Protein Modification Ontology (MOD)

Name: Protein Modification Ontology (MOD)
Published: 2026-11-13T13:50:45.374984Z

Selected English labels and exact synonyms from the Protein Modification Ontology (MOD), retrieved 2026-11-07, with source identifiers and spelling preserved. Licensed CC BY 4.0; full attribution is listed under Sources. Under semantic review; not endorsed by the ontology's maintainers.

Curator: Oliver Bennett

Languages shown reflect this page; source translations may cover only some concepts.

English
4-toluenesulfonylUnrated 4-toluenesulphonylUnrated TosUnrated TosylUnrated
5'-(6'-tryptophyl)-tyrosin-3'-yl-methionin-S-iumUnrated S-[5'-(L-tryptoph-6'-yl)-L-tyrosin-3'-yl]-L-methionin-S-iumUnrated
(4-methylpiperazin-1-yl)acetylUnrated iTRAQ8plex-118 reporter+balance reagent acylated N-terminalUnrated
ADPRibCysUnrated MOD_RES ADP-ribosylcysteineUnrated (R)-2-amino-3-([adenosine 5'-(trihydrogen diphosphate) 5'->5'-ester with alpha-D-ribofuranosyl]sulfanyl)propanoic acidUnrated S-(ADP-ribosyl)-L-cysteineUnrated S-(ADP-ribosyl)- (on Cysteine)Unrated S-alpha-D-ribofuranosyl-L-cysteine 5'->5'-ester with adenosine 5'-(trihydrogen diphosphate)Unrated S-L-cysteine alpha-D-ribofuranoside 5'->5'-ester with adenosine 5'-(trihydrogen diphosphate)Unrated
MeLeuUnrated N-methylated leucineUnrated
GlcResUnrated monoglucosylated residueUnrated
2-(4-amino-3-oxo-isothiazolidin-2-yl)-3-phenylpropanoic acidUnrated (2S)-2-[(4R)-4-amino-3-oxo-1,2-thiazolidin-2-yl]-3-phenylpropanoic acidUnrated 4-amino-3-isothiazolidinone-L-phenylalanineUnrated CROSSLNK N,N-(cysteine-1,S-diyl)phenylalanine (Cys-Phe)Unrated cysteinyl phenylalanine sulfenamideUnrated N,N-(L-cysteine-1,S-diyl)-L-phenylalanineUnrated phenylalanine-cysteine sulfenyl amide cross-linkUnrated phenylalanine-cysteine sulphenyl amide cross-linkUnrated
dMe3N6Me3+LysUnrated N6,N6,N6-trimethyl-L-lysine with neutral loss of trimethylamineUnrated
crosslinked D-asparagine residueUnrated XlnkDAsnUnrated
HalHisUnrated halogenated histidineUnrated
(4-methylpiperazin-1-yl)acetylUnrated iTRAQ4plex-117 reporter+balance reagent N'-acylated histidineUnrated
L-isoglutamyl diglutamic acidUnrated
2-(L-cystein-S-yl)-methionineUnrated (2R)-2-amino-2-([2-amino-2-carboxyethyl]sulfanyl)-4-(methylsulfanyl)butanoic acidUnrated CROSSLNK 2-(S-cysteinyl)-methionine (Cys-Met)Unrated
2-amino-3-(methyldisulfanediyl)propanoic acidUnrated 2-amino-3-methyldisulfanylpropanoic acidUnrated 2-amino-3-(methyldithio)propanoic acidUnrated 2-azanyl-3-(methyldisulfanediyl)-propanoic acidUnrated (2R)-2-amino-3-(methyldisulfanediyl)propanoic acidUnrated L-3-(methyldithio)alanineUnrated L-cysteine methyl disulfideUnrated methyl methanethiolsulfonate derivatized cysteineUnrated methyl methanethiosulfonate derivatized cysteineUnrated mmtsUnrated MOD_RES Cysteine methyl disulfideUnrated S-methylthiocysteineUnrated S-methylthio-L-cysteineUnrated
