Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4783
Number of amino acids:269
Molecular Weight:29010.73 Da
Theoretical pI:5.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)207.43%
Cysteine CYS (C)82.97%
Glutamic Acid GLU (E)197.06%
Aspartic Acid ASP (D)207.43%
Glycine GLY (G)3211.9%
Phynylalanine PHE (F)103.72%
Isoleucine ILE (I)114.09%
Histidine HIS (H)51.86%
Lysine LYS (K)2710.04%
Methionine MET (M)51.86%
Leucine LEU (L)145.2%
Asparagine ASN (N)82.97%
Glutamine GLN (Q)20.74%
Proline PRO (P)176.32%
Serine SER (S)176.32%
Arginine ARG (R)62.23%
Threonine THR (T)165.95%
Tryptophan TRP (W)62.23%
Valine VAL (V)186.69%
Tyrosine TYR (Y)82.97%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1286
HydrogenH1986
NitrogenN340
OxygenO399
SulphurS13

FormulaC1286H1986N340O399S13
Total Number of Atoms:4024


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):39
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    45420
Absorption 0.1% (=1 g/l)    1.566,   assuming all pairs of CYS residues form cystines

Ext. coefficient    44920
Absorption 0.1% (=1 g/l)    1.548,   assuming all CYS residues are reduced
Aromaticity:0.089

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.70

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.91, 27.51, 21.56]

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:63.0855
Grand average of hydropathicity (GRAVY):-0.48