Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5529
Number of amino acids:259
Molecular Weight:27137.74 Da
Theoretical pI:9.78


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3111.97%
Cysteine CYS (C)93.47%
Glutamic Acid GLU (E)31.16%
Aspartic Acid ASP (D)83.09%
Glycine GLY (G)4115.83%
Phynylalanine PHE (F)124.63%
Isoleucine ILE (I)20.77%
Histidine HIS (H)51.93%
Lysine LYS (K)31.16%
Methionine MET (M)31.16%
Leucine LEU (L)2610.04%
Asparagine ASN (N)114.25%
Glutamine GLN (Q)93.47%
Proline PRO (P)135.02%
Serine SER (S)186.95%
Arginine ARG (R)218.11%
Threonine THR (T)145.41%
Tryptophan TRP (W)62.32%
Valine VAL (V)166.18%
Tyrosine TYR (Y)83.09%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1196
HydrogenH1845
NitrogenN361
OxygenO342
SulphurS12

FormulaC1196H1845N361O342S12
Total Number of Atoms:3756


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    45420
Absorption 0.1% (=1 g/l)    1.674,   assuming all pairs of CYS residues form cystines

Ext. coefficient    44920
Absorption 0.1% (=1 g/l)    1.655,   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 : 51.92

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.03, 32.05, 24.32]

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:72.0463
Grand average of hydropathicity (GRAVY):-0.06