Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4910
Number of amino acids:501
Molecular Weight:53928.99 Da
Theoretical pI:6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)214.19%
Cysteine CYS (C)102%
Glutamic Acid GLU (E)122.4%
Aspartic Acid ASP (D)346.79%
Glycine GLY (G)5611.18%
Phynylalanine PHE (F)183.59%
Isoleucine ILE (I)275.39%
Histidine HIS (H)152.99%
Lysine LYS (K)142.79%
Methionine MET (M)152.99%
Leucine LEU (L)418.18%
Asparagine ASN (N)295.79%
Glutamine GLN (Q)173.39%
Proline PRO (P)214.19%
Serine SER (S)7214.37%
Arginine ARG (R)244.79%
Threonine THR (T)295.79%
Tryptophan TRP (W)81.6%
Valine VAL (V)254.99%
Tyrosine TYR (Y)132.59%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2332
HydrogenH3627
NitrogenN671
OxygenO754
SulphurS25

FormulaC2332H3627N671O754S25
Total Number of Atoms:7409


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):46
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    63995
Absorption 0.1% (=1 g/l)    1.187,   assuming all pairs of CYS residues form cystines

Ext. coefficient    63370
Absorption 0.1% (=1 g/l)    1.175,   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 : 42.73

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.35, 35.53, 17.76]

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:71.5968
Grand average of hydropathicity (GRAVY):-0.33