Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2042
Number of amino acids:47
Molecular Weight:5475.18 Da
Theoretical pI:8.20


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)10.02%
Cysteine CYS (C)80.17%
Glutamic Acid GLU (E)20.04%
Aspartic Acid ASP (D)50.11%
Glycine GLY (G)30.06%
Phynylalanine PHE (F)20.04%
Isoleucine ILE (I)00%
Histidine HIS (H)20.04%
Lysine LYS (K)40.09%
Methionine MET (M)00%
Leucine LEU (L)30.06%
Asparagine ASN (N)20.04%
Glutamine GLN (Q)00%
Proline PRO (P)10.02%
Serine SER (S)20.04%
Arginine ARG (R)50.11%
Threonine THR (T)50.11%
Tryptophan TRP (W)10.02%
Valine VAL (V)00%
Tyrosine TYR (Y)10.02%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC224
HydrogenH351
NitrogenN73
OxygenO72
SulphurS8

FormulaC224H351N73O72S8
Total Number of Atoms:728


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    1.368,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    1.277,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[0.15, 0.17, 0.12]

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:27.02
Grand average of hydropathicity (GRAVY):-1.006