Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4133
Number of amino acids:284
Molecular Weight:32572.84 Da
Theoretical pI:8.29


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)134.58%
Cysteine CYS (C)41.41%
Glutamic Acid GLU (E)93.17%
Aspartic Acid ASP (D)217.39%
Glycine GLY (G)227.75%
Phynylalanine PHE (F)207.04%
Isoleucine ILE (I)82.82%
Histidine HIS (H)72.46%
Lysine LYS (K)165.63%
Methionine MET (M)82.82%
Leucine LEU (L)258.8%
Asparagine ASN (N)103.52%
Glutamine GLN (Q)124.23%
Proline PRO (P)134.58%
Serine SER (S)207.04%
Arginine ARG (R)165.63%
Threonine THR (T)269.15%
Tryptophan TRP (W)82.82%
Valine VAL (V)144.93%
Tyrosine TYR (Y)124.23%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1471
HydrogenH2212
NitrogenN392
OxygenO425
SulphurS12

FormulaC1471H2212N392O425S12
Total Number of Atoms:4512


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):30
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    62130
Absorption 0.1% (=1 g/l)    1.907,   assuming all pairs of CYS residues form cystines

Ext. coefficient    61880
Absorption 0.1% (=1 g/l)    1.900,   assuming all CYS residues are reduced
Aromaticity:0.141

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.49

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.63, 22.89, 19.37]

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:64.1901
Grand average of hydropathicity (GRAVY):-0.46