Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4837
Number of amino acids:279
Molecular Weight:30528.11 Da
Theoretical pI:5.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)155.38%
Cysteine CYS (C)134.66%
Glutamic Acid GLU (E)103.58%
Aspartic Acid ASP (D)196.81%
Glycine GLY (G)196.81%
Phynylalanine PHE (F)176.09%
Isoleucine ILE (I)103.58%
Histidine HIS (H)31.08%
Lysine LYS (K)113.94%
Methionine MET (M)20.72%
Leucine LEU (L)279.68%
Asparagine ASN (N)93.23%
Glutamine GLN (Q)72.51%
Proline PRO (P)72.51%
Serine SER (S)5118.28%
Arginine ARG (R)134.66%
Threonine THR (T)113.94%
Tryptophan TRP (W)10.36%
Valine VAL (V)186.45%
Tyrosine TYR (Y)165.73%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1343
HydrogenH2058
NitrogenN352
OxygenO432
SulphurS15

FormulaC1343H2058N352O432S15
Total Number of Atoms:4200


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):29
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    30090
Absorption 0.1% (=1 g/l)    0.986,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29340
Absorption 0.1% (=1 g/l)    0.961,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.09

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.90, 30.82, 19.35]

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:75.8064
Grand average of hydropathicity (GRAVY):-0.08