Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1075
Number of amino acids:255
Molecular Weight:27678.26 Da
Theoretical pI:6.42


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)145.49%
Cysteine CYS (C)124.71%
Glutamic Acid GLU (E)103.92%
Aspartic Acid ASP (D)155.88%
Glycine GLY (G)239.02%
Phynylalanine PHE (F)145.49%
Isoleucine ILE (I)187.06%
Histidine HIS (H)41.57%
Lysine LYS (K)114.31%
Methionine MET (M)31.18%
Leucine LEU (L)135.1%
Asparagine ASN (N)145.49%
Glutamine GLN (Q)31.18%
Proline PRO (P)145.49%
Serine SER (S)2710.59%
Arginine ARG (R)135.1%
Threonine THR (T)207.84%
Tryptophan TRP (W)51.96%
Valine VAL (V)176.67%
Tyrosine TYR (Y)51.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1216
HydrogenH1885
NitrogenN335
OxygenO375
SulphurS15

FormulaC1216H1885N335O375S15
Total Number of Atoms:3826


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    35700
Absorption 0.1% (=1 g/l)    1.290,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34950
Absorption 0.1% (=1 g/l)    1.263,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.62

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.24, 30.59, 15.69]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:72.2353
Grand average of hydropathicity (GRAVY):-0.15