Modified residues excluding lipids and glycans.
| PTM Type | Description | Target Amino Acid | PTM Information |
| Acetylation | N-acetylglycine | Glycine (G) | |
| Acetylation | N-acetylalanine | Alanine (A) | |
| Acetylation | N-acetylthreonine | Threonine (T) | |
| Acetylation | N-acetylserine | Serine (S) | |
| Acetylation | N-acetylproline | Proline (P) | |
| Acetylation | N-acetylmethionine | Methionine (M) | |
| Acetylation | N6-acetyllysine | Lysine (K) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Amidation | Alanine amide | Alanine (A) | |
| Amidation | Arginine amide | Arginine (R) | |
| Amidation | Asparagine amide | Asparagine (N) | |
| Amidation | Cysteine amide | Cysteine (C) | |
| Amidation | Glycine amide | Glycine (G) | |
| Amidation | Isoleucine amide | Isoleucine (I) | |
| Amidation | Leucine amide | Leucine (L) | |
| Amidation | Phenylalanine amide | Phenylalanine (F) | |
| Amidation | Tryptophan amide | Tryptophan (W) | |
| Amidation | Valine amide | Valine (V) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Carboxylation | N6-carboxylysine | Lysine (K) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Citrullination | Citrulline | Arginine (R) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Crotonylation | N6-crotonyllysine | Lysine (K) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Formylation | N-formylmethionine | Methionine (M) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Gamma-carboxyglutamic_acid | 4-carboxyglutamate | Glutamate (Q) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Glutathionylation | S-glutathionyl cysteine | Cysteine (C) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Hydroxylation | 5-hydroxylysine | Lysine (K) | |
| Hydroxylation | 4-hydroxyproline | Proline (P) | |
| Hydroxylation | Hydroxyproline | Proline (P) | |
| Hydroxylation | 2,3-didehydroalanine (Ser) | Serine (S) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Lipoylation | N6-lipoyllysine | Lysine (K) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Malonylation | N6-malonyllysine | Lysine (K) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Methylation | N6-methyllysine | Lysine (K) | |
| Methylation | Asymmetric dimethylarginine | Arginine (R) | |
| Methylation | N6-methylated lysine | Lysine (K) | |
| Methylation | N6,N6-dimethyllysine | Lysine (K) | |
| Methylation | N6,N6,N6-trimethyllysine | Lysine (K) | |
| Methylation | N5-methylglutamine | Glutamine (Q) | |
| Methylation | Cysteine methyl ester | Cysteine (C) | |
| Methylation | Symmetric dimethylarginine | Arginine (R) | |
| Methylation | Omega-N-methylated arginine | Arginine (R) | |
| Methylation | Omega-N-methylarginine | Arginine (R) | |
| Methylation | N2,N2-dimethylarginine | Arginine (R) | |
| Methylation | 5-methylarginine | Arginine (R) | |
| Methylation | 3-methylthioaspartic acid | Aspartate (D) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Nitration | Nitrated tyrosine | Tyrosine (Y) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Other | N6-(pyridoxal phosphate)lysine | Lysine (K) | |
| Other | N6-(retinylidene)lysine | Lysine (K) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Oxidation | Methionine sulfone | Methionine (M) | |
| Oxidation | Methionine sulfoxide | Methionine (M) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Phosphorylation | Phosphohistidine | Histidine (H) | |
| Phosphorylation | Phosphotyrosine | Tyrosine (Y) | |
| Phosphorylation | Phosphothreonine | Threonine (T) | |
| Phosphorylation | Phosphoserine | Serine (S) | |
| Phosphorylation | O-(pantetheine 4'-phosphoryl)serine | Serine (S) | |
| Phosphorylation | 4-aspartylphosphate | Aspartate (D) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Pyrrolidone_carboxylic_acid | Pyrrolidone carboxylic acid | Glutamine (Q) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Pyrrolylation | S-(dipyrrolylmethanemethyl)cysteine | Cysteine (C) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Pyruvate | 2-(S-cysteinyl)pyruvic acid O-phosphothioketal | Cysteine (C) | |
| Pyruvate | Pyruvic acid (Ser) | Serine (S) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| S-nitrosylation | S-nitrosocysteine | Cysteine (C) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Succinylation | N6-succinyllysine | Lysine (K) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Sulfation | Sulfotyrosine | Tyrosine (Y) |
Covalently attached glycan group(s).
