Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4370
Number of amino acids:314
Molecular Weight:33428.77 Da
Theoretical pI:8.41


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)288.92%
Cysteine CYS (C)175.41%
Glutamic Acid GLU (E)61.91%
Aspartic Acid ASP (D)144.46%
Glycine GLY (G)4614.65%
Phynylalanine PHE (F)144.46%
Isoleucine ILE (I)165.1%
Histidine HIS (H)30.96%
Lysine LYS (K)113.5%
Methionine MET (M)41.27%
Leucine LEU (L)185.73%
Asparagine ASN (N)144.46%
Glutamine GLN (Q)144.46%
Proline PRO (P)175.41%
Serine SER (S)216.69%
Arginine ARG (R)144.46%
Threonine THR (T)196.05%
Tryptophan TRP (W)82.55%
Valine VAL (V)154.78%
Tyrosine TYR (Y)154.78%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1479
HydrogenH2237
NitrogenN409
OxygenO438
SulphurS21

FormulaC1479H2237N409O438S21
Total Number of Atoms:4584


Total number of positively charged residues (ARG + LYS):25
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    67350
Absorption 0.1% (=1 g/l)    2.015,   assuming all pairs of CYS residues form cystines

Ext. coefficient    66350
Absorption 0.1% (=1 g/l)    1.985,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.68

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.39, 31.21, 17.83]

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:65
Grand average of hydropathicity (GRAVY):-0.14