Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5477
Number of amino acids:465
Molecular Weight:52451.76 Da
Theoretical pI:5.15


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)306.45%
Cysteine CYS (C)91.94%
Glutamic Acid GLU (E)265.59%
Aspartic Acid ASP (D)265.59%
Glycine GLY (G)347.31%
Phynylalanine PHE (F)255.38%
Isoleucine ILE (I)194.09%
Histidine HIS (H)102.15%
Lysine LYS (K)194.09%
Methionine MET (M)71.51%
Leucine LEU (L)408.6%
Asparagine ASN (N)357.53%
Glutamine GLN (Q)102.15%
Proline PRO (P)286.02%
Serine SER (S)388.17%
Arginine ARG (R)183.87%
Threonine THR (T)245.16%
Tryptophan TRP (W)143.01%
Valine VAL (V)286.02%
Tyrosine TYR (Y)255.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2374
HydrogenH3523
NitrogenN617
OxygenO702
SulphurS16

FormulaC2374H3523N617O702S16
Total Number of Atoms:7232


Total number of positively charged residues (ARG + LYS):37
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    114750
Absorption 0.1% (=1 g/l)    2.188,   assuming all pairs of CYS residues form cystines

Ext. coefficient    114250
Absorption 0.1% (=1 g/l)    2.178,   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 : 39.22

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.47, 29.03, 22.15]

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:73.3979
Grand average of hydropathicity (GRAVY):-0.35