Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4382
Number of amino acids:227
Molecular Weight:26059.23 Da
Theoretical pI:9.01


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)73.08%
Cysteine CYS (C)83.52%
Glutamic Acid GLU (E)114.85%
Aspartic Acid ASP (D)125.29%
Glycine GLY (G)114.85%
Phynylalanine PHE (F)93.96%
Isoleucine ILE (I)187.93%
Histidine HIS (H)62.64%
Lysine LYS (K)2310.13%
Methionine MET (M)62.64%
Leucine LEU (L)177.49%
Asparagine ASN (N)146.17%
Glutamine GLN (Q)73.08%
Proline PRO (P)177.49%
Serine SER (S)135.73%
Arginine ARG (R)83.52%
Threonine THR (T)156.61%
Tryptophan TRP (W)41.76%
Valine VAL (V)125.29%
Tyrosine TYR (Y)93.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1173
HydrogenH1839
NitrogenN311
OxygenO332
SulphurS14

FormulaC1173H1839N311O332S14
Total Number of Atoms:3669


Total number of positively charged residues (ARG + LYS):31
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    35910
Absorption 0.1% (=1 g/l)    1.378,   assuming all pairs of CYS residues form cystines

Ext. coefficient    35410
Absorption 0.1% (=1 g/l)    1.359,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.66

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.40, 24.23, 18.06]

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:78.5463
Grand average of hydropathicity (GRAVY):-0.45