| PTM Type | Description | Target Amino Acid | PTM Information |
| C-linked_Glycosylation | C-linked (Man) | Tryptophan (W) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| N-linked_Glycosylation | N-linked (GlcNAc) | Asparagine (N) | |
| N-linked_Glycosylation | N-linked (GlcNAc) (complex) alternate | Asparagine (N) | |
| N-linked_Glycosylation | N-linked (Man) | Asparagine (N) | |
| N-linked_Glycosylation | N-linked (GlcNAc) (polylactosaminoglycan) | Asparagine (N) | |
| N-linked_Glycosylation | N-linked (GlcNAc) (keratan sulfate) | Asparagine (N) | |
| N-linked_Glycosylation | N-linked (GlcNAc) in isoform Secreted | Asparagine (N) | |
| N-linked_Glycosylation | N-linked (Glc) (glycation) in PHF-tau in vitro | Asparagine (N) | |
| N-linked_Glycosylation | N-linked (GlcNAc) (hybrid) | Asparagine (N) | |
| N-linked_Glycosylation | N-linked (GlcNAc) (high mannose) | Asparagine (N) | |
| N-linked_Glycosylation | N-linked (GlcNAc) atypical | Asparagine (N) | |
| N-linked_Glycosylation | N-linked (GlcNAc) by host | Asparagine (N) | |
| N-linked_Glycosylation | N-linked (Glc) (glycation) | Asparagine (N) | |
| N-linked_Glycosylation | N-linked (Glc) | Asparagine (N) | |
| N-linked_Glycosylation | N-linked (GlcNAc) (complex) | Asparagine (N) | |
| N-linked_Glycosylation | N-linked (GlcNAc) partial | Asparagine (N) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| O-linked_Glycosylation | O-linked (GlcNAc) alternate | Serine (S) | |
| O-linked_Glycosylation | O-linked (GalNAc) by host | Serine (S) | |
| O-linked_Glycosylation | O-linked (Gal) partial | Serine (S) | |
| O-linked_Glycosylation | O-linked (GlcNAc) | Threonine (T) | |
| O-linked_Glycosylation | O-linked (GalNAc) | Threonine (T) | |
| O-linked_Glycosylation | O-linked (Man) | Threonine (T) | |
| O-linked_Glycosylation | O-linked (GalNAc) partial | Serine (S) | |
| O-linked_Glycosylation | O-linked (GalNAc) partial | Threonine (T) | |
| O-linked_Glycosylation | O-linked (Fuc) | Threonine (T) | |
| O-linked_Glycosylation | O-linked (Xyl) (chondroitin sulfate) | Threonine (T) | |
| O-linked_Glycosylation | O-linked (HexNAc) | Threonine (T) | |
| O-linked_Glycosylation | O-linked (Hex) | Threonine (T) | |
| O-linked_Glycosylation | O-linked (GlcNAc) alternate | Threonine (T) | |
| O-linked_Glycosylation | O-linked (GalNAc) by host | Threonine (T) | |
| O-linked_Glycosylation | O-linked (Glc) | Tyrosine (Y) | |
| O-linked_Glycosylation | O-linked (Glc) | Serine (S) | |
| O-linked_Glycosylation | O-linked (Gal) | Lysine (K) | |
| O-linked_Glycosylation | O-linked (Gal) partial | Lysine (K) | |
| O-linked_Glycosylation | O-linked (GlcNAc) | Proline (P) | |
| O-linked_Glycosylation | O-linked (Gal) | Proline (P) | |
| O-linked_Glycosylation | O-linked (Gal) partial | Proline (P) | |
| O-linked_Glycosylation | O-linked (GlcNAc) | Serine (S) | |
| O-linked_Glycosylation | O-linked (GalNAc) | Serine (S) | |
| O-linked_Glycosylation | O-linked (Man) | Serine (S) | |
| O-linked_Glycosylation | O-linked (Fuc) | Serine (S) | |
| O-linked_Glycosylation | O-linked (Xyl) (chondroitin sulfate) | Serine (S) | |
| O-linked_Glycosylation | O-linked (HexNAc) | Serine (S) | |
| O-linked_Glycosylation | O-linked (Gal) | Serine (S) | |
| O-linked_Glycosylation | O-linked (Hex) | Serine (S) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| S-linked_Glycosylation | S-linked (Hex) | Cysteine (C) | |
| S-linked_Glycosylation | S-linked (GlcNAc) | Cysteine (C) | |
| S-linked_Glycosylation | S-linked (Glc) | Cysteine (C) | |
| S-linked_Glycosylation | S-linked (Gal) | Cysteine (C) |
Covalently attached lipid group(s).
