Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5104
Number of amino acids:192
Molecular Weight:20395.74 Da
Theoretical pI:6.09


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2010.42%
Cysteine CYS (C)115.73%
Glutamic Acid GLU (E)84.17%
Aspartic Acid ASP (D)157.81%
Glycine GLY (G)2010.42%
Phynylalanine PHE (F)21.04%
Isoleucine ILE (I)52.6%
Histidine HIS (H)42.08%
Lysine LYS (K)73.65%
Methionine MET (M)21.04%
Leucine LEU (L)147.29%
Asparagine ASN (N)105.21%
Glutamine GLN (Q)31.56%
Proline PRO (P)94.69%
Serine SER (S)157.81%
Arginine ARG (R)147.29%
Threonine THR (T)126.25%
Tryptophan TRP (W)31.56%
Valine VAL (V)136.77%
Tyrosine TYR (Y)52.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC861
HydrogenH1371
NitrogenN265
OxygenO284
SulphurS13

FormulaC861H1371N265O284S13
Total Number of Atoms:2794


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    24575
Absorption 0.1% (=1 g/l)    1.205,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23950
Absorption 0.1% (=1 g/l)    1.174,   assuming all CYS residues are reduced
Aromaticity:0.052

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 56.46

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.88, 28.12, 22.92]

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:68.6459
Grand average of hydropathicity (GRAVY):-0.41