Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5701
Number of amino acids:320
Molecular Weight:35203.57 Da
Theoretical pI:8.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)206.25%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)185.63%
Aspartic Acid ASP (D)134.06%
Glycine GLY (G)268.13%
Phynylalanine PHE (F)144.38%
Isoleucine ILE (I)319.69%
Histidine HIS (H)20.63%
Lysine LYS (K)216.56%
Methionine MET (M)41.25%
Leucine LEU (L)268.13%
Asparagine ASN (N)175.31%
Glutamine GLN (Q)195.94%
Proline PRO (P)247.5%
Serine SER (S)206.25%
Arginine ARG (R)134.06%
Threonine THR (T)144.38%
Tryptophan TRP (W)10.31%
Valine VAL (V)247.5%
Tyrosine TYR (Y)113.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1593
HydrogenH2537
NitrogenN421
OxygenO464
SulphurS6

FormulaC1593H2537N421O464S6
Total Number of Atoms:5021


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    22015
Absorption 0.1% (=1 g/l)    0.625,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21890
Absorption 0.1% (=1 g/l)    0.622,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.24

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.44, 27.19, 21.25]

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:97.4688
Grand average of hydropathicity (GRAVY):-0.14