| PTM Type | Description | Target Amino Acid | PTM Information |
| GPI-anchor | GPI-anchor amidated asparagine | Asparagine (N) | |
| GPI-anchor | GPI-anchor amidated alanine | Alanine (A) | |
| GPI-anchor | GPI-like-anchor amidated serine | Serine (S) | |
| GPI-anchor | GPI-anchor amidated serine | Serine (S) | |
| GPI-anchor | GPI-anchor amidated glycine | Glycine (G) | |
| GPI-anchor | GPI-anchor amidated aspartate | Aspartate (D) | |
| GPI-anchor | GPI-like-anchor amidated asparagine | Asparagine (N) | |
| GPI-anchor | GPI-anchor amidated cysteine | Cysteine (C) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Myristoylation | N6-myristoyl lysine | Lysine (K) | |
| Myristoylation | N-myristoyl glycine | Glycine (G) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Palmitoylation | S-farnesyl cysteine | Cysteine (C) | |
| Palmitoylation | O-palmitoyl threonine | Threonine (T) | |
| Palmitoylation | O-octanoyl serine | Serine (S) | |
| Palmitoylation | O-palmitoyl serine | Serine (S) | |
| Palmitoylation | O-palmitoleoyl serine | Serine (S) | |
| Palmitoylation | N6-palmitoyl lysine | Lysine (K) | |
| Palmitoylation | N-palmitoyl glycine | Glycine (G) | |
| Palmitoylation | S-palmitoyl cysteine | Cysteine (C) | |
| Palmitoylation | S-geranylgeranyl cysteine | Cysteine (C) | |
| Palmitoylation | N-palmitoyl cysteine | Cysteine (C) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| S-diacylglycerol | S-diacylglycerol cysteine | Cysteine (C) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Sumoylation | Sumoyllysine | Lysine (K) |
| PTM Type | Description | Target Amino Acid | PTM Information |
| Ubiquitination | Ubiquitinamethionine | Methionine (M) | |
| Ubiquitination | Ubiquitinatyrosine | Tyrosine (Y) | |
| Ubiquitination | Ubiquitinatryptophan | Tryptophan (W) | |
| Ubiquitination | Ubiquitinvaline | Valine (V) | |
| Ubiquitination | Ubiquitinathreonine | Threonine (T) | |
| Ubiquitination | Ubiquitinaserine | Serine (S) | |
| Ubiquitination | Ubiquitinarginine | Arginine (R) | |
| Ubiquitination | Ubiquitinglutamine | Glutamine (Q) | |
| Ubiquitination | Ubiquitinaproline | Proline (P) | |
| Ubiquitination | Ubiquitinasparagine | Asparagine (N) | |
| Ubiquitination | Ubiquitinalanine | Alanine (A) | |
| Ubiquitination | Ubiquitinleucine | Leucine (L) | |
| Ubiquitination | Ubiquitinlysine | Lysine (K) | |
| Ubiquitination | Ubiquitinisoleucine | Isoleucine (I) | |
| Ubiquitination | Ubiquitinhistidine | Histidine (H) | |
| Ubiquitination | Ubiquitinaglycine | Glycine (G) | |
| Ubiquitination | Ubiquitinphenylalanine | Phenylalanine (F) | |
| Ubiquitination | Ubiquitinglutamate | Glutamate (E) | |
| Ubiquitination | Ubiquitinaspartate | Aspartate (D) | |
| Ubiquitination | Ubiquitincysteine | Cysteine (C) |
