Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1367
Number of amino acids:229
Molecular Weight:24569.48 Da
Theoretical pI:4.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.99%
Cysteine CYS (C)177.42%
Glutamic Acid GLU (E)52.18%
Aspartic Acid ASP (D)156.55%
Glycine GLY (G)2310.04%
Phynylalanine PHE (F)135.68%
Isoleucine ILE (I)93.93%
Histidine HIS (H)20.87%
Lysine LYS (K)52.18%
Methionine MET (M)20.87%
Leucine LEU (L)146.11%
Asparagine ASN (N)166.99%
Glutamine GLN (Q)104.37%
Proline PRO (P)177.42%
Serine SER (S)177.42%
Arginine ARG (R)83.49%
Threonine THR (T)177.42%
Tryptophan TRP (W)41.75%
Valine VAL (V)125.24%
Tyrosine TYR (Y)73.06%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1070
HydrogenH1614
NitrogenN292
OxygenO337
SulphurS19

FormulaC1070H1614N292O337S19
Total Number of Atoms:3332


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33430
Absorption 0.1% (=1 g/l)    1.361,   assuming all pairs of CYS residues form cystines

Ext. coefficient    32430
Absorption 0.1% (=1 g/l)    1.320,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.76

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.76, 31.88, 16.16]

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:61.3537
Grand average of hydropathicity (GRAVY):-0.18