ModResUnrated protein modificationUnrated
dioxoindolealanine lactoneUnrated
fluorescein-5-thiosemicarbazide - site SUnrated
modified residue that can arise from different natural residuesUnrated
(2S)-2-amino-3-(4-bromophenyl)propanoic acidUnrated 4'BrPheUnrated L-4'-bromophenylalanineUnrated para-bromophenylalanineUnrated p-bromophenylalanineUnrated
2-carbamic-propanoic acidUnrated N-carboxy-L-valineUnrated N-carboxymethionineUnrated (S)-2-carboxyamino-propanoic acidUnrated
2-(4-guanidinobutanoyl)-5-hydroxy-1H-imidazole-4-carbothioic O-acidUnrated 2-(4-guanidinobutanoyl)-5-hydroxy-4-thioformyl-1H-imidazole [tautomer]Unrated 2-(4-guanidinobutanoyl)-5-hydroxyimidazole-4-carbothionic acidUnrated (4Z)-2-(4-guanidinobutanoyl)-5-oxo-4-(sulfanylmethylidene)-4,5-dihydro-1H-imidazoleUnrated CROSSLNK 2-(4-guanidinobutanoyl)-5-hydroxyimidazole-4-carbothionic acid (Arg-Cys)Unrated
15,16-DhbvUnrated 15,16-dihydrobiliverdin-bis-L-cysteineUnrated 15,16-dihydrobiliverdin cysteine adductUnrated 15,16-dihydrobiliverdin IXalphaUnrated (16R)-8,12-bis(2-carboxyethyl)-3-[2-(((2R)-2-amino-2-carboxy)ethylsulfanyl)ethyl]-18-[(1Xi)-1-(((2R)-2-amino-2-carboxy)ethylsulfanyl)ethyl]-2,7,13,17-tetramethyl-15,16-dihydrobilin-1,19(21H,24H)-dioneUnrated 3'',18'-biscysteinyl-15,16-dihydrobiliverdinUnrated 3beta,18alpha-biscysteinyl-15,16-dihydrobiliverdinUnrated 8,12-bis(2-carboxyethyl)-3-(2-(cysteinyl-S)-ethyl)-18-(1-(cysteinyl-S)-ethyl)-2,7,13,17-tetramethylbiladiene-ab-1,19(16H,21H)-dioneUnrated BINDING 15,16-dihydrobiliverdin (covalent; via 2 links)Unrated DBVUnrated
(2S)-2-amino-3-hydroxypropanamideUnrated amidated L-serineUnrated L-serine amideUnrated MOD_RES Serine amideUnrated serinamideUnrated SerNUnrated
(2S)-2,6-diaminohexanamideUnrated amidated L-lysineUnrated L-lysine amideUnrated lysinamideUnrated LysNUnrated MOD_RES Lysine amideUnrated
(hexadecanamido)acetic acidUnrated (hexadecanoylamino)acetic acidUnrated (hexadecanoylamino)ethanoic acidUnrated LIPID N-palmitoyl glycineUnrated N-(1-oxohexadecyl)glycineUnrated N-hexadecanoylated glycineUnrated N-palmitoylated glycineUnrated N-palmitoyl-glycineUnrated N-palmitoylglycineUnrated NPamGlyUnrated
MOD_RES N4-methyl-D-asparagineUnrated N4-methylated D-asparagineUnrated N4-methyl-D-asparagineUnrated
GalUnrated galactosylated residueUnrated
2-(L-cystein-S-yl)-L-alanineUnrated (2R)-2-amino-2-[(2R)-2-amino-2-carboxyethyl]sulfanyl-3-hydroxybutanoic acidUnrated (2R,5R)-2,5-diamino-5-methyl-4-thiahexanedioic acidUnrated alpha-(L-cystein-S-yl)-L-alanineUnrated
O-formyl-L-serineUnrated
2-(1H-imidazolyl)ethaniminiumUnrated histidine immonium ionUnrated
glycosylphosphatidylinositolated residueUnrated GPIResUnrated LIPID GPI-anchor amidated carboxyl endUnrated
