Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4970
Number of amino acids:515
Molecular Weight:56533.06 Da
Theoretical pI:4.99


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)6813.2%
Cysteine CYS (C)40.78%
Glutamic Acid GLU (E)468.93%
Aspartic Acid ASP (D)356.8%
Glycine GLY (G)285.44%
Phynylalanine PHE (F)305.83%
Isoleucine ILE (I)254.85%
Histidine HIS (H)112.14%
Lysine LYS (K)489.32%
Methionine MET (M)20.39%
Leucine LEU (L)428.16%
Asparagine ASN (N)173.3%
Glutamine GLN (Q)142.72%
Proline PRO (P)316.02%
Serine SER (S)265.05%
Arginine ARG (R)91.75%
Threonine THR (T)193.69%
Tryptophan TRP (W)40.78%
Valine VAL (V)387.38%
Tyrosine TYR (Y)183.5%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2575
HydrogenH3967
NitrogenN647
OxygenO772
SulphurS6

FormulaC2575H3967N647O772S6
Total Number of Atoms:7967


Total number of positively charged residues (ARG + LYS):57
Total number of negatively charged residues (ASP + GLU):81
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    49070
Absorption 0.1% (=1 g/l)    0.868,   assuming all pairs of CYS residues form cystines

Ext. coefficient    48820
Absorption 0.1% (=1 g/l)    0.864,   assuming all CYS residues are reduced
Aromaticity:0.101

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.16

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.49, 19.81, 30.68]

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:85.3398
Grand average of hydropathicity (GRAVY):-0.24