Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5158
Number of amino acids:228
Molecular Weight:25857.65 Da
Theoretical pI:9.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)73.07%
Cysteine CYS (C)83.51%
Glutamic Acid GLU (E)73.07%
Aspartic Acid ASP (D)93.95%
Glycine GLY (G)135.7%
Phynylalanine PHE (F)104.39%
Isoleucine ILE (I)146.14%
Histidine HIS (H)52.19%
Lysine LYS (K)177.46%
Methionine MET (M)83.51%
Leucine LEU (L)146.14%
Asparagine ASN (N)219.21%
Glutamine GLN (Q)104.39%
Proline PRO (P)156.58%
Serine SER (S)135.7%
Arginine ARG (R)83.51%
Threonine THR (T)2410.53%
Tryptophan TRP (W)41.75%
Valine VAL (V)135.7%
Tyrosine TYR (Y)83.51%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1145
HydrogenH1788
NitrogenN314
OxygenO337
SulphurS16

FormulaC1145H1788N314O337S16
Total Number of Atoms:3600


Total number of positively charged residues (ARG + LYS):25
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34420
Absorption 0.1% (=1 g/l)    1.331,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33920
Absorption 0.1% (=1 g/l)    1.312,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.87

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.63, 27.19, 15.79]

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:67.5
Grand average of hydropathicity (GRAVY):-0.47