CARBOHYD O-linked (Glc) hydroxylysineUnrated (D-glucopyranosyl)oxy-L-lysineUnrated O-glucosyl-L-hydroxylysineUnrated
(2S,5S)-5-hydroxypyrrolidine-2-carboxylic acidUnrated 5-hydroxy-L-prolineUnrated
alpha-amino 3x(13)C-labeled propanoylated residueUnrated
(2S)-2-hydroxy-3-phenylpropanoic acidUnrated L-3-phenyllactic acidUnrated MOD_RES 3-phenyllactic acidUnrated
S(O)ResUnrated sulfur substitution for oxygenUnrated
PentUnrated Pentoses (Ara, Rib, Xyl)Unrated PentosylUnrated pentosylated residueUnrated
N-palmitoleylated residueUnrated
2-amino-3-(2-aminoethyl)sulfanyl-3-methylbutanoic acidUnrated S-(2-aminoethyl)-3-methylcysteine (Thr)Unrated S-aminoethyl-3-methylcysteineUnrated
GlcNAcResUnrated mono-N-acetylaminoglucosylated residueUnrated
Carboxymethyl LysylUnrated N6-carboxymethyl-L-lysineUnrated
L-methionine (S)-sulfoxideUnrated MOD_RES Methionine (S)-sulfoxideUnrated S-MetOUnrated
reporter fragmentUnrated
8-benzyl-2-(4-hydroxybenzyl)-6-(4-hydroxyphenyl)imidazo[1,2-a]pyrazin-3(7H)-oneUnrated coelenterazineUnrated Oplophorus luciferinUnrated
(2S)-2-amino-4-(2-aminophenyl)-4-oxo-butanoic acidUnrated kynureninwUnrated L-kynurenineUnrated
fluorinated residueUnrated FluorophenylalanylUnrated FResUnrated
4x(15)N labeled L-arginineUnrated
2,6-dimethyl-1-methylidenepiperidiniumUnrated cysTMT6plex-129 reporter fragmentUnrated TMT6plex-129 reporter fragmentUnrated
sumoylated lysineUnrated
deamidated residueUnrated deamidationkqUnrated Deamidation of Asparagine and Glutamine to Aspartate and GlutamateUnrated dNResUnrated
EAPTA d0Unrated
tris-L-cysteinyl L-glutamato tetrairon tetrasulfideUnrated tris-mu3-sulfido-tris(cysteinato)-1kappaS,2kappaS,3kappaS-glutamato-4kappaO(5),4kappaO(5')-tetraironUnrated
CMeResUnrated C-methylated residueUnrated
Levuglandinyl - arginine hydroxylactam adductUnrated
(4-methylpiperazin-1-yl)acetylUnrated iTRAQ8plex-113 reporter+balance reagent O3-acylated threonineUnrated
monosodium L-aspartateUnrated Na1AspUnrated
3-methyl-S-(2-sulfanylethyl)cysteine (Thr)Unrated beta-methyl-S-(2-mercaptoethyl)cysteineUnrated
cysTMT6plex-129 reporter+balance reagent cysteine disulfideUnrated S-(2-{3-[2-(2,6-dimethylpiperidin-1-yl)acetamido]propanamido}ethyl)sulfanylUnrated
adenosine diphosphoribosyl (ADP-ribosyl) modified residueUnrated ADPRibResUnrated
(2S,3R)-3-(acetyloxy)-2-aminobutanoic acidUnrated ACT_SITE O-acetylthreonine intermediateUnrated MOD_RES O-acetylthreonineUnrated O-acetyl-L-threonineUnrated O-acetylthreonineUnrated OAcThrUnrated threonine acetate esterUnrated
GPICysUnrated LIPID GPI-anchor amidated cysteineUnrated N-cysteinyl-glycosylphosphatidylinositolethanolamineUnrated
4-methyl-1-methylidenepiperazin-1-iumUnrated iTRAQ4plex-117, mTRAQ heavy, reporter fragmentUnrated
Hex1HexNAc2dHex1Pent1 N4-glycosylated asparagineUnrated
