Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1188
Number of amino acids:234
Molecular Weight:24601.37 Da
Theoretical pI:4.51


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)177.26%
Cysteine CYS (C)177.26%
Glutamic Acid GLU (E)62.56%
Aspartic Acid ASP (D)125.13%
Glycine GLY (G)3113.25%
Phynylalanine PHE (F)104.27%
Isoleucine ILE (I)83.42%
Histidine HIS (H)00%
Lysine LYS (K)83.42%
Methionine MET (M)20.85%
Leucine LEU (L)135.56%
Asparagine ASN (N)135.56%
Glutamine GLN (Q)114.7%
Proline PRO (P)104.27%
Serine SER (S)198.12%
Arginine ARG (R)41.71%
Threonine THR (T)2410.26%
Tryptophan TRP (W)41.71%
Valine VAL (V)135.56%
Tyrosine TYR (Y)125.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1067
HydrogenH1614
NitrogenN282
OxygenO350
SulphurS19

FormulaC1067H1614N282O350S19
Total Number of Atoms:3332


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40880
Absorption 0.1% (=1 g/l)    1.662,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39880
Absorption 0.1% (=1 g/l)    1.621,   assuming all CYS residues are reduced
Aromaticity:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.94

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.64, 31.20, 16.24]

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:58.3761
Grand average of hydropathicity (GRAVY):-0.13