Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4514
Number of amino acids:399
Molecular Weight:45338.67 Da
Theoretical pI:8.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)194.76%
Cysteine CYS (C)30.75%
Glutamic Acid GLU (E)133.26%
Aspartic Acid ASP (D)194.76%
Glycine GLY (G)317.77%
Phynylalanine PHE (F)256.27%
Isoleucine ILE (I)276.77%
Histidine HIS (H)61.5%
Lysine LYS (K)276.77%
Methionine MET (M)112.76%
Leucine LEU (L)328.02%
Asparagine ASN (N)307.52%
Glutamine GLN (Q)225.51%
Proline PRO (P)164.01%
Serine SER (S)317.77%
Arginine ARG (R)112.76%
Threonine THR (T)235.76%
Tryptophan TRP (W)102.51%
Valine VAL (V)235.76%
Tyrosine TYR (Y)205.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2067
HydrogenH3133
NitrogenN533
OxygenO590
SulphurS14

FormulaC2067H3133N533O590S14
Total Number of Atoms:6337


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    84925
Absorption 0.1% (=1 g/l)    1.873,   assuming all pairs of CYS residues form cystines

Ext. coefficient    84800
Absorption 0.1% (=1 g/l)    1.870,   assuming all CYS residues are reduced
Aromaticity:0.138

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.48

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.34, 27.07, 18.80]

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:79.1479
Grand average of hydropathicity (GRAVY):-0.28