Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1055
Number of amino acids:255
Molecular Weight:26612.66 Da
Theoretical pI:4.44


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)197.45%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)62.35%
Aspartic Acid ASP (D)176.67%
Glycine GLY (G)2710.59%
Phynylalanine PHE (F)145.49%
Isoleucine ILE (I)62.35%
Histidine HIS (H)20.78%
Lysine LYS (K)93.53%
Methionine MET (M)31.18%
Leucine LEU (L)176.67%
Asparagine ASN (N)93.53%
Glutamine GLN (Q)51.96%
Proline PRO (P)145.49%
Serine SER (S)2810.98%
Arginine ARG (R)41.57%
Threonine THR (T)3112.16%
Tryptophan TRP (W)31.18%
Valine VAL (V)166.27%
Tyrosine TYR (Y)93.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1159
HydrogenH1765
NitrogenN297
OxygenO384
SulphurS19

FormulaC1159H1765N297O384S19
Total Number of Atoms:3624


Total number of positively charged residues (ARG + LYS):13
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    30910
Absorption 0.1% (=1 g/l)    1.161,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.124,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.17

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.49, 30.59, 17.65]

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:60.8235
Grand average of hydropathicity (GRAVY):-0.01