Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5209
Number of amino acids:303
Molecular Weight:32208.57 Da
Theoretical pI:4.23


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)216.93%
Cysteine CYS (C)154.95%
Glutamic Acid GLU (E)123.96%
Aspartic Acid ASP (D)216.93%
Glycine GLY (G)5317.49%
Phynylalanine PHE (F)154.95%
Isoleucine ILE (I)113.63%
Histidine HIS (H)30.99%
Lysine LYS (K)72.31%
Methionine MET (M)72.31%
Leucine LEU (L)216.93%
Asparagine ASN (N)144.62%
Glutamine GLN (Q)144.62%
Proline PRO (P)165.28%
Serine SER (S)196.27%
Arginine ARG (R)72.31%
Threonine THR (T)165.28%
Tryptophan TRP (W)82.64%
Valine VAL (V)72.31%
Tyrosine TYR (Y)165.28%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1416
HydrogenH2071
NitrogenN373
OxygenO449
SulphurS22

FormulaC1416H2071N373O449S22
Total Number of Atoms:4331


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):33
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    68715
Absorption 0.1% (=1 g/l)    2.133,   assuming all pairs of CYS residues form cystines

Ext. coefficient    67840
Absorption 0.1% (=1 g/l)    2.106,   assuming all CYS residues are reduced
Aromaticity:0.129

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 49.50

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.74, 33.66, 20.13]

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:54.8185
Grand average of hydropathicity (GRAVY):-0.31