Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5993
Number of amino acids:287
Molecular Weight:32475.21 Da
Theoretical pI:5.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)103.48%
Cysteine CYS (C)155.23%
Glutamic Acid GLU (E)103.48%
Aspartic Acid ASP (D)155.23%
Glycine GLY (G)113.83%
Phynylalanine PHE (F)186.27%
Isoleucine ILE (I)217.32%
Histidine HIS (H)51.74%
Lysine LYS (K)144.88%
Methionine MET (M)103.48%
Leucine LEU (L)248.36%
Asparagine ASN (N)227.67%
Glutamine GLN (Q)41.39%
Proline PRO (P)144.88%
Serine SER (S)2910.1%
Arginine ARG (R)82.79%
Threonine THR (T)289.76%
Tryptophan TRP (W)31.05%
Valine VAL (V)124.18%
Tyrosine TYR (Y)144.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1447
HydrogenH2218
NitrogenN364
OxygenO435
SulphurS25

FormulaC1447H2218N364O435S25
Total Number of Atoms:4489


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    38235
Absorption 0.1% (=1 g/l)    1.177,   assuming all pairs of CYS residues form cystines

Ext. coefficient    37360
Absorption 0.1% (=1 g/l)    1.150,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.43

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.06, 26.48, 18.82]

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:76.7596
Grand average of hydropathicity (GRAVY):-0.05