Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5500
Number of amino acids:347
Molecular Weight:37197.17 Da
Theoretical pI:6.7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)339.51%
Cysteine CYS (C)113.17%
Glutamic Acid GLU (E)113.17%
Aspartic Acid ASP (D)133.75%
Glycine GLY (G)246.92%
Phynylalanine PHE (F)195.48%
Isoleucine ILE (I)308.65%
Histidine HIS (H)72.02%
Lysine LYS (K)174.9%
Methionine MET (M)154.32%
Leucine LEU (L)4512.97%
Asparagine ASN (N)72.02%
Glutamine GLN (Q)82.31%
Proline PRO (P)133.75%
Serine SER (S)288.07%
Arginine ARG (R)61.73%
Threonine THR (T)288.07%
Tryptophan TRP (W)20.58%
Valine VAL (V)246.92%
Tyrosine TYR (Y)61.73%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1688
HydrogenH2715
NitrogenN413
OxygenO473
SulphurS26

FormulaC1688H2715N413O473S26
Total Number of Atoms:5315


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    20565
Absorption 0.1% (=1 g/l)    0.553,   assuming all pairs of CYS residues form cystines

Ext. coefficient    19940
Absorption 0.1% (=1 g/l)    0.536,   assuming all CYS residues are reduced
Aromaticity:0.078

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.19

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.31, 20.75, 29.97]

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:113.862
Grand average of hydropathicity (GRAVY):0.69