Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4248
Number of amino acids:350
Molecular Weight:37407.23 Da
Theoretical pI:6.42


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)288%
Cysteine CYS (C)113.14%
Glutamic Acid GLU (E)82.29%
Aspartic Acid ASP (D)144%
Glycine GLY (G)329.14%
Phynylalanine PHE (F)236.57%
Isoleucine ILE (I)329.14%
Histidine HIS (H)113.14%
Lysine LYS (K)154.29%
Methionine MET (M)144%
Leucine LEU (L)4312.29%
Asparagine ASN (N)102.86%
Glutamine GLN (Q)61.71%
Proline PRO (P)133.71%
Serine SER (S)288%
Arginine ARG (R)41.14%
Threonine THR (T)246.86%
Tryptophan TRP (W)20.57%
Valine VAL (V)257.14%
Tyrosine TYR (Y)72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1709
HydrogenH2697
NitrogenN417
OxygenO470
SulphurS25

FormulaC1709H2697N417O470S25
Total Number of Atoms:5318


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    22055
Absorption 0.1% (=1 g/l)    0.590,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21430
Absorption 0.1% (=1 g/l)    0.573,   assuming all CYS residues are reduced
Aromaticity:0.091

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.52

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[37.71, 23.71, 26.57]

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:112.286
Grand average of hydropathicity (GRAVY):0.72