Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4122
Number of amino acids:428
Molecular Weight:46790.54 Da
Theoretical pI:5.6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)368.41%
Cysteine CYS (C)30.7%
Glutamic Acid GLU (E)327.48%
Aspartic Acid ASP (D)204.67%
Glycine GLY (G)358.18%
Phynylalanine PHE (F)153.5%
Isoleucine ILE (I)245.61%
Histidine HIS (H)163.74%
Lysine LYS (K)235.37%
Methionine MET (M)133.04%
Leucine LEU (L)4811.22%
Asparagine ASN (N)122.8%
Glutamine GLN (Q)143.27%
Proline PRO (P)204.67%
Serine SER (S)358.18%
Arginine ARG (R)153.5%
Threonine THR (T)204.67%
Tryptophan TRP (W)30.7%
Valine VAL (V)317.24%
Tyrosine TYR (Y)133.04%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2091
HydrogenH3303
NitrogenN557
OxygenO627
SulphurS16

FormulaC2091H3303N557O627S16
Total Number of Atoms:6594


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):52
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    35995
Absorption 0.1% (=1 g/l)    0.769,   assuming all pairs of CYS residues form cystines

Ext. coefficient    35870
Absorption 0.1% (=1 g/l)    0.767,   assuming all CYS residues are reduced
Aromaticity:0.072

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.31

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.31, 23.83, 30.14]

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:95.0236
Grand average of hydropathicity (GRAVY):-0.07