Physicochemical Properties of Peptide



PPepDB ID:PPepDB_807
Number of amino acids:236
Molecular Weight:25152.64 Da
Theoretical pI:8.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)208.47%
Cysteine CYS (C)166.78%
Glutamic Acid GLU (E)62.54%
Aspartic Acid ASP (D)135.51%
Glycine GLY (G)2510.59%
Phynylalanine PHE (F)104.24%
Isoleucine ILE (I)93.81%
Histidine HIS (H)10.42%
Lysine LYS (K)104.24%
Methionine MET (M)20.85%
Leucine LEU (L)198.05%
Asparagine ASN (N)83.39%
Glutamine GLN (Q)20.85%
Proline PRO (P)177.2%
Serine SER (S)218.9%
Arginine ARG (R)135.51%
Threonine THR (T)198.05%
Tryptophan TRP (W)31.27%
Valine VAL (V)114.66%
Tyrosine TYR (Y)114.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1105
HydrogenH1712
NitrogenN300
OxygenO336
SulphurS18

FormulaC1105H1712N300O336S18
Total Number of Atoms:3471


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33890
Absorption 0.1% (=1 g/l)    1.347,   assuming all pairs of CYS residues form cystines

Ext. coefficient    32890
Absorption 0.1% (=1 g/l)    1.308,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.69, 30.08, 19.92]

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:68.2627
Grand average of hydropathicity (GRAVY):-0.08