines reading frame; adds initial methionine
- Pragmatics: Also codes for methionine internally; initiation efficiency depends on surrounding sequences (Kozak/Shine–Dalgarno)
- Etymology: Conserved across all domains of life; ancient initiation signal
- ETÝMON Principle: The Capital Letter of Life — the point where the sentence begins
Stop Codons
UAA
- Morpheme Function: Stop codon
- Lexeme: Ochre stop
- Semantics: Signals termination of translation
- Pragmatics: Frequency varies; high efficiency in most organisms
- Etymology: Evolved to prevent readthrough errors
- ETÝMON Principle: The Period — unambiguous closure
UAG
- Morpheme Function: Stop codon
- Lexeme: Amber stop
- Semantics: Terminates translation; sometimes reassigned for synthetic amino acids
- Pragmatics: Rare in some genomes; flexible in engineered systems
- Etymology: Named “amber” after researcher Harris Bernstein (German for “amber”)
- ETÝMON Principle: The Conditional Stop — finality with adaptability
UGA
- Morpheme Function: Stop codon; contextually selenocysteine codon
- Lexeme: Opal stop / Selenocysteine
- Semantics: Default stop; inserts selenocysteine if SECIS present
- Pragmatics: Dual semantic capacity depending on structural signals
- Etymology: Adaptive punctuation; evolutionary addition of a 21st amino acid
- ETÝMON Principle: The Semantic Switchpoint — stop or meaning expansion
Phenylalanine (Phe)
UUU
- Function: Amino acid codon
- Semantics: Codes for Phe; aromatic, hydrophobic
- Pragmatics: Usage bias affects translation speed
- Etymology: Ancient aromatic assignment
- ETÝMON: Fragrance of Form — structural aromatic unit
UUC — Same as UUU; preferred in some species due to tRNA abundance
Leucine (Leu)
UUA, UUG, CUU, CUC, CUA, CUG
- Semantics: Hydrophobic branched-chain amino acid
- Pragmatics: CUG is dominant in many genomes; some codons rare
- Etymology: Among earliest amino acids in code; structural core in proteins
- ETÝMON: The Framework Beam — backbone component
Isoleucine (Ile)
AUU, AUC, AUA
- Semantics: Hydrophobic, branched-chain amino acid
- Pragmatics: AUA rare in bacteria; may require modified tRNA
- Etymology: Derived from leucine in biosynthetic pathway
- ETÝMON: The Forked Path — variation of structure
Valine (Val)
GUU, GUC, GUA, GUG
- Semantics: Small hydrophobic; stabilizes protein cores
- Pragmatics: Codon usage reflects GC content
- Etymology: Early incorporation into genetic code
- ETÝMON: The Compact Pillar — tight structural support
Serine (Ser)
UCU, UCC, UCA, UCG, AGU, AGC
- Semantics: Polar uncharged; common in active sites
- Pragmatics: Two disjoint codon sets; allows flexibility in translation
- Etymology: Highly mutable codon family without loss of meaning
- ETÝMON: The Connector — forms hydrogen bonds, links structures
Proline (Pro)
CCU, CCC, CCA, CCG
- Semantics: Cyclic structure; imposes bends in chains
- Pragmatics: CCG rare in some genomes
- Etymology: Structural breaker, shaping protein folds
- ETÝMON: The Hinge — forces turns in the sentence of life
Threonine (Thr)
ACU, ACC, ACA, ACG
- Semantics: Polar uncharged; hydroxyl group for modification
- Pragmatics: Codon choice influences post-translational modification sites
- Etymology: Biochemically versatile residue
- ETÝMON: The Editable Word — site for later chemical annotations
Alanine (Ala)
GCU, GCC, GCA, GCG
- Semantics: Small, nonpolar; versatile structural filler
- Pragmatics: GC-rich codons favored in high-GC genomes
- Etymology: Simple residue; possibly early in code evolution
- ETÝMON: The Builder’s Brick — small, reliable, everywhere
Tyrosine (Tyr)
UAU, UAC
- Semantics: Aromatic; hydroxyl for phosphorylation
- Pragmatics: Important in signaling pathways
- Etymology: Likely later aromatic addition
- ETÝMON: The Signal Lamp — dual hydrophobic/polar nature
Histidine (His)
CAU, CAC
- Semantics: Positively charged at physiological pH; active site catalyst
- Pragmatics: Conserved in enzyme binding pockets
- Etymology: Essential in acid–base catalysis since early enzymes
- ETÝMON: The Gatekeeper — controls flow of protons and reactions
Glutamine (Gln)
CAA, CAG
- Semantics: Polar uncharged; amide side chain
- Pragmatics: CAG expansions cause certain genetic disorders
- Etymology: Biochemical derivative of glutamate
- ETÝMON: The Conditional Linker — connects but can misfire
Asparagine (Asn)
AAU, AAC
- Semantics: Polar uncharged; amide donor/acceptor
- Pragmatics: Glycosylation sites (N-X-S/T motif)
- Etymology: Biochemically linked to aspartic acid
- ETÝMON: The Sugar Anchor — point of attachment for carbohydrates
Lysine (Lys)
AAA, AAG
- Semantics: Positively charged; interacts with DNA/RNA
- Pragmatics: Abundant in nuclear proteins
- Etymology: Basic residue; key in early nucleic acid binding
- ETÝMON: The Binding Word — attaches to the text of life
Aspartic Acid (Asp)
GAU, GAC
- Semantics: Negatively charged; involved in catalysis
- Pragmatics: Often found in enzyme active sites
- Etymology: Early acid in metabolism
- ETÝMON: The Acidic Mark — reactive punctuation
Glutamic Acid (Glu)
GAA, GAG
- Semantics: Negatively charged; neurotransmitter role
- Pragmatics: C-terminal amidation sites in peptides
- Etymology: Linked to core metabolic cycles early on
- ETÝMON: The Long Acid — extended reactive phrase
Cysteine (Cys)
UGU, UGC
- Semantics: Sulfur-containing; forms disulfide bonds
- Pragmatics: Stabilizes protein structures
- Etymology: Essential for oxidative folding
- ETÝMON: The Lock — forms interchain links
Tryptophan (Trp)
UGG
- Semantics: Largest aromatic; precursor for serotonin
- Pragmatics: Rare codon; low abundance tRNA
- Etymology: Added late; complex biosynthesis
- ETÝMON: The Rare Word — costly but potent in meaning
Arginine (Arg)
CGU, CGC, CGA, CGG, AGA, AGG
- Semantics: Positively charged; binds nucleic acids
- Pragmatics: Codon usage bias extreme in some organisms; AGA/AGG rare in E. coli
- Etymology: Basic residue; key in DNA–protein interaction since early life
- ETÝMON: The Keyholder — opens access to genetic information
Glycine (Gly)
GGU, GGC, GGA, GGG
- Semantics: Smallest amino acid; flexible
- Pragmatics: Allows tight turns in proteins
- Etymology: Simple structure; likely ancient
- ETÝMON: The Space Saver — allows folding without bulk
Amino Acid Single-Letter Codes – SolveForce Communications