Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4535
Number of amino acids:272
Molecular Weight:28840.69 Da
Theoretical pI:7.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3011.03%
Cysteine CYS (C)82.94%
Glutamic Acid GLU (E)82.94%
Aspartic Acid ASP (D)145.15%
Glycine GLY (G)3111.4%
Phynylalanine PHE (F)134.78%
Isoleucine ILE (I)82.94%
Histidine HIS (H)62.21%
Lysine LYS (K)93.31%
Methionine MET (M)51.84%
Leucine LEU (L)207.35%
Asparagine ASN (N)62.21%
Glutamine GLN (Q)82.94%
Proline PRO (P)114.04%
Serine SER (S)248.82%
Arginine ARG (R)145.15%
Threonine THR (T)207.35%
Tryptophan TRP (W)72.57%
Valine VAL (V)248.82%
Tyrosine TYR (Y)62.21%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1278
HydrogenH1976
NitrogenN356
OxygenO381
SulphurS13

FormulaC1278H1976N356O381S13
Total Number of Atoms:4004


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    47940
Absorption 0.1% (=1 g/l)    1.662,   assuming all pairs of CYS residues form cystines

Ext. coefficient    47440
Absorption 0.1% (=1 g/l)    1.645,   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 : 32.00

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.68, 26.47, 23.16]

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:76.7647
Grand average of hydropathicity (GRAVY):0.04