6x(13)C labeled L-leucineUnrated
3',3'',5',5''-tetraiodo-L-thyronineUnrated 3,3',5,5'-tetraiodo-L-thyronineUnrated 3,5,3',5'-tetraiodo-L-thyronineUnrated 4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodo-L-phenylalanineUnrated I4ThyUnrated L-thyroxineUnrated MOD_RES ThyroxineUnrated O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-L-tyrosineUnrated (S)-2-amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]propanoic acidUnrated T4Unrated
3-[(2,6-dimethylpiperidin-1-yl)acetyl]amino)propanoylUnrated TMT6plex-131 reporter+balance reagent O4'-acylated tyrosineUnrated
2-nitrobenzoylUnrated NBzUnrated
2,4-dinitrophenyl modified residueUnrated DnpUnrated
2-amino-3-hydroxybutanoic acid 3-phosphateUnrated 2-azanyl-3-(phosphonooxy)butanoic acidUnrated (2S,3R)-2-amino-3-(phosphonooxy)butanoic acidUnrated MOD_RES PhosphothreonineUnrated O3-phosphothreonineUnrated O-phospho-L-threonineUnrated O-phosphorylated L-threonineUnrated OPThrUnrated phosphorylationtUnrated Phospho ThreonylUnrated threonine phosphate esterUnrated
t-butyl ester (OtBu) and t-butyl (tBu)Unrated
6x(13)C,1x(15)N labeled L-leucineUnrated
1'-methyl-L-histidineUnrated MOD_RES Tele-methylhistidineUnrated N(epsilon)-methylhistidineUnrated N(tau)-methylhistidineUnrated NteleMeHisUnrated (S)-2-amino-3-(1-methyl-1H-imidazol-4-yl)propanoic acidUnrated tele-methylated L-histidineUnrated tele-methylhistidineUnrated
brominated tyrosineUnrated BrTyrUnrated
molybdopterin guanine dinucleotideUnrated
(2S)-2-amino-5-[(2S)-2-amino-2-carboxyethoxy]-5-oxopentanoic acidUnrated O3-(isoglutamyl)-serineUnrated O(beta)-(gamma-glutamyl)serineUnrated O-(L-isoglutamyl)-L-serineUnrated O-(L-isoglutamyl)-L-serine (Gln-Ser)Unrated
(2S)-2-amino-5-([(1S,2R)-1-amino-1-carboxypropan-2-yl]oxy)-5-oxopentanoic acidUnrated (2S,3R)-2-amino-3-([(4S)-4-amino-4-carboxybutanoyl]oxy)-propanoic acidUnrated 5-(threon-O3-yl)glutamateUnrated O3-(isoglutamyl)threonineUnrated O(beta)-(gamma-glutamyl)threonineUnrated O-(L-isoglutamyl)-L-threonineUnrated O-(L-isoglutamyl)-L-threonine (active site intermediate)Unrated
dimethoxybenzyl TrpUnrated
(2S)-2-amino-3-([(2S)-2-amino-3-phenylpropanoyl]oxy)propanoic acidUnrated CROSSLNK Phenylalanyl serine ester (Ser-Phe)Unrated O-(2-amino-3-phenylpropanoyl)serineUnrated O-(L-phenylalanyl)-L-serineUnrated phenylalanine serine esterUnrated XLNK1PheOSerUnrated
(2S,3R,16R)-3,18-bis-[(R)-1-(((2R)-2-amino-2-carboxy)ethylsulfanyl)ethyl]-8,12-bis(2-carboxyethyl)-2,7,13,17-tetramethyl-2,3,15,16-tetrahydrobilin-1,19(21H,22H,24H)-dioneUnrated 3,18-bis-[1-((2-amino-2-carboxy)ethylsulfanyl)ethyl]-2,3,15,16-tetrahydro-2,7,13,17-tetramethyl-1,19-dioxo-(21H,22H,24H)-biladiene-ab-8,12-dipropanoic acidUnrated BINDING Phycoerythrobilin chromophore (covalent; via 2 links)Unrated PEBUnrated phycoerythrobilin biscysteine adductUnrated phycoerythrobilin-bis-L-cysteineUnrated
