Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1172
Number of amino acids:228
Molecular Weight:24398.62 Da
Theoretical pI:5.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)167.02%
Cysteine CYS (C)187.89%
Glutamic Acid GLU (E)41.75%
Aspartic Acid ASP (D)135.7%
Glycine GLY (G)2510.96%
Phynylalanine PHE (F)135.7%
Isoleucine ILE (I)104.39%
Histidine HIS (H)10.44%
Lysine LYS (K)62.63%
Methionine MET (M)31.32%
Leucine LEU (L)135.7%
Asparagine ASN (N)135.7%
Glutamine GLN (Q)73.07%
Proline PRO (P)146.14%
Serine SER (S)167.02%
Arginine ARG (R)104.39%
Threonine THR (T)208.77%
Tryptophan TRP (W)31.32%
Valine VAL (V)146.14%
Tyrosine TYR (Y)93.95%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1065
HydrogenH1625
NitrogenN289
OxygenO328
SulphurS21

FormulaC1065H1625N289O328S21
Total Number of Atoms:3328


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    31035
Absorption 0.1% (=1 g/l)    1.272,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.226,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.93

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.19, 29.82, 15.79]

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:64.1666
Grand average of hydropathicity (GRAVY):-0.03