Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4533
Number of amino acids:501
Molecular Weight:55601.59 Da
Theoretical pI:4.81


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)367.19%
Cysteine CYS (C)51%
Glutamic Acid GLU (E)469.18%
Aspartic Acid ASP (D)367.19%
Glycine GLY (G)275.39%
Phynylalanine PHE (F)346.79%
Isoleucine ILE (I)265.19%
Histidine HIS (H)71.4%
Lysine LYS (K)469.18%
Methionine MET (M)40.8%
Leucine LEU (L)346.79%
Asparagine ASN (N)203.99%
Glutamine GLN (Q)152.99%
Proline PRO (P)244.79%
Serine SER (S)438.58%
Arginine ARG (R)102%
Threonine THR (T)275.39%
Tryptophan TRP (W)30.6%
Valine VAL (V)458.98%
Tyrosine TYR (Y)132.59%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2502
HydrogenH3877
NitrogenN629
OxygenO784
SulphurS9

FormulaC2502H3877N629O784S9
Total Number of Atoms:7801


Total number of positively charged residues (ARG + LYS):56
Total number of negatively charged residues (ASP + GLU):82
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    36120
Absorption 0.1% (=1 g/l)    0.650,   assuming all pairs of CYS residues form cystines

Ext. coefficient    35870
Absorption 0.1% (=1 g/l)    0.645,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.78

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.94, 22.75, 23.95]

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:79.9401
Grand average of hydropathicity (GRAVY):-0.33