Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4312
Number of amino acids:317
Molecular Weight:34705.72 Da
Theoretical pI:9.06


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)299.15%
Cysteine CYS (C)82.52%
Glutamic Acid GLU (E)113.47%
Aspartic Acid ASP (D)175.36%
Glycine GLY (G)206.31%
Phynylalanine PHE (F)154.73%
Isoleucine ILE (I)144.42%
Histidine HIS (H)123.79%
Lysine LYS (K)216.62%
Methionine MET (M)92.84%
Leucine LEU (L)288.83%
Asparagine ASN (N)216.62%
Glutamine GLN (Q)113.47%
Proline PRO (P)144.42%
Serine SER (S)288.83%
Arginine ARG (R)154.73%
Threonine THR (T)134.1%
Tryptophan TRP (W)10.32%
Valine VAL (V)247.57%
Tyrosine TYR (Y)61.89%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1524
HydrogenH2426
NitrogenN440
OxygenO453
SulphurS17

FormulaC1524H2426N440O453S17
Total Number of Atoms:4860


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):28
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14940
Absorption 0.1% (=1 g/l)    0.430,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14440
Absorption 0.1% (=1 g/l)    0.416,   assuming all CYS residues are reduced
Aromaticity:0.069

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.68

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.76, 26.18, 24.29]

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:82.776
Grand average of hydropathicity (GRAVY):-0.21