Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4587
Number of amino acids:596
Molecular Weight:64743.38 Da
Theoretical pI:5.14


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)6410.74%
Cysteine CYS (C)81.34%
Glutamic Acid GLU (E)274.53%
Aspartic Acid ASP (D)508.39%
Glycine GLY (G)6010.07%
Phynylalanine PHE (F)223.69%
Isoleucine ILE (I)183.02%
Histidine HIS (H)193.19%
Lysine LYS (K)132.18%
Methionine MET (M)91.51%
Leucine LEU (L)498.22%
Asparagine ASN (N)213.52%
Glutamine GLN (Q)111.85%
Proline PRO (P)355.87%
Serine SER (S)406.71%
Arginine ARG (R)396.54%
Threonine THR (T)233.86%
Tryptophan TRP (W)152.52%
Valine VAL (V)538.89%
Tyrosine TYR (Y)203.36%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2878
HydrogenH4381
NitrogenN811
OxygenO866
SulphurS17

FormulaC2878H4381N811O866S17
Total Number of Atoms:8953


Total number of positively charged residues (ARG + LYS):52
Total number of negatively charged residues (ASP + GLU):77
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    112800
Absorption 0.1% (=1 g/l)    1.742,   assuming all pairs of CYS residues form cystines

Ext. coefficient    112300
Absorption 0.1% (=1 g/l)    1.735,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.97

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.70, 26.17, 25.00]

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:80.3692
Grand average of hydropathicity (GRAVY):-0.22