isotope tagged reagent acylated residueUnrated
6-hydroxy-L-tryptophanUnrated (S)-2-Amino-3-(4-hydroxy-1H-indol-3-yl)propanoic acidUnrated
TetrapyrResUnrated tetrapyrrole modified residueUnrated
2-amino-N5-methylpentanediamic acidUnrated (2S)-2-amino-5-methylamino-5-oxopentanoic acidUnrated gamma-methylglutamineUnrated MOD_RES N5-methylglutamineUnrated N5Me1GlnUnrated N5-methylated L-glutamineUnrated N5-methyl-L-glutamineUnrated N(delta)-methylglutamineUnrated N-methylglutamineUnrated
N-methylated methionineUnrated
2-amino-3-oxopropionic acidUnrated formylglycine (from serine)Unrated L-3-oxoalanineUnrated L-3-oxoalanine (Ser)Unrated L-aminomalonaldehydic acidUnrated L-amino-malonic acid semialdehydeUnrated MOD_RES 3-oxoalanine (Ser)Unrated (S)-2-amino-3-oxopropanoic acidUnrated
3-[(2,6-dimethylpiperidin-1-yl)acetyl]amino)propanoylUnrated TMT6plex-129 reporter+balance reagent O3-acylated threonineUnrated
O3-L-threonine 5'-DNA phosphodiesterUnrated O3-(phospho-5'-DNA)-L-threonineUnrated O-(phospho-5'-DNA)-L-threonineUnrated (S)-2-amino-3-(5'-deoxyribonucleic acid phosphonoxy)butanoic acidUnrated
3-[(2,6-dimethylpiperidin-1-yl)acetyl]amino)propanoylUnrated TMT6plex-127 reporter+balance reagent O4'-acylated tyrosineUnrated
2-acetylamino-3-hydroxybutanoic acidUnrated 2-acetylazanyl-3-hydroxybutanoic acidUnrated (2S,3R)-2-acetamido-3-hydroxybutanoic acidUnrated MOD_RES N-acetylthreonineUnrated N-acetylated L-threonineUnrated N-acetyl-L-threonineUnrated N-acetylthreonineUnrated NAcThrUnrated N-methylcarbonylthreonineUnrated
Hex2HexNAc2dHex1 N4-glycosylated asparagineUnrated
3-[(2,6-dimethylpiperidin-1-yl)acetyl]amino)propanoylUnrated TMT6plex-126 reporter+balance reagent acylated N-terminalUnrated
triphenylmethylUnrated TritylUnrated TrtUnrated
halogenated residueUnrated halogen containing residueUnrated HalResUnrated
(2S)-2-amino-3-(1H-indol-3-yl)propanamideUnrated amidated L-tryptophanUnrated L-tryptophan amideUnrated MOD_RES Tryptophan amideUnrated TrpNUnrated tryptophanamideUnrated
O-[4-(2-aminoethyl)benzenesulfonyl] serineUnrated
(2R)-2-amino-3-(2-acetamido-2-deoxy-beta-D-glucopyranosylsulfanyl)propanoic acidUnrated CARBOHYD S-linked (GlcNAc) cysteineUnrated S-[beta-D-(N-acetylamino)glucopyranosyl]cysteineUnrated S-(N-acetylamino)glucosyl-L-cysteineUnrated S-[(N-acetylamino)glycosyl]cysteineUnrated
Levuglandinyl - arginine lactam adductUnrated
Hexadecanoylated L-cysteineUnrated palmitoylated-L-cysteineUnrated palmitoylationcUnrated PamCysUnrated
EDT-maleimide-PEO-biotinUnrated
(2S)-2-amino-6-([(2S,3R)-2-amino-3-hydroxybutanoyl]amino)hexanoic acidUnrated N6-(L-threonyl)-L-lysineUnrated N6-threonyl-lysineUnrated

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