Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4953
Number of amino acids:299
Molecular Weight:31804.16 Da
Theoretical pI:7.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)186.02%
Cysteine CYS (C)165.35%
Glutamic Acid GLU (E)72.34%
Aspartic Acid ASP (D)165.35%
Glycine GLY (G)3110.37%
Phynylalanine PHE (F)113.68%
Isoleucine ILE (I)144.68%
Histidine HIS (H)20.67%
Lysine LYS (K)175.69%
Methionine MET (M)51.67%
Leucine LEU (L)279.03%
Asparagine ASN (N)155.02%
Glutamine GLN (Q)144.68%
Proline PRO (P)113.68%
Serine SER (S)3110.37%
Arginine ARG (R)82.68%
Threonine THR (T)237.69%
Tryptophan TRP (W)10.33%
Valine VAL (V)206.69%
Tyrosine TYR (Y)124.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1384
HydrogenH2196
NitrogenN374
OxygenO441
SulphurS21

FormulaC1384H2196N374O441S21
Total Number of Atoms:4416


Total number of positively charged residues (ARG + LYS):25
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    24380
Absorption 0.1% (=1 g/l)    0.767,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23380
Absorption 0.1% (=1 g/l)    0.735,   assuming all CYS residues are reduced
Aromaticity:0.080

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.27

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.43, 29.43, 19.06]

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:78.8963
Grand average of hydropathicity (GRAVY):-0.05