Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4198
Number of amino acids:391
Molecular Weight:43328.82 Da
Theoretical pI:5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)328.18%
Cysteine CYS (C)102.56%
Glutamic Acid GLU (E)225.63%
Aspartic Acid ASP (D)205.12%
Glycine GLY (G)287.16%
Phynylalanine PHE (F)348.7%
Isoleucine ILE (I)225.63%
Histidine HIS (H)102.56%
Lysine LYS (K)164.09%
Methionine MET (M)30.77%
Leucine LEU (L)317.93%
Asparagine ASN (N)205.12%
Glutamine GLN (Q)82.05%
Proline PRO (P)246.14%
Serine SER (S)307.67%
Arginine ARG (R)102.56%
Threonine THR (T)287.16%
Tryptophan TRP (W)30.77%
Valine VAL (V)205.12%
Tyrosine TYR (Y)205.12%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1982
HydrogenH2936
NitrogenN488
OxygenO582
SulphurS13

FormulaC1982H2936N488O582S13
Total Number of Atoms:6001


Total number of positively charged residues (ARG + LYS):26
Total number of negatively charged residues (ASP + GLU):42
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    46925
Absorption 0.1% (=1 g/l)    1.083,   assuming all pairs of CYS residues form cystines

Ext. coefficient    46300
Absorption 0.1% (=1 g/l)    1.069,   assuming all CYS residues are reduced
Aromaticity:0.146

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.88

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.25, 26.09, 22.51]

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:75.8824
Grand average of hydropathicity (GRAVY):-0.06