Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5361
Number of amino acids:331
Molecular Weight:36890.81 Da
Theoretical pI:6.51


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)288.46%
Cysteine CYS (C)20.6%
Glutamic Acid GLU (E)154.53%
Aspartic Acid ASP (D)133.93%
Glycine GLY (G)216.34%
Phynylalanine PHE (F)175.14%
Isoleucine ILE (I)309.06%
Histidine HIS (H)41.21%
Lysine LYS (K)185.44%
Methionine MET (M)51.51%
Leucine LEU (L)267.85%
Asparagine ASN (N)329.67%
Glutamine GLN (Q)154.53%
Proline PRO (P)164.83%
Serine SER (S)267.85%
Arginine ARG (R)92.72%
Threonine THR (T)133.93%
Tryptophan TRP (W)20.6%
Valine VAL (V)185.44%
Tyrosine TYR (Y)216.34%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1673
HydrogenH2567
NitrogenN433
OxygenO495
SulphurS7

FormulaC1673H2567N433O495S7
Total Number of Atoms:5175


Total number of positively charged residues (ARG + LYS):27
Total number of negatively charged residues (ASP + GLU):28
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    42415
Absorption 0.1% (=1 g/l)    1.150,   assuming all pairs of CYS residues form cystines

Ext. coefficient    42290
Absorption 0.1% (=1 g/l)    1.146,   assuming all CYS residues are reduced
Aromaticity:0.121

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.11

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.44, 28.70, 22.36]

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:90.2115
Grand average of hydropathicity (GRAVY):-0.17