Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5072
Number of amino acids:329
Molecular Weight:35927.42 Da
Theoretical pI:9.44


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3310.03%
Cysteine CYS (C)82.43%
Glutamic Acid GLU (E)72.13%
Aspartic Acid ASP (D)206.08%
Glycine GLY (G)185.47%
Phynylalanine PHE (F)206.08%
Isoleucine ILE (I)154.56%
Histidine HIS (H)51.52%
Lysine LYS (K)288.51%
Methionine MET (M)61.82%
Leucine LEU (L)267.9%
Asparagine ASN (N)267.9%
Glutamine GLN (Q)113.34%
Proline PRO (P)154.56%
Serine SER (S)164.86%
Arginine ARG (R)133.95%
Threonine THR (T)267.9%
Tryptophan TRP (W)10.3%
Valine VAL (V)309.12%
Tyrosine TYR (Y)51.52%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1598
HydrogenH2558
NitrogenN444
OxygenO468
SulphurS14

FormulaC1598H2558N444O468S14
Total Number of Atoms:5082


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):27
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13450
Absorption 0.1% (=1 g/l)    0.374,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.360,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.17

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.48, 22.80, 21.88]

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:85.076
Grand average of hydropathicity (GRAVY):-0.12